Covalent organic frameworks(COFs),as a burgeoning class of crystalline porous materials have attracted widespread interest due to their designable structures and customized functions.However,the solvothermal synthesis...Covalent organic frameworks(COFs),as a burgeoning class of crystalline porous materials have attracted widespread interest due to their designable structures and customized functions.However,the solvothermal synthesis of COFs is often time-consuming and conducted at a high temperature within a sealed vessel,and also requires a large amount of poisonous solvents,which is generally not available for scaling-up production and commercial application.In recent years,great efforts have been made to explore simple,green,and efficient approaches for COFs synthesis.In this comprehensive review,we summarized the advances in emergent strategies by highlighting their distinct features.Fundamental issues and future directions are also discussed with the object of bringing implications for large-scale and sustainable fabrication of COFs.展开更多
Developing efficient electrocatalysts for oxygen evolution reaction(OER)is imperative to enhance the overall efficiency of electrolysis systems and rechargeable metal-air batteries operating in aqueous solutions.High-...Developing efficient electrocatalysts for oxygen evolution reaction(OER)is imperative to enhance the overall efficiency of electrolysis systems and rechargeable metal-air batteries operating in aqueous solutions.High-entropy materials,featured with their distinctive multi-component properties,have found extensive application as catalysts in electrochemical energy storage and conversion devices.However,synthesizing nanostructured high-entropy compounds under mild conditions poses a significant challenge due to the difficulty in overcoming the immiscibility of multiple metallic constituents.In this context,the current study focuses on the synthesis of an array of nano-sized high entropy sulfides tailored for OER via a facile precursor pyrolysis method at low temperature.The representative compound,Fe Co Ni Cu Mn Sx,demonstrates remarkable OER performance,achieving a current density of 10 m A/cm^(2) at an overpotential of merely 220 m V and excellent stability with constant electrolysis at 100 m A/cm^(2) for over 400 h.The in-situ formed metal(oxy)hydroxide has been confirmed as the real active sites and its exceptional performance can be primarily attributed to the synergistic effects arising from its multiple components.Furthermore,the synthetic methodology presented here is versatile and can be extended to the preparation of high entropy phosphides,which also present favorable OER performance.This research not only introduces promising non-noble electrocatalysts for OER but also offers a facile approach to expand the family of nano high-entropy materials,contributing significantly to the field of electrochemical energy conversion.展开更多
Electrocatalytic nitrogen reduction reaction(NRR)is considered as a promising candidate to achieve ammonia synthesis because of clean electric energy,moderate reaction condition,safe operating process and harmless by-...Electrocatalytic nitrogen reduction reaction(NRR)is considered as a promising candidate to achieve ammonia synthesis because of clean electric energy,moderate reaction condition,safe operating process and harmless by-products.However,the chemical inertness of nitrogen and poor activated capacity on catalyst surface usually produce low ammonia yield and faradic efficiency.Herein,the microfluidic technology is proposed to efficiently fabricate enriched iridium nanodots/carbon architecture.Owing to in-situ co-precipitation reaction and microfluidic manipulation,the iridium nanodots/carbon nanomaterials possess small average size,uniform dispersion,high conductivity and abundant active sites,producing good proton activation and rapid electrons transmission and moderate adsorption/desorption capacity.As a result,the as-prepared iridium nanodots/carbon nanomaterials realize large ammonia yield of 28.73 μg h^(-1) cm^(-2) and faradic efficiency of 9.14%in KOH solution.Moreover,the high ammonia yield of 11.21 μg h^(-1) cm^(-2) and faradic efficiency of 24.30%are also achieved in H_(2)SO_(4) solution.The microfluidic method provides a reference for large-scale fabrication of nano-sized catalyst materials,which may accelerate the progress of electrocatalytic NRR in industrialization field.展开更多
Carbon dots(CDs)have been extensively studied owing to their fascinating optical properties and wide potential applications.Here,we report an easy-to-perform and organic-solvent-free synthesis strategy for green-emiss...Carbon dots(CDs)have been extensively studied owing to their fascinating optical properties and wide potential applications.Here,we report an easy-to-perform and organic-solvent-free synthesis strategy for green-emissive CDs(G-CDs)possessing high photoluminescence(PL)quantum yield(QY).The G-CDs are synthesized by heating the homogeneous precursors of citric acid and cyanamide in an open vessel,circumventing the use of organic solvents,complex operations,high-pressure reactors,and expensive instruments in the synthesis process.The effect of various reaction variables on the formation and the optical properties of G-CDs are systematically investigated.The resultant G-CDs show bright PL emission at 521 nm with PL QY up to 73%.Then a white light-emitting diode(LED)with Commission Internationable de L'Eclairage(CIE)coordinates of(0.33,0.34)and color rendering index(CRI)of 92 is constructed based on G-CDs/thermoplastic polyurethane(TPU)composite.Moreover,a visual microfluidic detection platform is designed by using G-CDs as fluorescent probes for rapid quantitative detection of Fe^(3+),Cu^(2+),and Mn^(2+)metal ions,which can realize synchronized testing of multiple samples.This study might promote the development and preparation methods of high-performance CDs with various optical applications.展开更多
The mechanochemical synthesis of polycarboxylate superplasticizers(PCEs)was achieved using a planetary ball mill at ambient temperature.The effects of ball milling parameters,including speed,time,and stop method,on PC...The mechanochemical synthesis of polycarboxylate superplasticizers(PCEs)was achieved using a planetary ball mill at ambient temperature.The effects of ball milling parameters,including speed,time,and stop method,on PCE performance,molecular weight,and distribution were investigated to optimize conditions.The experimental results suggest that ball milling impacts PCE molecular weight and distribution,striking a balance between polymerization and mechanical degradation during synthesis.The optimal parameters were found to be 400 rpm,120 minutes total time,and 30 minutes milling plus 3 minutes rest cycles.Under these conditions,the PCE exhibits excellent dispersibility with a cement paste fluidity of 260 mm.The mechanochemical approach eliminates heating requirements,and also reduces the reaction time from 300 to 120 minutes compared to traditional aqueous synthesis.The optimized PCE demonstrates an increased density of long-side chains,leading to enhanced early strength,heightens adsorption,and diminished zeta potential in cement systems.These characteristics are comparable to traditionally synthesized PCEs.Moreover,at higher dosages,further augmentation of PCE adsorption and increased cement paste fluidity were noted here.展开更多
An efficient synthesis of substituted 1,3-dihydroisobenzofurans is developed. In this novel route, oaroylbenzaldehydes, as key intermediates, can be obtained by lead tetraacetate oxidation of Naroylhydrazones of salic...An efficient synthesis of substituted 1,3-dihydroisobenzofurans is developed. In this novel route, oaroylbenzaldehydes, as key intermediates, can be obtained by lead tetraacetate oxidation of Naroylhydrazones of salicylaldehydes. The mild and general strategy enables the synthesis of various substituted 1,3-dihydroisobenzofurans in high yields. Moreover, this method can be applied to efficiently synthesize escitalopram.展开更多
Fifteen title compounds 3a-0 were synthesized by condensation of 2chloro-benzothiazole with a-hydroxyphosphonates in good yields us- ing potassium iodide/tetrabutyl ammonium bromide as catalyst.All new com- pounds hav...Fifteen title compounds 3a-0 were synthesized by condensation of 2chloro-benzothiazole with a-hydroxyphosphonates in good yields us- ing potassium iodide/tetrabutyl ammonium bromide as catalyst.All new com- pounds have been identified by ~1H-NMR,IR and elemental analysis.展开更多
The title compounds are prepared in good yields by iodination of the corresponding flavones, thioflavones and thiochromones respectively using I_2-CAN(ceric ammonium nitrate) system. The compounds thus prepared are po...The title compounds are prepared in good yields by iodination of the corresponding flavones, thioflavones and thiochromones respectively using I_2-CAN(ceric ammonium nitrate) system. The compounds thus prepared are potentially useful precursors for the synthesis of C-3 linked binuclear compounds.展开更多
Deoxoqinghaosu,a more active antimalarial compound than qinghaosu,was efficiently synthesized from the readily available dihydroqinghaosu with a new reducing reagent BH_3NEt_3-Me_3SiCl.
An efficient and stereoselective four step synthesis of (-)-Massoialactone (1) is described. The key step involves deoxygenation of one alpha,beta - unsaturated carbonyl group in compound 5.
The generation of cellular energy in the form of ATP occurs mainly in mitochondria by oxidative phosphorylation.Cytochrome c oxidase(CytOx),the oxygen accepting and rate-limiting step of the respiratory chain,regulate...The generation of cellular energy in the form of ATP occurs mainly in mitochondria by oxidative phosphorylation.Cytochrome c oxidase(CytOx),the oxygen accepting and rate-limiting step of the respiratory chain,regulates the supply of variable ATP demands in cells by“allosteric ATP-inhibition of CytOx.”This mechanism is based on inhibition of oxygen uptake of CytOx at high ATP/ADP ratios and low ferrocytochrome c concentrations in the mitochondrial matrix via cooperative interaction of the two substrate binding sites in dimeric CytOx.The mechanism keeps mitochondrial membrane potentialΔΨm and reactive oxygen species(ROS)formation at low healthy values.Stress signals increase cytosolic calcium leading to Ca^2+-dependent dephosphorylation of CytOx subunit I at the cytosolic side accompanied by switching off the allosteric ATPinhibition and monomerization of CytOx.This is followed by increase ofΔΨm and formation of ROS.A hypothesis is presented suggesting a dynamic change of binding of NDUFA4,originally identified as a subunit of complex I,between monomeric CytOx(active state with highΔΨm,high ROS and low efficiency)and complex I(resting state with lowΔΨm,low ROS and high efficiency).展开更多
Fluoroalkyl N-sulfonyl hydrazones are versatile reagents that can be used to synthesize a wide range of diverse fluoroalkylated organic molecules.Although it has been known since 1975,the chemistry of fluoroalkyl N-su...Fluoroalkyl N-sulfonyl hydrazones are versatile reagents that can be used to synthesize a wide range of diverse fluoroalkylated organic molecules.Although it has been known since 1975,the chemistry of fluoroalkyl N-sulfonyl hydrazones has recently only received great attention from the scientific community.Generally,they are used as either safe and bench-stable diazo precursors in carbene transfer reactions or as 1,3-dipoles in cycloaddition and cyclization reactions.Notably,fluoroalkyl N-sulfonyl hydrazones to replace toxic fluoroalkyl diazo compounds in carbene transfer reactions reduce the risk of rapid accumulation of explosive diazo compounds and improve functional group compatibility and substrate scope.Given the growing importance of fluoroalkyl N-sulfonyl hydrazones in chemical synthesis,a comprehensive review of this topic in the literature is essential to demonstrate their synthetic potential.In this review,we critically summarize and comprehensively analyze the publications in various literatures on the chemistry of fluoroalkyl N-sulfonyl hydrazones starting from 1990 to date.The classification of the different reactivity profiles of fluoroalkyl N-sulfonyl hydrazones and the efficiencies of similar types of reactions or substrates with fluoroalkyl diazo compounds are compared.展开更多
High-purity and high-yield boron nitride nanotubes with large aspect ratio were prepared by a facile two-step process,including the synthesis of boron/nickel containing precursors by precipitation reactions and subseq...High-purity and high-yield boron nitride nanotubes with large aspect ratio were prepared by a facile two-step process,including the synthesis of boron/nickel containing precursors by precipitation reactions and subsequent thermally catalytic chemical vapor deposition reactions.The influence of catalyst content and annealing temperature on the phase composition and microstructure of the products were investigated.The results show that it is difficult to exert the catalytic effect of nickel-based catalyst at low temperatures(<1400℃).At appropriate temperatures(1400-1500℃),highly crystalline boron nitride nanotubes with a length of more than 50 mm and a diameter of 50 nm are formed.The content of catalyst in the precursor mainly affects the morphology of the boron nitride product.If the content is too low,it is easy to form boron nitride particles;while high catalyst content can easily lead to catalyst aggregation and form a submicron one-dimensional boron nitride with unregular structure.Based on microstructural evolutions,phase changes,and thermodynamic analysis,the vapor-liquid-solid(V-L-S)growth mechanism of the tip growth mode dominates the formation of boron nitride nanotubes has also been verified.展开更多
Subject Code:B02With the support of the National Natural Science Foundation of China,the research team led by Prof.Qin Yong(秦勇)at Sichuan University accomplished a collective synthesis of 33 monoterpenoid indole alk...Subject Code:B02With the support of the National Natural Science Foundation of China,the research team led by Prof.Qin Yong(秦勇)at Sichuan University accomplished a collective synthesis of 33 monoterpenoid indole alkaloids that belong to four families,by developing new photoredox-initiated radical cascade reactions.展开更多
(±)-Cembrene-A,a highly active scent-trail pheromone,was first isolated from thetermite(Nasutitermes exitiosus)and its structure was established by using chemical and spectralmethods,Afterwards,it was also found ...(±)-Cembrene-A,a highly active scent-trail pheromone,was first isolated from thetermite(Nasutitermes exitiosus)and its structure was established by using chemical and spectralmethods,Afterwards,it was also found in some plants and soft corals.In view of itsbiological activity,some total syntheses have been reported.It was reported that its dl-form showed the same order of activity as that of the natural pheromone,In previous work,展开更多
基金financially supported by the National Natural Science Foundation of China(Nos.22322801,22108010,22278124)Fundamental Research Funds for the Central Universities(No.buctrc202135)。
文摘Covalent organic frameworks(COFs),as a burgeoning class of crystalline porous materials have attracted widespread interest due to their designable structures and customized functions.However,the solvothermal synthesis of COFs is often time-consuming and conducted at a high temperature within a sealed vessel,and also requires a large amount of poisonous solvents,which is generally not available for scaling-up production and commercial application.In recent years,great efforts have been made to explore simple,green,and efficient approaches for COFs synthesis.In this comprehensive review,we summarized the advances in emergent strategies by highlighting their distinct features.Fundamental issues and future directions are also discussed with the object of bringing implications for large-scale and sustainable fabrication of COFs.
基金financially supported by the National Natural Science Foundation of China(Nos.22209183,22225902,U22A20436)the Advanced Talents of Jiangsu University,China(No.23JDG027)。
文摘Developing efficient electrocatalysts for oxygen evolution reaction(OER)is imperative to enhance the overall efficiency of electrolysis systems and rechargeable metal-air batteries operating in aqueous solutions.High-entropy materials,featured with their distinctive multi-component properties,have found extensive application as catalysts in electrochemical energy storage and conversion devices.However,synthesizing nanostructured high-entropy compounds under mild conditions poses a significant challenge due to the difficulty in overcoming the immiscibility of multiple metallic constituents.In this context,the current study focuses on the synthesis of an array of nano-sized high entropy sulfides tailored for OER via a facile precursor pyrolysis method at low temperature.The representative compound,Fe Co Ni Cu Mn Sx,demonstrates remarkable OER performance,achieving a current density of 10 m A/cm^(2) at an overpotential of merely 220 m V and excellent stability with constant electrolysis at 100 m A/cm^(2) for over 400 h.The in-situ formed metal(oxy)hydroxide has been confirmed as the real active sites and its exceptional performance can be primarily attributed to the synergistic effects arising from its multiple components.Furthermore,the synthetic methodology presented here is versatile and can be extended to the preparation of high entropy phosphides,which also present favorable OER performance.This research not only introduces promising non-noble electrocatalysts for OER but also offers a facile approach to expand the family of nano high-entropy materials,contributing significantly to the field of electrochemical energy conversion.
基金supported by the National Natural Science Foundation of China(22025801)and(22208190)National Postdoctoral Program for Innovative Talents(BX2021146)Shuimu Tsinghua Scholar Program(2021SM055).
文摘Electrocatalytic nitrogen reduction reaction(NRR)is considered as a promising candidate to achieve ammonia synthesis because of clean electric energy,moderate reaction condition,safe operating process and harmless by-products.However,the chemical inertness of nitrogen and poor activated capacity on catalyst surface usually produce low ammonia yield and faradic efficiency.Herein,the microfluidic technology is proposed to efficiently fabricate enriched iridium nanodots/carbon architecture.Owing to in-situ co-precipitation reaction and microfluidic manipulation,the iridium nanodots/carbon nanomaterials possess small average size,uniform dispersion,high conductivity and abundant active sites,producing good proton activation and rapid electrons transmission and moderate adsorption/desorption capacity.As a result,the as-prepared iridium nanodots/carbon nanomaterials realize large ammonia yield of 28.73 μg h^(-1) cm^(-2) and faradic efficiency of 9.14%in KOH solution.Moreover,the high ammonia yield of 11.21 μg h^(-1) cm^(-2) and faradic efficiency of 24.30%are also achieved in H_(2)SO_(4) solution.The microfluidic method provides a reference for large-scale fabrication of nano-sized catalyst materials,which may accelerate the progress of electrocatalytic NRR in industrialization field.
基金supported by National Natural Science Foundation of China(Nos.21736006 and 21978132)National Key Research and Development Program of China(No.2022YFC2104600)Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)。
文摘Carbon dots(CDs)have been extensively studied owing to their fascinating optical properties and wide potential applications.Here,we report an easy-to-perform and organic-solvent-free synthesis strategy for green-emissive CDs(G-CDs)possessing high photoluminescence(PL)quantum yield(QY).The G-CDs are synthesized by heating the homogeneous precursors of citric acid and cyanamide in an open vessel,circumventing the use of organic solvents,complex operations,high-pressure reactors,and expensive instruments in the synthesis process.The effect of various reaction variables on the formation and the optical properties of G-CDs are systematically investigated.The resultant G-CDs show bright PL emission at 521 nm with PL QY up to 73%.Then a white light-emitting diode(LED)with Commission Internationable de L'Eclairage(CIE)coordinates of(0.33,0.34)and color rendering index(CRI)of 92 is constructed based on G-CDs/thermoplastic polyurethane(TPU)composite.Moreover,a visual microfluidic detection platform is designed by using G-CDs as fluorescent probes for rapid quantitative detection of Fe^(3+),Cu^(2+),and Mn^(2+)metal ions,which can realize synchronized testing of multiple samples.This study might promote the development and preparation methods of high-performance CDs with various optical applications.
基金Funded by the National Natural Science Foundation of China(Nos.U1905216 and 52108208)the Henan Provincial Science and Technology Research Project(No.212102310559)。
文摘The mechanochemical synthesis of polycarboxylate superplasticizers(PCEs)was achieved using a planetary ball mill at ambient temperature.The effects of ball milling parameters,including speed,time,and stop method,on PCE performance,molecular weight,and distribution were investigated to optimize conditions.The experimental results suggest that ball milling impacts PCE molecular weight and distribution,striking a balance between polymerization and mechanical degradation during synthesis.The optimal parameters were found to be 400 rpm,120 minutes total time,and 30 minutes milling plus 3 minutes rest cycles.Under these conditions,the PCE exhibits excellent dispersibility with a cement paste fluidity of 260 mm.The mechanochemical approach eliminates heating requirements,and also reduces the reaction time from 300 to 120 minutes compared to traditional aqueous synthesis.The optimized PCE demonstrates an increased density of long-side chains,leading to enhanced early strength,heightens adsorption,and diminished zeta potential in cement systems.These characteristics are comparable to traditionally synthesized PCEs.Moreover,at higher dosages,further augmentation of PCE adsorption and increased cement paste fluidity were noted here.
基金supported by the National Basic Research Program of China(No.2011CB933503)Technology Supporting Program of Jiangsu Province(Nos.BE2009639 and BE2012657)
文摘An efficient synthesis of substituted 1,3-dihydroisobenzofurans is developed. In this novel route, oaroylbenzaldehydes, as key intermediates, can be obtained by lead tetraacetate oxidation of Naroylhydrazones of salicylaldehydes. The mild and general strategy enables the synthesis of various substituted 1,3-dihydroisobenzofurans in high yields. Moreover, this method can be applied to efficiently synthesize escitalopram.
文摘Fifteen title compounds 3a-0 were synthesized by condensation of 2chloro-benzothiazole with a-hydroxyphosphonates in good yields us- ing potassium iodide/tetrabutyl ammonium bromide as catalyst.All new com- pounds have been identified by ~1H-NMR,IR and elemental analysis.
文摘The title compounds are prepared in good yields by iodination of the corresponding flavones, thioflavones and thiochromones respectively using I_2-CAN(ceric ammonium nitrate) system. The compounds thus prepared are potentially useful precursors for the synthesis of C-3 linked binuclear compounds.
文摘Deoxoqinghaosu,a more active antimalarial compound than qinghaosu,was efficiently synthesized from the readily available dihydroqinghaosu with a new reducing reagent BH_3NEt_3-Me_3SiCl.
文摘An efficient and stereoselective four step synthesis of (-)-Massoialactone (1) is described. The key step involves deoxygenation of one alpha,beta - unsaturated carbonyl group in compound 5.
文摘The generation of cellular energy in the form of ATP occurs mainly in mitochondria by oxidative phosphorylation.Cytochrome c oxidase(CytOx),the oxygen accepting and rate-limiting step of the respiratory chain,regulates the supply of variable ATP demands in cells by“allosteric ATP-inhibition of CytOx.”This mechanism is based on inhibition of oxygen uptake of CytOx at high ATP/ADP ratios and low ferrocytochrome c concentrations in the mitochondrial matrix via cooperative interaction of the two substrate binding sites in dimeric CytOx.The mechanism keeps mitochondrial membrane potentialΔΨm and reactive oxygen species(ROS)formation at low healthy values.Stress signals increase cytosolic calcium leading to Ca^2+-dependent dephosphorylation of CytOx subunit I at the cytosolic side accompanied by switching off the allosteric ATPinhibition and monomerization of CytOx.This is followed by increase ofΔΨm and formation of ROS.A hypothesis is presented suggesting a dynamic change of binding of NDUFA4,originally identified as a subunit of complex I,between monomeric CytOx(active state with highΔΨm,high ROS and low efficiency)and complex I(resting state with lowΔΨm,low ROS and high efficiency).
基金the National Natural Science Foundation of China(21871043,21961130376)Department of Science and Technology of Jilin Province(20180101185JC,20190701012GH,20200801065GH)the Fundamental Research Funds for the Central Universities(2412019ZD001,2412019FZ006)。
文摘Fluoroalkyl N-sulfonyl hydrazones are versatile reagents that can be used to synthesize a wide range of diverse fluoroalkylated organic molecules.Although it has been known since 1975,the chemistry of fluoroalkyl N-sulfonyl hydrazones has recently only received great attention from the scientific community.Generally,they are used as either safe and bench-stable diazo precursors in carbene transfer reactions or as 1,3-dipoles in cycloaddition and cyclization reactions.Notably,fluoroalkyl N-sulfonyl hydrazones to replace toxic fluoroalkyl diazo compounds in carbene transfer reactions reduce the risk of rapid accumulation of explosive diazo compounds and improve functional group compatibility and substrate scope.Given the growing importance of fluoroalkyl N-sulfonyl hydrazones in chemical synthesis,a comprehensive review of this topic in the literature is essential to demonstrate their synthetic potential.In this review,we critically summarize and comprehensively analyze the publications in various literatures on the chemistry of fluoroalkyl N-sulfonyl hydrazones starting from 1990 to date.The classification of the different reactivity profiles of fluoroalkyl N-sulfonyl hydrazones and the efficiencies of similar types of reactions or substrates with fluoroalkyl diazo compounds are compared.
基金supported by the National Natural Science Foundation of China,China(52002293)the Young Elite Scientists Sponsorship Program by China Association for Science and Technology,China(2021QNRC001,YESS20210230)+3 种基金the Open Project of State Key Laboratory of Advanced Technology for Materials Synthesis and Processing of Wuhan University of Technology,China(21-KF-25)the Innovative Project of Key Laboratory of Green Chemical Engineering Process of Ministry of Education(GCX202106)Science Research Fund(K202029)College Students Innovation and Entrepreneurship Training Program(S202110490021)of Wuhan Institute of Technology,China.
文摘High-purity and high-yield boron nitride nanotubes with large aspect ratio were prepared by a facile two-step process,including the synthesis of boron/nickel containing precursors by precipitation reactions and subsequent thermally catalytic chemical vapor deposition reactions.The influence of catalyst content and annealing temperature on the phase composition and microstructure of the products were investigated.The results show that it is difficult to exert the catalytic effect of nickel-based catalyst at low temperatures(<1400℃).At appropriate temperatures(1400-1500℃),highly crystalline boron nitride nanotubes with a length of more than 50 mm and a diameter of 50 nm are formed.The content of catalyst in the precursor mainly affects the morphology of the boron nitride product.If the content is too low,it is easy to form boron nitride particles;while high catalyst content can easily lead to catalyst aggregation and form a submicron one-dimensional boron nitride with unregular structure.Based on microstructural evolutions,phase changes,and thermodynamic analysis,the vapor-liquid-solid(V-L-S)growth mechanism of the tip growth mode dominates the formation of boron nitride nanotubes has also been verified.
文摘Subject Code:B02With the support of the National Natural Science Foundation of China,the research team led by Prof.Qin Yong(秦勇)at Sichuan University accomplished a collective synthesis of 33 monoterpenoid indole alkaloids that belong to four families,by developing new photoredox-initiated radical cascade reactions.
基金Work supported by the National Natural Science Foundation of China and the National Education Commission Foundation of China.
文摘(±)-Cembrene-A,a highly active scent-trail pheromone,was first isolated from thetermite(Nasutitermes exitiosus)and its structure was established by using chemical and spectralmethods,Afterwards,it was also found in some plants and soft corals.In view of itsbiological activity,some total syntheses have been reported.It was reported that its dl-form showed the same order of activity as that of the natural pheromone,In previous work,
