Halogen substituted β-amino acids, D,L-3-amino-3-（4-fluoro）phenylpropionic acid（D,L-HL1, 1） and D,L-3-amino-3-（4-bromo）phenylpropionic acid（D,L-HL2, 2）, as well as their Cu（II） coordination complexes [Cu（L...Halogen substituted β-amino acids, D,L-3-amino-3-（4-fluoro）phenylpropionic acid（D,L-HL1, 1） and D,L-3-amino-3-（4-bromo）phenylpropionic acid（D,L-HL2, 2）, as well as their Cu（II） coordination complexes [Cu（L1）2（CH3OH）2].2CH3OH（3） and [Cu（L2）2（CH3OH）2]-2CHaOH（4） were investigated and their single crystal structures were discussed in details. Supramolecular helical chains were found in β-amino acids 1 and 2 while there was no helix in their coordination complexes 3 and 4. The formation of supramolecular helixes could be due to the hydrogen bonds between terminal -NH3＋ and adjacent -COO- in β-amino acids 1 and 2. While, this kind of hydrogen bonds could not be observed in their Cu（II） coordination complexes 3 and 4, in which central-symmetrical dimers could be formed via coplanar coordinated bonds（N-Cu-O） between -NH2 and -COO-.展开更多
Two new alkaline metal borates containing 1D{B5}/{B6}oxoboron helical chains,namely Na0.5[B5O8(OH)2]0.5[B5O6(OH)2]0.5·0.5H3O(1)and NaKCs[B6O9(OH)3](2)were synthesized under solvothermal conditions.Compound 1 cont...Two new alkaline metal borates containing 1D{B5}/{B6}oxoboron helical chains,namely Na0.5[B5O8(OH)2]0.5[B5O6(OH)2]0.5·0.5H3O(1)and NaKCs[B6O9(OH)3](2)were synthesized under solvothermal conditions.Compound 1 contains the interesting alternative left-and right-handed helical{[B5O8(OH)2][B5O6(OH)2]}2-({B5}-1 and{B5}-2)1D chains and compound 2 possesses the similar[B6O11(OH)3]7-({B6})chains.Their 1D chains are further assembled into 2D layers and 3D supramolecular frameworks through O-H…O hydrogen bonds.In addition,the UV cutoff edge of compounds 1 and 2 is both below 190 nm.展开更多
基金Supported by the National Natural Science Foundation of China（Nos.21071018, 21271026）.
文摘Halogen substituted β-amino acids, D,L-3-amino-3-（4-fluoro）phenylpropionic acid（D,L-HL1, 1） and D,L-3-amino-3-（4-bromo）phenylpropionic acid（D,L-HL2, 2）, as well as their Cu（II） coordination complexes [Cu（L1）2（CH3OH）2].2CH3OH（3） and [Cu（L2）2（CH3OH）2]-2CHaOH（4） were investigated and their single crystal structures were discussed in details. Supramolecular helical chains were found in β-amino acids 1 and 2 while there was no helix in their coordination complexes 3 and 4. The formation of supramolecular helixes could be due to the hydrogen bonds between terminal -NH3＋ and adjacent -COO- in β-amino acids 1 and 2. While, this kind of hydrogen bonds could not be observed in their Cu（II） coordination complexes 3 and 4, in which central-symmetrical dimers could be formed via coplanar coordinated bonds（N-Cu-O） between -NH2 and -COO-.
基金Supported by the National Natural Science Foundation of China(Nos.21571016,21831001 and 91122028)the National Natural Science Foundation of China for Distinguished Young Scholars(No.20725101).
文摘Two new alkaline metal borates containing 1D{B5}/{B6}oxoboron helical chains,namely Na0.5[B5O8(OH)2]0.5[B5O6(OH)2]0.5·0.5H3O(1)and NaKCs[B6O9(OH)3](2)were synthesized under solvothermal conditions.Compound 1 contains the interesting alternative left-and right-handed helical{[B5O8(OH)2][B5O6(OH)2]}2-({B5}-1 and{B5}-2)1D chains and compound 2 possesses the similar[B6O11(OH)3]7-({B6})chains.Their 1D chains are further assembled into 2D layers and 3D supramolecular frameworks through O-H…O hydrogen bonds.In addition,the UV cutoff edge of compounds 1 and 2 is both below 190 nm.
