Among various chiral compounds, semirigid lactic acid derivatives modified from lactic acids have been attractive synthons for the synthesis of chiral coordination polyers (CPs). Herein, lactic acid derivative (R)-4-(1-carboxyethoxy) benzoic acid ((R)-H₂CBA) was used to reacted with Co(Ⅱ) ions and auxiliary ligands to obtain two chiral CPs, namely [Co₂((R)-CBA)₂(2,5-DIP)₂]_n (1, 2,5-DIP ​= ​2,5-bis(2-methyl-1H-imidazole-1-yl)pyridine) and [Co((R)-CBA)(1,3-DIB) _1.5]_n (2, 1,3-DIB ​= ​1,3-di(1H-imidazole-1-yl)benzene). Although two complexes were synthesized under the similar condition, their structural motifs are still very different. Complex 1 has pillared-layer framework with 6-connected mab net and two types of helixes, while complex 2 is 3D supra molecule framework packed by 2D helical layers. UV/vis spectra, Mott-Schottky measurements and electrochemical impedance spectroscopy revealed complexes 1 and 2 are typical n-type semiconductors with low resistance in charge transportation and high charge-separation efficiency. Under UV irradiation, complexes 1 and 2 showed good photocatalytic activity in the degradation of methylene blue. The photocatalytic experiments confirmed that the conversion of MB was up to 88% for 1 and 73% for 2 after 3 ​h, respectively.

在各种手性化合物中，从乳酸改性的半刚性乳酸衍生物是用于合成手性配位多聚体（CP）的有吸引力的合成子。在此，使用乳酸衍生物（R）-4-（1-羧基乙氧基）苯甲酸（（R）-H ₂ CBA）与Co（Ⅱ）离子和辅助配体反应，得到两个手性CP，即[Co ₂（（[R）-CBA）₂（2,5-DIP）₂ ] _ñ（1，2,5- DIP = 2,5-双（2-甲基-1H-咪唑-1-基）吡啶）和[Co（（R）-CBA）（1,3-DIB）_1.5 ] _n（2，1,3-DIB = 1,3-二（1H-咪唑-1-基）苯）。尽管在相似的条件下合成了两种复合物，但它们的结构基序仍然非常不同。配合物1具有带有6个连接的mab网和两种类型的螺旋的柱状层框架，而配合物2是由2D螺旋层填充的3D超分子框架。UV / vis光谱，Mott-Schottky测量和电化学阻抗谱显示，配合物1和2是典型的n型半导体，在电荷传输中电阻低，电荷分离效率高。在紫外线照射下，配合物1和2在亚甲基蓝的降解中显示出良好的光催化活性。光催化实验证实3 h后MB的转化率分别为1的88％和2的73％。