Two homochiral enantiomorphic 3D coordination polymers: (D-HAPA)2[Cd2Cs(D- HAPA)(m-BDC)4]'(EtOH) (1D) and (L-HAPA)2[Cd2Cs(L-HAPA)(m-BDC)a]'(EtOH) (1L) (APA = 2-amino-l-propanol, m-H2BDC = 1,3-b...Two homochiral enantiomorphic 3D coordination polymers: (D-HAPA)2[Cd2Cs(D- HAPA)(m-BDC)4]'(EtOH) (1D) and (L-HAPA)2[Cd2Cs(L-HAPA)(m-BDC)a]'(EtOH) (1L) (APA = 2-amino-l-propanol, m-H2BDC = 1,3-benzenedicarboxylate), have been assembled solvothermally respectively with the induction of enantiomorphic organic small molecules (D,L-APA). 1L and 1I) crystallize in chiral space group P21 with Flack parameters of-0.012(13) and -0.07(3), respectively, and have been characterized by satisfactory elemental analysis, FT-IR spectra, CD-spectra and single-crystal X-ray diffraction. They both exhibit sqp topological net, purple fluorescence and SHG activity.展开更多
With the help of in-situ formed CH_3COO- anion, a pair of 3D homochiral coordination polymers with open channels were constructed by the assembly of lactic acid derivative ligands, 1.4-DIB ligands and Cd(II) ions, n...With the help of in-situ formed CH_3COO- anion, a pair of 3D homochiral coordination polymers with open channels were constructed by the assembly of lactic acid derivative ligands, 1.4-DIB ligands and Cd(II) ions, namely [Cd3((R)-CIA)2(CH3CO2)_2(1.4-DIB)2(H2O)2]·x(Guest)(1-D) and [Cd3((S)-CIA)2(CH3CO2)2(1.4-DIB)2(H2O)2]·x(Guest)(1-L). They contain 1D interesting ladder-like Cd-(R)-CIA(3-) chains and exhibit SHG-active behavior and photoluminescent property.展开更多
Homochiral metal-organic frameworks(MOFs)have attracted considerable attention in many fields of research,such as chiral catalysis and chiral chromatography.However,only few homochiral MOFs can be effectively used in ...Homochiral metal-organic frameworks(MOFs)have attracted considerable attention in many fields of research,such as chiral catalysis and chiral chromatography.However,only few homochiral MOFs can be effectively used in capillary electrochromatography(CEC)and their performances are far from adequate.In this study,we successfully synthesized achiral nanocrystalline MIL-53.A facile post-synthetic modification strategy was then implemented to functionalize the product,yielding a homochiral MOF:L-His-NH-MIL-53.This MOF was then employed as a chiral coating in open-tubular CEC mode(OT-CEC),and,as such,it exhibited high enantioselectivities for several racemic drugs.The homochiral MOF and the fabricated capillary coating were systematically characterized using transmission electron microscopy,scanning electron microscopy(with energy-dispersive X-ray spectrometry),Fourier-transform infrared spectroscopy,X-ray diffractometry,thermogravimetric analysis,circular dichroism spectroscopy,Brunauer-Emmett-Teller surface area measurements,and X-ray photoelectron spectroscopy.This study is expected to provide a new strategy for the design and establishment of MOF-based chiral OT-CEC systems.展开更多
Four isostructural lanthanide compounds formulated as {[Ln4(μ3-OH)4(L-asp)3- (H2O)10](ClO4)5·10H2O}n (Ln=Nd (1), Sm (2), Eu (3), Gd (4); asp=aspartic acid) were synthe- sized by a conventional ...Four isostructural lanthanide compounds formulated as {[Ln4(μ3-OH)4(L-asp)3- (H2O)10](ClO4)5·10H2O}n (Ln=Nd (1), Sm (2), Eu (3), Gd (4); asp=aspartic acid) were synthe- sized by a conventional solution reaction. Their structures were characterized by single-crystal X-ray diffraction, IR spectroscopy and elemental analyses (EA). It reveals that they crystallize in the chiral P212121 space group. Their structures feature a homochiral three-dimensional (3D) lan- thanide-organic framework, which contains a cubic [Ln4(μ3-OH)4]8+ cluster sub-building unit (SBU). Additionally, the photoluminescence property of Eu compound was investigated in the solid-state at room temperature.展开更多
The origin of homochirality in living organisms is controversial,stands out of being particularly important and a question which is still not satisfactorily answered.A mental picture of sequence of events that is thou...The origin of homochirality in living organisms is controversial,stands out of being particularly important and a question which is still not satisfactorily answered.A mental picture of sequence of events that is thought to have preceded the existence of chirality in molecules is described.A chemical model to mimic the original abiotic conditions in an attempt to explain the preference of homochirality in living systems was tried.The effect which might have influenced this preference is presented.The surpri...展开更多
What is the most favorite and original chemistry developed in your research group?We originally proposed the design principle for molecular ferroelectrics:ferroelectrochemistry,including quasi-spherical theory,the int...What is the most favorite and original chemistry developed in your research group?We originally proposed the design principle for molecular ferroelectrics:ferroelectrochemistry,including quasi-spherical theory,the introduction of homochirality,and H/F substitution.Ferroelectrochemistry changed the blind search for molecular ferroelectrics into targeted chemical design,which will develop into a new discipline.展开更多
Enantiomerically pure lanthanide(Ⅲ)-based phosphonates are successfully synthesized by using(R)-or(S)-(1-phenylethylamino)-methylphosphonate acid(pempH2),namely,R-or S-[Tb3(pempH2)2(pempH)7]-Cl2·H2O(R-Tb or S-Tb...Enantiomerically pure lanthanide(Ⅲ)-based phosphonates are successfully synthesized by using(R)-or(S)-(1-phenylethylamino)-methylphosphonate acid(pempH2),namely,R-or S-[Tb3(pempH2)2(pempH)7]-Cl2·H2O(R-Tb or S-Tb),crystallizing in chiral space group P212121.Compound R-Tb shows a one-dimensional homochiral triple-stranded helical chain structure where the Tb(III)atoms are bridged by O-P-O units andμ3-O(P)bridge.The thermal analysis,photoluminescence as well as optically active properties of compounds R-Tb and S-Tb have also been investigated.展开更多
Amino acid homochirality, as a unique behavior of life, could have originated synchronously with the genetic code. In this paper, phosphoryl amino-acid -5′-nucleosides with P-N bond are postulated to be a chiral orig...Amino acid homochirality, as a unique behavior of life, could have originated synchronously with the genetic code. In this paper, phosphoryl amino-acid -5′-nucleosides with P-N bond are postulated to be a chiral origin model in prebiotic molecular evolution. The enthalpy change in the intramolecular interaction between the nucleotide base and the amino-acid side-chain determines the sta-bility of the particular complex, resulting in a preferred conformation associated with the chirality of amino acids. Based on the theoretical model, our experiments and calculations show that the chiral selection of the earliest amino acids for L-enantiomers seems to be a strict stereochemi-cal/physicochemical determinism. As other amino acids developed biosynthetically from the earliest amino acids, we infer that the chirality of the later amino acids was inherited from the precursor amino acids. This idea probably goes far back in history, but it is hoped that it will be a guide for further ex-periments in this area.展开更多
Homochirality in life has always been a driving force in scientific research and natural exploration. It has not been satisfactorily explained, and systematic investigations are necessary. This paper reported a homoch...Homochirality in life has always been a driving force in scientific research and natural exploration. It has not been satisfactorily explained, and systematic investigations are necessary. This paper reported a homochiral expression of proteins dependent on the stirring direction of growing media. By controlling the stirring direction clockwise (CW) and anticlockwise (ACW) of the culture medium, proteins with distinct secondary structures were obtained, and D-amino acid may be included in the protein cultured with the stirring direction of ACW. Considering the effect of force fields, which might affect the process of folding and refolding of cellular protein in this report, the control of force fields might be a good way to prepare asymmetric drugs, and the rotational direction of the earth is possibly related to the chirality in primitive life molecules.展开更多
Reacting homochiral (R)-2-methylpiperazine with cobalt sulfate heptahydrate by the solution method in the presence of concentrated sulfuric acid (H2SO4) yielded two coordination compounds (C5H14N2) [CO(H2O)6]...Reacting homochiral (R)-2-methylpiperazine with cobalt sulfate heptahydrate by the solution method in the presence of concentrated sulfuric acid (H2SO4) yielded two coordination compounds (C5H14N2) [CO(H2O)6](SO4)2 (1 and 2). They are polymorphs, but their hydrogen bonds structure differ significantly. Both 1 and 2 crystallize in chiral space group P21 which is related with point group C2, and experimental results suggest that 1 displays ferroelectric behaviors.展开更多
Homochiral metal-organic frameworks(HMOFs) have special properties, such as high surface area, fasci- nating structures and excellent chemical and thermal stability and they have broad application prospects. In this...Homochiral metal-organic frameworks(HMOFs) have special properties, such as high surface area, fasci- nating structures and excellent chemical and thermal stability and they have broad application prospects. In this work, we reported the use of HMOF Co-L-GG(L-GG, dipeptide H-Gly-L-Glu) as the stationary phase for separating race- mates m gas chromatography. Co-L-GG coated fused silica capillary colunm(10 m×250 μm i.d.) was prepared via a dynamic coating method. Thirty racemmes belonging to different classes of organic compounds were resolved in- cluding halohydrocarbons, ketones, esters, ethers, organic acids, epoxyalkanes, alcohols and sulfoxides. When com- pared with the previously reported chiral MOFs-coated capillary colurnlls, the Co-L-GG coated column exhibited broader chiral resolution ability towards chiral compounds.展开更多
Helix as essential molecular chiral phenomenon at supramolecular level offers an affective method to study chiral characteristic of homochiral coordination polymers(CPs).Herein,two homochiral CPs[Cd((R)-CBA)_(2)(3,5-D...Helix as essential molecular chiral phenomenon at supramolecular level offers an affective method to study chiral characteristic of homochiral coordination polymers(CPs).Herein,two homochiral CPs[Cd((R)-CBA)_(2)(3,5-DIT)]_(n)((R)-H_(2) CBA=(R)-4-(1-carboxyethoxy)benzoic acid,3,5-DIT=3,5-di(1 H-imidazol-1-yl)toluene,1-R)and[Zn((R)-CBA)(3,5-DIT)]_(n)(2-R)were synthesized under hydrothermal conditions.In complex 1-R,only a helical chain was built by chiral ligands(R)-CBA2-,ancillary ligands 3,5-DIT and Cd(Ⅱ)ions.After Cd(Ⅱ)ions were replaced by Zn(Ⅱ)ions under similar reaction system,Zn(Ⅱ),(R)-CBA^(2-)and/or 3,5-DIT formed six types of helices,resulting in complex 2-R.So,the metal ions played a key role in the construction of helical structures.Complexes 1-R and 2-R were also characterized by elemental analysis,PXRD,TGA,CD and UV-visible absorptions.In addition,complexes 1-R and 2-R exhibited different photoluminescence behaviors in solid sate compared to free ligand(R)-H_(2)CBA.展开更多
Homochiral cis, cis-; cis,trans- and trans, trans-spiro[4.4]nonane-1,6-diols were prepared via diastereoselective reduction of enantiomerically pure spiro[4.4]nonane-1,6-dione (1) with the corresponding reducing agent...Homochiral cis, cis-; cis,trans- and trans, trans-spiro[4.4]nonane-1,6-diols were prepared via diastereoselective reduction of enantiomerically pure spiro[4.4]nonane-1,6-dione (1) with the corresponding reducing agents: lithium n-butyldiisobutylaluminium hydride for cis,cis-diol (2) with 88% yield; BH3. HF for cis,trans-diol (3) with 91% yield; LiAlH4 for trans,trans-diol (4) with 15% yield.展开更多
A chiral lanthanide metal-organic framework based on enantiopure camphoric acid (D-H2cam), [Nd3(D-cam)8(H2O)4Cl]n (1), has been synthesized and characterized by single-crystal X-ray structural analysis, elemen...A chiral lanthanide metal-organic framework based on enantiopure camphoric acid (D-H2cam), [Nd3(D-cam)8(H2O)4Cl]n (1), has been synthesized and characterized by single-crystal X-ray structural analysis, elemental analysis, IR, thermal gravimetric, and X-ray powder diffraction. Crystal data for the title compound are as follows: orthorhombic system, space group P212121 with a = 13.8287(7), b = 14.0715(7), c = 25.7403(12) A^°, V = 5008.8(4) A^°3, Mr = 1333.08, Z = 4, F(000) = 2644, Dc = 1.768 g/cm^3, μ(MoKα) = 3.189 mm^-1, the final R = 0.0351 and wR = 0.0814 (I 〉 2σ(I)). Compound 1 displays an 8-connected bcu topology 3D framework and hydrogen-bonding interactions stabilize the solid-state structure. The vibrational circular dichroism (VCD) spectrum and second-order nonlinear optical effect of compound 1 have been studied in the solid state.展开更多
One new chiral zeolitic rAo-type metal-organic framework[Cd(L-ala)2]n(l)has been successfully synthesized based on L-alanine chiral ligand,which demonstrates the feasibility of fabricating MOF that integrates the 4-co...One new chiral zeolitic rAo-type metal-organic framework[Cd(L-ala)2]n(l)has been successfully synthesized based on L-alanine chiral ligand,which demonstrates the feasibility of fabricating MOF that integrates the 4-connected zeotype topology by the employment of Z-alanine.To the best of knowledge,it's the first report that metal-organic framework based on amino acid features the chiral zeolitic rho-type structure.Compound 1 was characterized by X-ray powder diffraction,elemental analysis and single-crystal X-ray diffraction.Crystal data:CbH9CdN2O4,Mr=285.55,cubic system,space group/432,a=24.0795(6),V=13961.9(10)A3,Z=48,Dc=1.630 Mg/m3,F(000)=6672,μ(MoKa)=1.865 mm-1,S=1.058,R=0.0271 and wR=0.0312 for 1870 observed reflections with I>2δ(I).The circular dichroism(CD)property of compound 1 was also investigated.展开更多
基金supported by the National Basic Research Program of China(973 Program,2012CB821702)the National Natural Science Foundation of China(21233009 and 21173221)
文摘Two homochiral enantiomorphic 3D coordination polymers: (D-HAPA)2[Cd2Cs(D- HAPA)(m-BDC)4]'(EtOH) (1D) and (L-HAPA)2[Cd2Cs(L-HAPA)(m-BDC)a]'(EtOH) (1L) (APA = 2-amino-l-propanol, m-H2BDC = 1,3-benzenedicarboxylate), have been assembled solvothermally respectively with the induction of enantiomorphic organic small molecules (D,L-APA). 1L and 1I) crystallize in chiral space group P21 with Flack parameters of-0.012(13) and -0.07(3), respectively, and have been characterized by satisfactory elemental analysis, FT-IR spectra, CD-spectra and single-crystal X-ray diffraction. They both exhibit sqp topological net, purple fluorescence and SHG activity.
基金supported by the Natural Science Foundation of Guizhou Province(20122344)125 program of Guizhou Education Department(2012015)the Doctoral Scientific Fund of Zunyi Normal College(2012BSJJ12)
文摘With the help of in-situ formed CH_3COO- anion, a pair of 3D homochiral coordination polymers with open channels were constructed by the assembly of lactic acid derivative ligands, 1.4-DIB ligands and Cd(II) ions, namely [Cd3((R)-CIA)2(CH3CO2)_2(1.4-DIB)2(H2O)2]·x(Guest)(1-D) and [Cd3((S)-CIA)2(CH3CO2)2(1.4-DIB)2(H2O)2]·x(Guest)(1-L). They contain 1D interesting ladder-like Cd-(R)-CIA(3-) chains and exhibit SHG-active behavior and photoluminescent property.
基金funded by the National Natural Science Foundation of China(Grant No.:82003705).
文摘Homochiral metal-organic frameworks(MOFs)have attracted considerable attention in many fields of research,such as chiral catalysis and chiral chromatography.However,only few homochiral MOFs can be effectively used in capillary electrochromatography(CEC)and their performances are far from adequate.In this study,we successfully synthesized achiral nanocrystalline MIL-53.A facile post-synthetic modification strategy was then implemented to functionalize the product,yielding a homochiral MOF:L-His-NH-MIL-53.This MOF was then employed as a chiral coating in open-tubular CEC mode(OT-CEC),and,as such,it exhibited high enantioselectivities for several racemic drugs.The homochiral MOF and the fabricated capillary coating were systematically characterized using transmission electron microscopy,scanning electron microscopy(with energy-dispersive X-ray spectrometry),Fourier-transform infrared spectroscopy,X-ray diffractometry,thermogravimetric analysis,circular dichroism spectroscopy,Brunauer-Emmett-Teller surface area measurements,and X-ray photoelectron spectroscopy.This study is expected to provide a new strategy for the design and establishment of MOF-based chiral OT-CEC systems.
基金supported by the Science and Technology Department of Guizhou Province (No. J[2010]2121)Zunyi Science and Technology Bureau (No. [2010]04)
文摘Four isostructural lanthanide compounds formulated as {[Ln4(μ3-OH)4(L-asp)3- (H2O)10](ClO4)5·10H2O}n (Ln=Nd (1), Sm (2), Eu (3), Gd (4); asp=aspartic acid) were synthe- sized by a conventional solution reaction. Their structures were characterized by single-crystal X-ray diffraction, IR spectroscopy and elemental analyses (EA). It reveals that they crystallize in the chiral P212121 space group. Their structures feature a homochiral three-dimensional (3D) lan- thanide-organic framework, which contains a cubic [Ln4(μ3-OH)4]8+ cluster sub-building unit (SBU). Additionally, the photoluminescence property of Eu compound was investigated in the solid-state at room temperature.
文摘The origin of homochirality in living organisms is controversial,stands out of being particularly important and a question which is still not satisfactorily answered.A mental picture of sequence of events that is thought to have preceded the existence of chirality in molecules is described.A chemical model to mimic the original abiotic conditions in an attempt to explain the preference of homochirality in living systems was tried.The effect which might have influenced this preference is presented.The surpri...
基金supported by the National Natural Science Foundation of China(21991142,21831004,91856114,and 22175082)。
文摘What is the most favorite and original chemistry developed in your research group?We originally proposed the design principle for molecular ferroelectrics:ferroelectrochemistry,including quasi-spherical theory,the introduction of homochirality,and H/F substitution.Ferroelectrochemistry changed the blind search for molecular ferroelectrics into targeted chemical design,which will develop into a new discipline.
基金supported financially by Jiangsu Higher Education Institutions of China (18KJB150030)。
文摘Enantiomerically pure lanthanide(Ⅲ)-based phosphonates are successfully synthesized by using(R)-or(S)-(1-phenylethylamino)-methylphosphonate acid(pempH2),namely,R-or S-[Tb3(pempH2)2(pempH)7]-Cl2·H2O(R-Tb or S-Tb),crystallizing in chiral space group P212121.Compound R-Tb shows a one-dimensional homochiral triple-stranded helical chain structure where the Tb(III)atoms are bridged by O-P-O units andμ3-O(P)bridge.The thermal analysis,photoluminescence as well as optically active properties of compounds R-Tb and S-Tb have also been investigated.
基金Supported by the National Natural Science Foundation of China (Grant No. 20572061)the Science Foundation of Xiamen University (Grant No. Z03120)
文摘Amino acid homochirality, as a unique behavior of life, could have originated synchronously with the genetic code. In this paper, phosphoryl amino-acid -5′-nucleosides with P-N bond are postulated to be a chiral origin model in prebiotic molecular evolution. The enthalpy change in the intramolecular interaction between the nucleotide base and the amino-acid side-chain determines the sta-bility of the particular complex, resulting in a preferred conformation associated with the chirality of amino acids. Based on the theoretical model, our experiments and calculations show that the chiral selection of the earliest amino acids for L-enantiomers seems to be a strict stereochemi-cal/physicochemical determinism. As other amino acids developed biosynthetically from the earliest amino acids, we infer that the chirality of the later amino acids was inherited from the precursor amino acids. This idea probably goes far back in history, but it is hoped that it will be a guide for further ex-periments in this area.
基金support from the Major State Basie Research Development Program (Grant No. 2006CB933100)the National Natural Science Foundation of China (Grant No. 90813019)
文摘Homochirality in life has always been a driving force in scientific research and natural exploration. It has not been satisfactorily explained, and systematic investigations are necessary. This paper reported a homochiral expression of proteins dependent on the stirring direction of growing media. By controlling the stirring direction clockwise (CW) and anticlockwise (ACW) of the culture medium, proteins with distinct secondary structures were obtained, and D-amino acid may be included in the protein cultured with the stirring direction of ACW. Considering the effect of force fields, which might affect the process of folding and refolding of cellular protein in this report, the control of force fields might be a good way to prepare asymmetric drugs, and the rotational direction of the earth is possibly related to the chirality in primitive life molecules.
基金funded by the National Natural Science Foundation of China(No.21201087)Jiangsu Province NSF BK20131244+2 种基金the Foundation of Jiangsu Educational Committee (No.11KJB150004)sponsored by Qing Lan Project of Jiangsu provinceJiangsu Overseas Research & Training Program for University Prominent Young & Middle-aged Teacher and Presidents
文摘Reacting homochiral (R)-2-methylpiperazine with cobalt sulfate heptahydrate by the solution method in the presence of concentrated sulfuric acid (H2SO4) yielded two coordination compounds (C5H14N2) [CO(H2O)6](SO4)2 (1 and 2). They are polymorphs, but their hydrogen bonds structure differ significantly. Both 1 and 2 crystallize in chiral space group P21 which is related with point group C2, and experimental results suggest that 1 displays ferroelectric behaviors.
基金Supported by the National Natural Science Foundation of China(No.21275126).
文摘Homochiral metal-organic frameworks(HMOFs) have special properties, such as high surface area, fasci- nating structures and excellent chemical and thermal stability and they have broad application prospects. In this work, we reported the use of HMOF Co-L-GG(L-GG, dipeptide H-Gly-L-Glu) as the stationary phase for separating race- mates m gas chromatography. Co-L-GG coated fused silica capillary colunm(10 m×250 μm i.d.) was prepared via a dynamic coating method. Thirty racemmes belonging to different classes of organic compounds were resolved in- cluding halohydrocarbons, ketones, esters, ethers, organic acids, epoxyalkanes, alcohols and sulfoxides. When com- pared with the previously reported chiral MOFs-coated capillary colurnlls, the Co-L-GG coated column exhibited broader chiral resolution ability towards chiral compounds.
基金the National Natural Science Foundation of China(No.21761036)。
文摘Helix as essential molecular chiral phenomenon at supramolecular level offers an affective method to study chiral characteristic of homochiral coordination polymers(CPs).Herein,two homochiral CPs[Cd((R)-CBA)_(2)(3,5-DIT)]_(n)((R)-H_(2) CBA=(R)-4-(1-carboxyethoxy)benzoic acid,3,5-DIT=3,5-di(1 H-imidazol-1-yl)toluene,1-R)and[Zn((R)-CBA)(3,5-DIT)]_(n)(2-R)were synthesized under hydrothermal conditions.In complex 1-R,only a helical chain was built by chiral ligands(R)-CBA2-,ancillary ligands 3,5-DIT and Cd(Ⅱ)ions.After Cd(Ⅱ)ions were replaced by Zn(Ⅱ)ions under similar reaction system,Zn(Ⅱ),(R)-CBA^(2-)and/or 3,5-DIT formed six types of helices,resulting in complex 2-R.So,the metal ions played a key role in the construction of helical structures.Complexes 1-R and 2-R were also characterized by elemental analysis,PXRD,TGA,CD and UV-visible absorptions.In addition,complexes 1-R and 2-R exhibited different photoluminescence behaviors in solid sate compared to free ligand(R)-H_(2)CBA.
基金Project(29572068)supported by the National Natural Science Foundation of China.
文摘Homochiral cis, cis-; cis,trans- and trans, trans-spiro[4.4]nonane-1,6-diols were prepared via diastereoselective reduction of enantiomerically pure spiro[4.4]nonane-1,6-dione (1) with the corresponding reducing agents: lithium n-butyldiisobutylaluminium hydride for cis,cis-diol (2) with 88% yield; BH3. HF for cis,trans-diol (3) with 91% yield; LiAlH4 for trans,trans-diol (4) with 15% yield.
基金supported by National Natural Science Foundation of China(21401147)Basic Research Program of Natural Science from Shaanxi Provincial Government(2015JQ2032)+2 种基金Scientific Research Program from Education Department of Shaanxi Provincial Government(2013JK0654)Opening Foundation from State Key Laboratory of Coordination Chemistry in Nanjing University(201219)the Program for Distinguished Young Scholars of Xi’an Polytechnic University(201403)
文摘A chiral lanthanide metal-organic framework based on enantiopure camphoric acid (D-H2cam), [Nd3(D-cam)8(H2O)4Cl]n (1), has been synthesized and characterized by single-crystal X-ray structural analysis, elemental analysis, IR, thermal gravimetric, and X-ray powder diffraction. Crystal data for the title compound are as follows: orthorhombic system, space group P212121 with a = 13.8287(7), b = 14.0715(7), c = 25.7403(12) A^°, V = 5008.8(4) A^°3, Mr = 1333.08, Z = 4, F(000) = 2644, Dc = 1.768 g/cm^3, μ(MoKα) = 3.189 mm^-1, the final R = 0.0351 and wR = 0.0814 (I 〉 2σ(I)). Compound 1 displays an 8-connected bcu topology 3D framework and hydrogen-bonding interactions stabilize the solid-state structure. The vibrational circular dichroism (VCD) spectrum and second-order nonlinear optical effect of compound 1 have been studied in the solid state.
基金supported financially by National Natural Science Foundation of China(No.21601080)
文摘One new chiral zeolitic rAo-type metal-organic framework[Cd(L-ala)2]n(l)has been successfully synthesized based on L-alanine chiral ligand,which demonstrates the feasibility of fabricating MOF that integrates the 4-connected zeotype topology by the employment of Z-alanine.To the best of knowledge,it's the first report that metal-organic framework based on amino acid features the chiral zeolitic rho-type structure.Compound 1 was characterized by X-ray powder diffraction,elemental analysis and single-crystal X-ray diffraction.Crystal data:CbH9CdN2O4,Mr=285.55,cubic system,space group/432,a=24.0795(6),V=13961.9(10)A3,Z=48,Dc=1.630 Mg/m3,F(000)=6672,μ(MoKa)=1.865 mm-1,S=1.058,R=0.0271 and wR=0.0312 for 1870 observed reflections with I>2δ(I).The circular dichroism(CD)property of compound 1 was also investigated.