Two new dinuclear lanthanidecomplexes,namely[Ln_(2)(dbm)_(2)(HL)_(2)(CH_(3)OH)_(2)]·4CH_(3)OH[Ln=Tb(1)and Dy(2),Hdbm=dibenzoylmethane]have been synthesized using prepared multidentate Schiff base ligand H_(3)L(hy...Two new dinuclear lanthanidecomplexes,namely[Ln_(2)(dbm)_(2)(HL)_(2)(CH_(3)OH)_(2)]·4CH_(3)OH[Ln=Tb(1)and Dy(2),Hdbm=dibenzoylmethane]have been synthesized using prepared multidentate Schiff base ligand H_(3)L(hydroxy‑acetic acid(4‑diethylamino‑2‑hydroxy‑benzylidene)‑hydrazide)with good biological activity.Structure characterizations show that the complex comprises two Ln3+ions,two dbm-ions,two HL^(2-)ligands,two CH_(3)OH molecules,and four free methanol molecules.Each Ln^(3+)ion is eight‑coordinated.The two central Lnions are bridged by twoμ_(2)‑O atoms leading to a parallelogram[Ln2O2]core.The interaction between the compounds(H_(3)L,1,and 2)and the calf thymus DNA(CT‑DNA)has been further confirmed by UV‑Vis spectrometry,fluorescence titration,and cyclic voltammetry.The results showed that both 1 and 2 could undergo insertion with CT‑DNA.CCDC:2343005,1;2343006,2.展开更多
Novel chiral PN_4-type multidentate aminophosphine ligands have been successfully synthesized by Schiff-base condensation of bis（o-formylphenyl）phenylphosphane and various chiral amino-sulfonamides.Their structures ...Novel chiral PN_4-type multidentate aminophosphine ligands have been successfully synthesized by Schiff-base condensation of bis（o-formylphenyl）phenylphosphane and various chiral amino-sulfonamides.Their structures were fully characterized by IR,EI-MS and NMR.The catalytic systems,prepared in situ from the multidentate ligands and iridium（I） complexes,showed high activity in asymmetric transfer hydrogenation of propiophenone in 2-propanol solution,leading to corresponding optical alcohol with up to 75%ee.展开更多
To search for more better sensitizer of organic solar cell, a series of multidentate squaraines (Sq1~6) were synthesized, the structures were determined by elemental analysis, IR, UV-vis, 1H NMR and MS spectroscopies....To search for more better sensitizer of organic solar cell, a series of multidentate squaraines (Sq1~6) were synthesized, the structures were determined by elemental analysis, IR, UV-vis, 1H NMR and MS spectroscopies. The squaraines have good solubility in polar solvents such as EtOH, CH3COCH3, CHCl3,etc. as well as strong absorption band over 600~700 nm spectral range.展开更多
Sb_(2)S_(3)is a promising candidate for the flexible solar cells or the top subcells in tandem solar cells due to its wide-bandgap,less toxic,acceptable cost and progressive power conversion efficiency(PCE).However,th...Sb_(2)S_(3)is a promising candidate for the flexible solar cells or the top subcells in tandem solar cells due to its wide-bandgap,less toxic,acceptable cost and progressive power conversion efficiency(PCE).However,the poor quality and high trap states of Sb_(2)S_(3)films limit the device performance further enhancement.Herein,we adopt a multidentate ionic liquid,tetramethylammonium hexafluorophosphate([TMA][PF_(6)])as a novel additive to address this issue.The octahedral[PF_(6)]~-contains six different oriented fluorine atoms with the lone pair electrons,which could coordinate with Sb atoms due to the multidentate anchoring.Thus,the high-quality Sb_(2)S_(3)film with low trap states has been achieved.Moreover,the Fermi level of the Sb_(2)S_(3)film has been upshifted,thereby showing an effective charge transfer.As a result,all photovoltaic parameters of the optimized Sb_(2)S_(3)devices are obviously enhanced,boosting the final PCE from 4.43(control device)to 6.83%.Our study about the multidentate anchoring is manifested to be an effective method to enhance the Sb_(2)S_(3)device performance.展开更多
Efficient use of energy is a pressing issue.Improvement of chemical processes is currently an important target for energy efficiency.Although chemical processes are independent of pathways with respect to the final en...Efficient use of energy is a pressing issue.Improvement of chemical processes is currently an important target for energy efficiency.Although chemical processes are independent of pathways with respect to the final energy output or consumption,the application of catalysts can reduce involved activation energies considerably and therefore save large amounts of energy.展开更多
By using a flexible multidentate ligand,bis（2-hydroxyethyl）iminotris（hydroxyhydroxylmethy）methane（＇bis-tris＇：H5L）,the title complex {[Na（H6L）2]2}n·nV10O28（1） has been successfully synthesized under s...By using a flexible multidentate ligand,bis（2-hydroxyethyl）iminotris（hydroxyhydroxylmethy）methane（＇bis-tris＇：H5L）,the title complex {[Na（H6L）2]2}n·nV10O28（1） has been successfully synthesized under self-assembly condition and characterized by IR spectroscopy,elemental analysis,PXRD and single-crystal X-ray diffraction.The crystal structure belongs to an orthorhombic system,space group Cmca with a = 23.752（2）,b = 13.5360（8）,c = 18.5377（11） ,V = 5960.1（7）,Z = 8,Dc = 2.055 g/cm3,F（000） = 3744,μ = 1.630 mm-1,the final R = 0.0283 and wR = 0.0759 for 3353 observed reflections with I 〉 2σ（I）.This complex consists of decavanadate [V10O28]6-motifs as counter anions intercalated with one-dimensiond chains of the composition [Na（H6L）2]n3n＋.And significant intermolecular O-H…O hydrogen-bonding interactions lead to a three-dimensional supramolecular framework.展开更多
A novel 1,2,3-triazolyl-containing ligand （H2L） with long donor arms extending from the central pyridyl linker was synthesized by click cycloaddition of 2,6-bis（azidomethyl）pyri- line and 2-（（prop-2-yn-1-yl（pyr...A novel 1,2,3-triazolyl-containing ligand （H2L） with long donor arms extending from the central pyridyl linker was synthesized by click cycloaddition of 2,6-bis（azidomethyl）pyri- line and 2-（（prop-2-yn-1-yl（pyridin-2-ylmethyl）amino）methyl）phenol. Further treatment of the igand H2L with zinc（II） perchlorate in the presence of triethylaminc, followed by anion exchange vith Na[BPh4], provided a dinuclear zinc（II） complex [Zn2L][BPh4]E-2DMF （1）. Complex 1 crystallizes in monoclinic, space group P21 with a = 10.4873（4）, b = 14.9078（5）, c = 25.8620（9） A, = 94.566（2）°, V = 4030.5（2） A3, Z = 2,μ= 0.657 mm-1, Dc = 1.324 Mg/m3, T = 296（2） K, C93H91N13B2O4Zn2, Mr = 1607.19, F（000） = 1684, S = 0.958, R = 0.0271 and wR = 0.0607. In the tructurc of cation, the phenolate oxygen atoms of ligand act as the bridging nodes to form a hombic Zn2（OAr）2 core.展开更多
Colloidal all-inorganic perovskite nanocrystals(PNCs),possessing unique optical properties,have attracted considerable attention in the field of semiconductor nanocrystals(NCs),but their application is hindered by the...Colloidal all-inorganic perovskite nanocrystals(PNCs),possessing unique optical properties,have attracted considerable attention in the field of semiconductor nanocrystals(NCs),but their application is hindered by the stability issue resulting partly from dynamic capping ligand binding.Herein,we report a simple method for the synthesis of all-inorganic cesium lead-based(CsPbX3)NCs with enhanced structural stability and photoluminescence quantum yield.Aluminum distearate(AlDS)was introduced into the preparation of CsPbX3 NCs,on the basis that the surface defects of CsPbX3 NCs are passivated to form a protective layer on the CsPbX3 NC surface simultaneously.Benefiting from surface modification,the resistance of the CsPbX3 NC dispersion against ethanol,ultraviolet irradiation,and heat treatment was enhanced effectively.Moreover,the photoluminescence intensity and stability of the AlDS–modified NC-based films displayed functional superiority to those of pristine NC-based films.展开更多
文摘Two new dinuclear lanthanidecomplexes,namely[Ln_(2)(dbm)_(2)(HL)_(2)(CH_(3)OH)_(2)]·4CH_(3)OH[Ln=Tb(1)and Dy(2),Hdbm=dibenzoylmethane]have been synthesized using prepared multidentate Schiff base ligand H_(3)L(hydroxy‑acetic acid(4‑diethylamino‑2‑hydroxy‑benzylidene)‑hydrazide)with good biological activity.Structure characterizations show that the complex comprises two Ln3+ions,two dbm-ions,two HL^(2-)ligands,two CH_(3)OH molecules,and four free methanol molecules.Each Ln^(3+)ion is eight‑coordinated.The two central Lnions are bridged by twoμ_(2)‑O atoms leading to a parallelogram[Ln2O2]core.The interaction between the compounds(H_(3)L,1,and 2)and the calf thymus DNA(CT‑DNA)has been further confirmed by UV‑Vis spectrometry,fluorescence titration,and cyclic voltammetry.The results showed that both 1 and 2 could undergo insertion with CT‑DNA.CCDC:2343005,1;2343006,2.
基金the National Natural Science Foundation of China(Nos20423002 and 20703034)Natural Science Foundation of Fujian Province of China(No2008J0235) for the financial support of this work
文摘Novel chiral PN_4-type multidentate aminophosphine ligands have been successfully synthesized by Schiff-base condensation of bis（o-formylphenyl）phenylphosphane and various chiral amino-sulfonamides.Their structures were fully characterized by IR,EI-MS and NMR.The catalytic systems,prepared in situ from the multidentate ligands and iridium（I） complexes,showed high activity in asymmetric transfer hydrogenation of propiophenone in 2-propanol solution,leading to corresponding optical alcohol with up to 75%ee.
文摘To search for more better sensitizer of organic solar cell, a series of multidentate squaraines (Sq1~6) were synthesized, the structures were determined by elemental analysis, IR, UV-vis, 1H NMR and MS spectroscopies. The squaraines have good solubility in polar solvents such as EtOH, CH3COCH3, CHCl3,etc. as well as strong absorption band over 600~700 nm spectral range.
基金financially supported by the Basic Research Fund for Free Exploration in Shenzhen(No.JCYJ20180306171402878)the National Natural Science Foundation of China(No.52072228,51571166 and 21603175)the Fundamental Research Funds for the Central Universities(No.3102019JC005)。
文摘Sb_(2)S_(3)is a promising candidate for the flexible solar cells or the top subcells in tandem solar cells due to its wide-bandgap,less toxic,acceptable cost and progressive power conversion efficiency(PCE).However,the poor quality and high trap states of Sb_(2)S_(3)films limit the device performance further enhancement.Herein,we adopt a multidentate ionic liquid,tetramethylammonium hexafluorophosphate([TMA][PF_(6)])as a novel additive to address this issue.The octahedral[PF_(6)]~-contains six different oriented fluorine atoms with the lone pair electrons,which could coordinate with Sb atoms due to the multidentate anchoring.Thus,the high-quality Sb_(2)S_(3)film with low trap states has been achieved.Moreover,the Fermi level of the Sb_(2)S_(3)film has been upshifted,thereby showing an effective charge transfer.As a result,all photovoltaic parameters of the optimized Sb_(2)S_(3)devices are obviously enhanced,boosting the final PCE from 4.43(control device)to 6.83%.Our study about the multidentate anchoring is manifested to be an effective method to enhance the Sb_(2)S_(3)device performance.
基金The National Natural Science Foundation of China(22078317)。
文摘Efficient use of energy is a pressing issue.Improvement of chemical processes is currently an important target for energy efficiency.Although chemical processes are independent of pathways with respect to the final energy output or consumption,the application of catalysts can reduce involved activation energies considerably and therefore save large amounts of energy.
基金supported by 973 Program (2011CB932504), NNSFC (20971121)NSF for Young Scientists of China (20801056)NSF of Fujian Province
文摘By using a flexible multidentate ligand,bis（2-hydroxyethyl）iminotris（hydroxyhydroxylmethy）methane（＇bis-tris＇：H5L）,the title complex {[Na（H6L）2]2}n·nV10O28（1） has been successfully synthesized under self-assembly condition and characterized by IR spectroscopy,elemental analysis,PXRD and single-crystal X-ray diffraction.The crystal structure belongs to an orthorhombic system,space group Cmca with a = 23.752（2）,b = 13.5360（8）,c = 18.5377（11） ,V = 5960.1（7）,Z = 8,Dc = 2.055 g/cm3,F（000） = 3744,μ = 1.630 mm-1,the final R = 0.0283 and wR = 0.0759 for 3353 observed reflections with I 〉 2σ（I）.This complex consists of decavanadate [V10O28]6-motifs as counter anions intercalated with one-dimensiond chains of the composition [Na（H6L）2]n3n＋.And significant intermolecular O-H…O hydrogen-bonding interactions lead to a three-dimensional supramolecular framework.
基金Financially supported by the Education Department of Jiangxi Province(GJJ13106)
文摘A novel 1,2,3-triazolyl-containing ligand （H2L） with long donor arms extending from the central pyridyl linker was synthesized by click cycloaddition of 2,6-bis（azidomethyl）pyri- line and 2-（（prop-2-yn-1-yl（pyridin-2-ylmethyl）amino）methyl）phenol. Further treatment of the igand H2L with zinc（II） perchlorate in the presence of triethylaminc, followed by anion exchange vith Na[BPh4], provided a dinuclear zinc（II） complex [Zn2L][BPh4]E-2DMF （1）. Complex 1 crystallizes in monoclinic, space group P21 with a = 10.4873（4）, b = 14.9078（5）, c = 25.8620（9） A, = 94.566（2）°, V = 4030.5（2） A3, Z = 2,μ= 0.657 mm-1, Dc = 1.324 Mg/m3, T = 296（2） K, C93H91N13B2O4Zn2, Mr = 1607.19, F（000） = 1684, S = 0.958, R = 0.0271 and wR = 0.0607. In the tructurc of cation, the phenolate oxygen atoms of ligand act as the bridging nodes to form a hombic Zn2（OAr）2 core.
基金the National Natural Science Foundation of China(grant nos.21771063 and 21975075)the State Key Research Development Program of China(grant no.2016YFA0204200)+1 种基金the Shanghai Municipal Science and Technology Major Project(grant no.2018SHZDZX03)the Programme of Introducing Talents of Discipline to Universities(B16017).
文摘Colloidal all-inorganic perovskite nanocrystals(PNCs),possessing unique optical properties,have attracted considerable attention in the field of semiconductor nanocrystals(NCs),but their application is hindered by the stability issue resulting partly from dynamic capping ligand binding.Herein,we report a simple method for the synthesis of all-inorganic cesium lead-based(CsPbX3)NCs with enhanced structural stability and photoluminescence quantum yield.Aluminum distearate(AlDS)was introduced into the preparation of CsPbX3 NCs,on the basis that the surface defects of CsPbX3 NCs are passivated to form a protective layer on the CsPbX3 NC surface simultaneously.Benefiting from surface modification,the resistance of the CsPbX3 NC dispersion against ethanol,ultraviolet irradiation,and heat treatment was enhanced effectively.Moreover,the photoluminescence intensity and stability of the AlDS–modified NC-based films displayed functional superiority to those of pristine NC-based films.
