基于半刚性对映配体的螺旋单一手性配位聚合物

在辅助配体3-(2-甲基-1H-咪唑-1-基)-5-(5-甲基-1H-咪唑-1-基)吡啶(MIMIP)的辅助下， 乳酸衍生物(R)-4-(1-羧基乙氧基)苯甲酸((R)-H₂CBA)和(S)-4-(1-羧基乙氧基)苯甲酸((S)-H₂CBA)分别与Cd(Ⅱ)通过溶剂热反应得到一对结构新颖的单一手性配位聚合物-Cd((R)-CBA)(MIMIP)\]·H₂O (1-R)和Cd((S)-CBA)(MIMIP)]·H₂O (1-S), 并测试两个配合物的粉末衍射光谱、 热稳定性、 紫外-可见吸收光谱和荧光性质.  结果表明： 1-R和1-S均结晶于单斜的P2₁2₁2₁空间群， 具有三维超分子框架的对映体； 在1-R中， (R)-CBA^2-和MIMIP分别与Cd(Ⅱ)沿b轴形成两种右手螺旋链， 在1-S中， (S)-CBA^2-和MIMIP与Cd(Ⅱ)形成对映的左手螺旋链；  (R)-CBA^2-和MIMIP与Cd(Ⅱ)在1-R中形成左手螺旋链，(R)-CBA^2-和MIMIP与Cd(Ⅱ)在1-S中形成对映的右手螺旋链.

Homochiral Coordination Polymers Based on Semirigid Enantiomers

With the help of auxiliary N-donor ligand 3-(2-methyl-1H-imidazol-1-yl)-5-(5-methyl-1H-imidazo-1-yl)pyridine (MIMIP)，  a pair of novel homochiral coordination polymers (HCPs) Cd((R)-CBA)(MIMIP)]·H₂O (1-R) and Cd((S)-CBA)(MIMIP)\]·H₂O (1-S) were  synthesized by solvothermal reaction of  lactic derivatives (R)-4-(1-carboxyethoxy) benzoic acid ((R)-H₂CBA) and (S)-4-(1-carboxyethoxy)benzoic acid ((S)-H₂CBA)  with Cd(Ⅱ) ions, and the powder X-ray diffraction (PXRD), thermostability, UV-Vis absorption spectra and photoluminescent properties of two complexes were tested.   The results show that both 1-R and 1-S crystallized in the monoclinic  P2₁2₁2₁ space group and have 3D supramolecular framework enantiomers. In complex  1-R，  (R)-CBA^2- and MIMIP are linked by Cd(Ⅱ) ions to form two kinds of right-handed helical chains along b-axis，  respectively，   the enantiomeric left-handed helical chains exists in complex  1-S.   (R)/(S)\|CBA^2- and   MIMIP are linked by  Cd(Ⅱ) ions  to form the third helix in complexes 1-R and 1-S along b-axis.