Zhang Hang, Wang Jia-Chen, Jiang Wei, Zhao Si-Si
Institute of Catalysis for Energy and Environment, College of Chemistry & Chemical Engineering, Shenyang Normal University Shenyang 110034 P. R. China
College of Environmental Science and Engineering, Jilin Normal University Siping 136000 P. R. China.
RSC Adv. 2019 Jan 28;9(7):3647-3652. doi: 10.1039/c8ra09777a. eCollection 2019 Jan 25.
By utilizing a novel octacarboxylate-functionalized resorcin[4]arene as organic linkers, three lanthanide-coordination polymers, namely, [(CH)NH][Ln(HL)(HO)]·2HO (Ln = Tb (1), Eu (2) and Gd (3), HL = 2,8,14,20-tetra-pentyl-4,6,10,12,16,18,22,24-octa-carboxymethoxy-resorcin[4]arene) have been solvothermally synthesized and structurally characterized. Isostructural 1-3 display unique two dimensional sandwich-based layers built with Ln cations and bowl-shaped HL anions. Remarkably, 1 and 2 produce intensive green and red emissions respectively and long lifetimes thanks to the antenna effect of HL anions. The energy level testing of 3 indicates that the newly designed ligand HL has a very efficient intersystem crossing process. More importantly, luminescent investigations reveal that 1 and 2 can selectively detect ,'-dimethylformamide and Fe ions with turn-on-type and turn-off-type responses, respectively.
通过使用一种新型的八羧基官能化间苯二酚[4]芳烃作为有机连接体，溶剂热合成并表征了三种镧系配位聚合物，即[(CH)NH][Ln(HL)(HO)]·2HO（Ln = Tb (1)、Eu (2) 和 Gd (3)，HL = 2,8,14,20-四戊基-4,6,10,12,16,18,22,24-八羧甲氧基间苯二酚[4]芳烃）。同构的1-3呈现出由Ln阳离子和碗状HL阴离子构建的独特二维夹心基层。值得注意的是，由于HL阴离子的天线效应，1和2分别产生强烈的绿色和红色发射以及长寿命。3的能级测试表明新设计的配体HL具有非常有效的系间窜越过程。更重要的是，发光研究表明1和2可以分别通过开启型和关闭型响应选择性地检测N,N'-二甲基甲酰胺和铁离子。
