Molecular Materials Laboratory, Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560064, India.
Inorg Chem. 2012 Oct 1;51(19):10089-91. doi: 10.1021/ic3017547. Epub 2012 Sep 18.
A three-dimensional luminescent metal-organic framework, {Mg(DHT)(DMF)(2)}(n) (1), based on an excited-state intramolecular proton-transfer (ESIPT) responsive linker, 2,5-dihydroxyterephthalic acid (H(2)DHT), has been synthesized, and its desolvated microporous framework with pendent -OH groups on the pore surface was exploited for the binding and specific sensing of metal ions via Lewis acid-base interactions. The luminescence intensity significantly quenches with Cu(II) among various s- and d-block metal ions, and highly selective sensing of Cu(II) ions has been realized in both solid and solution states (up to nanomolar concentration). The immobilized Cu(II) metal ions can be selectively removed by chelating agents like ethylenediaminetetraacetic acid without any structural disintegration of the framework, as revealed by the luminescence and gas-adsorption studies.
一种基于激发态分子内质子转移（ESIPT）响应配体 2,5-二羟基对苯二甲酸（H2DHT）的三维发光金属有机骨架{Mg(DHT)(DMF)(2)}（n）（1）被合成出来，其具有悬垂 -OH 基团的脱溶剂微孔骨架，可通过路易斯酸碱相互作用对金属离子进行结合和特异性感应。在各种 s-和 d-区金属离子中，发光强度显著猝灭于 Cu(II)，在固态和溶液状态下（高达纳摩尔浓度）实现了对 Cu(II)离子的高选择性感应。通过螯合剂如乙二胺四乙酸可以选择性地去除固定化的 Cu(II)金属离子，而不会导致骨架结构的任何破坏，这一点通过发光和气体吸附研究得到了证实。
