The semiconductor photocatalysis are considered as one of the most promising candidates in hydrogen energy source and environmental remediation area.In this paper,flower-shaped SnS,is successfully combined on g-C,Ns,a...The semiconductor photocatalysis are considered as one of the most promising candidates in hydrogen energy source and environmental remediation area.In this paper,flower-shaped SnS,is successfully combined on g-C,Ns,and the well matching band structure successfully constitutes a new Type-II heterojunction.As expected,the photocatalytic hydrogen production experiment showed that the quantity of hydrogen produced on 5% SnS_(2)/C_(3)N_(5)was 922.5μmol/(g.h),which is 3.6 times higher than that of pure g-C_(3)N_(5).Meanwhile,in photocatalytic degradation of methylene blue,5%SnS2/C,Ns composite material can degrade 95% of contaminants within 40 min,showing good photocatalytic degradation performance.The mechanism study indicates that SnS_(2)/C_(3)N_(5)heterojunction improves the photogenerated charge migration rate and reduces the electron-hole recombination rate,and effectively improves the photocatalytic performance of g-C_(3)N_(5).This work provides a new idea for designing C,Ns-based heterojunctions with efficient hydrogen production and degradation performance.展开更多
The development of fluorescent probes enabling to distinguish Cys,Hcy and GSH has always been a considerable challenge,in particular the distinction of Hcy and other two biothiols,because Hcy has a very similar struct...The development of fluorescent probes enabling to distinguish Cys,Hcy and GSH has always been a considerable challenge,in particular the distinction of Hcy and other two biothiols,because Hcy has a very similar structure with Cys and a relatively lower concentration in living organisms.In this work,a special o-dialdehyde fluorescent probe,quinoline-2,3-dicarboxaldehyde(QDA),has been synthesized and demonstrated superior performance in differentiating detection of Hcy and GSH,which is different from the previous reported o-dialdehyde probes specifically detecting GSH.Furthermore,the probe can selectively distinguish Hcy and GSH from different signal channels in living cells and zebrafish,meaning it has great potential in biological applications.This finding will provide a novel idea for the design of fluorescent probes to distinguish biothiols.展开更多
An efficient route to the natural products bupleurynol and its analog（RB-2）,isolated from Bupleuri Radix,was established based on versatile intermediate（15）.In this synthetic route,Sonogashira and CadiotChodkiewic...An efficient route to the natural products bupleurynol and its analog（RB-2）,isolated from Bupleuri Radix,was established based on versatile intermediate（15）.In this synthetic route,Sonogashira and CadiotChodkiewicz coupling as well as Julia-Kocienski olefination are utilized as key steps.The highly efficient synthetic route provides opportunities to explore the biological behavior of bupleurynol and RB-2.展开更多
The treatment of pyrrolidine （C4HsNI-I） with sequentially trimethylaluminum andcarbodiimide CyN--C=NCy in a molar ratio of 1 ：1：1 in the presence of O2 afforded a newguanidinatoaluminurn complex, [{（C4HsN）C（NCy...The treatment of pyrrolidine （C4HsNI-I） with sequentially trimethylaluminum andcarbodiimide CyN--C=NCy in a molar ratio of 1 ：1：1 in the presence of O2 afforded a newguanidinatoaluminurn complex, [{（C4HsN）C（NCy）2}AIMe（/I-OMe）]2 （1）, which was characterizedby elemental analyses, 1H, 13C NMR spectra and single-crystal X-ray diffraction analysis. ComplexI crystallizes in monoclinic, space group P21/c with a = 9.8330（9）, b = 8.5786（8）, c = 24.159（2） A,β= 92.927（2）°, V= 2035.3（3） A3, Dc = 1.141 g cm^-3, F（000） = 768 and μ= 0.110 mm^-l. In addition,complex 1 was used to catalyze the Meerwein-Ponndorf-Verley （MPV） reduction and 1 as apre-catalyst at low catalyst loadings （5 tool%） exhibited good catalytic activity for the reduction ofa series of aldehydes to the corresponding alcohols in good yields （cony. up to 99%）.展开更多
Macrocyclic liquid crystals combine the unique property of liquid crystals and excellent supramolecular assembly ability of macrocyclic compounds.It is a significant challenge to make rational use of the advantages of...Macrocyclic liquid crystals combine the unique property of liquid crystals and excellent supramolecular assembly ability of macrocyclic compounds.It is a significant challenge to make rational use of the advantages of macrocyclic compounds to prepare new macrocyclic mesogens.Pillararenes,a type of macrocycles with rigid pillar-shaped frameworks and easy-tofunctionalize property,are excellent building blocks to fabricate liquid crystal materials.However,the site-selective modification property of pillararene has been rarely exploited to tailor liquid crystal behaviors.Previously reported pillararene-based liquid crystal systems are almost prepared by per-functionalized pillararenes.Herein,we report the regulation of chiral liquid crystal behaviors by different derivatization of pillararene.Lyotropic and thermotropic liquid crystals with different chirality were obtained by self-assembly of pillararene with different numbers of cholesterol groups.The bridge between thermotropic liquid crystal and lyotropic liquid crystal based on pillararene is built.In addition,the chirality of the mesogens can be amplified through supramolecular self-assembly driven by noncovalent interactions.Based on the different liquid crystal behaviors,the optical signal of the pillararene-based chiral liquid crystals was used to fabricate an information encryption system.This work provides a simple strategy to regulate liquid crystal behaviors via pillararene-based mesogens and realizes information encryption through the combination of different types of liquid crystals.展开更多
The sequential reaction of the N,N,O-tridentate ligand HOC(CH2)5CH2N(Me)CH2CH2NMe2(LH)in diethyl ether with AlEtCl2 and MeLi afforded a lithium-aluminum complex containing a polymeric structure of one-dimensional chai...The sequential reaction of the N,N,O-tridentate ligand HOC(CH2)5CH2N(Me)CH2CH2NMe2(LH)in diethyl ether with AlEtCl2 and MeLi afforded a lithium-aluminum complex containing a polymeric structure of one-dimensional chain[{-LiOC(CH2)5CH2N(Me)CH2CH2NMe2}AlMe2CH3-}n](1),which was characterized by 1H,13C NMR spectra,elemental analyses and single-crystal X-ray diffraction analysis.Complex 1 crystallizes in triclinic,space group P1 with a=10.526(3),b=10.949(3),c=17.799(4)?,β=76.211(11)°,V=1915.3(8)?3,Dc=1.014 g·cm–3,F(000)=648 andμ=0.104 mm–1.In addition,the heterobimetallic complex 1 was used to catalyze the Meerwein-Ponndorf-Verley(MPV)reaction and exhibited excellent catalytic activities in good yield(up to 97%).展开更多
基金This project was supported by the Fundamental Research Program of Shanxi Province(202303021221058)。
文摘The semiconductor photocatalysis are considered as one of the most promising candidates in hydrogen energy source and environmental remediation area.In this paper,flower-shaped SnS,is successfully combined on g-C,Ns,and the well matching band structure successfully constitutes a new Type-II heterojunction.As expected,the photocatalytic hydrogen production experiment showed that the quantity of hydrogen produced on 5% SnS_(2)/C_(3)N_(5)was 922.5μmol/(g.h),which is 3.6 times higher than that of pure g-C_(3)N_(5).Meanwhile,in photocatalytic degradation of methylene blue,5%SnS2/C,Ns composite material can degrade 95% of contaminants within 40 min,showing good photocatalytic degradation performance.The mechanism study indicates that SnS_(2)/C_(3)N_(5)heterojunction improves the photogenerated charge migration rate and reduces the electron-hole recombination rate,and effectively improves the photocatalytic performance of g-C_(3)N_(5).This work provides a new idea for designing C,Ns-based heterojunctions with efficient hydrogen production and degradation performance.
基金the National Natural Science Foundation of China(Nos.21672131,21775096,21907062)One Hundred People Plan of Shanxi Province+10 种基金Shanxi Province"1331 Project"Key Innovation Team Construction Plan Cultivation Team(No.2018-CT-1)2018 Xiangyuan County Solid Waste Comprehensive Utilization Science and Technology Project(No.2018XYSDJS-05)the Shanxi Province Foundation for Selected(2019)Innovative Talents of Higher Education Institutions of Shanxi(2019)Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi(No.2019L0031)Key R&D Program of Shanxi Province(No.201903D421069)Natural Science Foundation of Shanxi Province of China(No.201901D111015)Shanxi Province Foundation for Returness(No.2017-026)Program for the Innovative Talents of Higher Education Institutions of Shanxi(2019)Shanxi Collaborative Innovation Center of High Value-added Utilization of Coalrelated Wastes(No.2015-10-B3)Scientific Instrument Center of Shanxi University(No.201512)。
文摘The development of fluorescent probes enabling to distinguish Cys,Hcy and GSH has always been a considerable challenge,in particular the distinction of Hcy and other two biothiols,because Hcy has a very similar structure with Cys and a relatively lower concentration in living organisms.In this work,a special o-dialdehyde fluorescent probe,quinoline-2,3-dicarboxaldehyde(QDA),has been synthesized and demonstrated superior performance in differentiating detection of Hcy and GSH,which is different from the previous reported o-dialdehyde probes specifically detecting GSH.Furthermore,the probe can selectively distinguish Hcy and GSH from different signal channels in living cells and zebrafish,meaning it has great potential in biological applications.This finding will provide a novel idea for the design of fluorescent probes to distinguish biothiols.
基金financially supported by National Natural Science Foundation of China(Nos.21402111,81473415)Basic research program of Shanxi Province(No.2015021039)+1 种基金Shanxi Scholarship Council of China(No.2015-020)science and technology innovation project of Shanxi Province(No.2016115)
文摘An efficient route to the natural products bupleurynol and its analog（RB-2）,isolated from Bupleuri Radix,was established based on versatile intermediate（15）.In this synthetic route,Sonogashira and CadiotChodkiewicz coupling as well as Julia-Kocienski olefination are utilized as key steps.The highly efficient synthetic route provides opportunities to explore the biological behavior of bupleurynol and RB-2.
基金supported by the Natural Science Foundation of Shanxi Province(No.201601D202091)National Natural Science Foundation of China(No.20572065)Special Fund for Agro-scientific Research in the Public Interest(No.201303106)
文摘The treatment of pyrrolidine （C4HsNI-I） with sequentially trimethylaluminum andcarbodiimide CyN--C=NCy in a molar ratio of 1 ：1：1 in the presence of O2 afforded a newguanidinatoaluminurn complex, [{（C4HsN）C（NCy）2}AIMe（/I-OMe）]2 （1）, which was characterizedby elemental analyses, 1H, 13C NMR spectra and single-crystal X-ray diffraction analysis. ComplexI crystallizes in monoclinic, space group P21/c with a = 9.8330（9）, b = 8.5786（8）, c = 24.159（2） A,β= 92.927（2）°, V= 2035.3（3） A3, Dc = 1.141 g cm^-3, F（000） = 768 and μ= 0.110 mm^-l. In addition,complex 1 was used to catalyze the Meerwein-Ponndorf-Verley （MPV） reduction and 1 as apre-catalyst at low catalyst loadings （5 tool%） exhibited good catalytic activity for the reduction ofa series of aldehydes to the corresponding alcohols in good yields （cony. up to 99%）.
基金supported by the National Science Foundation for Young Scientists of China(21901149)the General Program of Natural Science Foundation of Shanxi Province,China(202103021224072 and 202303021211005)。
文摘Macrocyclic liquid crystals combine the unique property of liquid crystals and excellent supramolecular assembly ability of macrocyclic compounds.It is a significant challenge to make rational use of the advantages of macrocyclic compounds to prepare new macrocyclic mesogens.Pillararenes,a type of macrocycles with rigid pillar-shaped frameworks and easy-tofunctionalize property,are excellent building blocks to fabricate liquid crystal materials.However,the site-selective modification property of pillararene has been rarely exploited to tailor liquid crystal behaviors.Previously reported pillararene-based liquid crystal systems are almost prepared by per-functionalized pillararenes.Herein,we report the regulation of chiral liquid crystal behaviors by different derivatization of pillararene.Lyotropic and thermotropic liquid crystals with different chirality were obtained by self-assembly of pillararene with different numbers of cholesterol groups.The bridge between thermotropic liquid crystal and lyotropic liquid crystal based on pillararene is built.In addition,the chirality of the mesogens can be amplified through supramolecular self-assembly driven by noncovalent interactions.Based on the different liquid crystal behaviors,the optical signal of the pillararene-based chiral liquid crystals was used to fabricate an information encryption system.This work provides a simple strategy to regulate liquid crystal behaviors via pillararene-based mesogens and realizes information encryption through the combination of different types of liquid crystals.
基金supported by the Inner Mongolia Natural Science Foundation(No.2017BS0202)the Major project of Ordos science and technology(No.2019ZD065)+1 种基金the Scientific Research Project of Ordos Institute of Technology(No.KYZD2018001)Colleges and Universities’Scientific Research Project(NJZY17401)。
文摘The sequential reaction of the N,N,O-tridentate ligand HOC(CH2)5CH2N(Me)CH2CH2NMe2(LH)in diethyl ether with AlEtCl2 and MeLi afforded a lithium-aluminum complex containing a polymeric structure of one-dimensional chain[{-LiOC(CH2)5CH2N(Me)CH2CH2NMe2}AlMe2CH3-}n](1),which was characterized by 1H,13C NMR spectra,elemental analyses and single-crystal X-ray diffraction analysis.Complex 1 crystallizes in triclinic,space group P1 with a=10.526(3),b=10.949(3),c=17.799(4)?,β=76.211(11)°,V=1915.3(8)?3,Dc=1.014 g·cm–3,F(000)=648 andμ=0.104 mm–1.In addition,the heterobimetallic complex 1 was used to catalyze the Meerwein-Ponndorf-Verley(MPV)reaction and exhibited excellent catalytic activities in good yield(up to 97%).
