Modulating the regioselectivity of solid-state photodimerization in coordination polymer crystals
作者:Fei-Long Hu、Zhen Qin、Meng-Fan Wang、Xue Wan Kang、Yong-Li Qin、Yong Wang、Shu-Li Chen、David James Young、Yan Mi
DOI:10.1039/d0dt02038a
日期:——
1H-Indazole-3-carboxylic acid; H3L3, benzene-1,2,3-tricarboxylic acid; 1,4-bpeb, 1,4-bis[2-(4-pyridyl)vinyl]benzene have been synthesized under solvothermal conditions. Complexes 1–3 underwent photodimerization in the solid-state to give quantitative yields of single isomeric products. The choice of carboxyl ligands L and metal center determined the arrangement of 1,4-bpeb ligands, which in turn directed
配位聚合物[Cd(1,4-bpeb)(L 1)](1),[Zn 2(1,4-bpeb)2(L 2)2(SO 4 2-)2 ](2)和[Cd (1,4- BPEB)(L 3)](H 2 O)(3)(H 2大号1,3- [2-(3-羟基-苯氧基甲基) -苄氧基] -苯甲酸; HL 2,1个ħ -吲哚-3-羧酸; H 3 L 3,苯-1,2,3-三羧酸; 1,4-bpeb,1,4-双[2-(4-吡啶基)乙烯基]苯溶剂热条件。1–3在固态下进行了光二聚化,以定量获得单个异构体产物。羧基配体L和金属中心的选择决定了1,4-bpeb配体的排列方式,这又决定了最终光产物的区域化学。镉基1和3的固态网络结构具有1,4-bpeb对,与每个配体中的两个C C中心面对面排列,且距离合适,并进行了光二聚化排列以给出相应的对位[2.2]环烷(p CP)排他地。相比之下,化合物2具有双核(ZnSO 4)2将1,4 bpeb的“臂”面对面放置的金属环,但C