Zhang Xiao-Yu, Zhao Shu-Man, Li Ran, Xu Zou-Hong, Wang Min-Yan, Jiang Yu-Fei, Chen Kai, Zhao Yue, Sun Wei-Yin
Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing National Laboratory of Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210023, China.
Dalton Trans. 2021 Mar 28;50(12):4408-4414. doi: 10.1039/d0dt04428h. Epub 2021 Mar 11.
Two complexes, namely [Zn(bpeb)(sda)] (1) and [Zn(poly-bpeb)(sda)] (2), were synthesized by an organic ligand with an extensively conjugated system, bpeb = 1,4-bis[2-(3-pyridyl) vinyl]-benzene, Hsda = sulfonyldibenzoic acid and d metal centers Zn. Structural analysis revealed that compound 1 was nonporous and possessed 7-fold interpenetrated three-dimensional (3D) frameworks constructed from one-dimensional (1D) Zn-bpeb and Zn-sda chains. Interestingly, due to the short distance between the vinyl groups from two neighboring bpeb ligands, compound 1 could undergo a photochemical [2 + 2] polymerization reaction to generate 2 in a single-crystal to single-crystal (SCSC) manner under the irritation of UV. Moreover, the organic polymer in 2 could be depolymerized by heating to realize the reversible transformation from 2 to 1. Furthermore, both compounds 1 and 2 could be used as fluorescent sensors for 2,4,6-trinitrophenol (TNP) with high selectivity and sensitivity.
通过具有广泛共轭体系的有机配体合成了两种配合物，即[Zn(bpeb)(sda)]（1）和[Zn(poly-bpeb)(sda)]（2），其中bpeb = 1,4-双[2-(3-吡啶基)乙烯基]-苯，Hsda = 磺酰基二苯甲酸，金属中心为Zn。结构分析表明，化合物1是无孔的，具有由一维（1D）Zn-bpeb和Zn-sda链构成的7重互穿三维（3D）框架。有趣的是，由于两个相邻bpeb配体的乙烯基之间距离较短，化合物1在紫外光照射下可通过光化学[2 + 2]聚合反应以单晶到单晶（SCSC）的方式生成2。此外，通过加热可使2中的有机聚合物解聚，实现从2到1的可逆转变。此外，化合物1和2都可用作2,4,6-三硝基苯酚（TNP）的荧光传感器，具有高选择性和高灵敏度。
