Phadungsak Natthakorn, Kielar Filip, Dungkaew Winya, Sukwattanasinitt Mongkol, Zhou Yan, Chainok Kittipong
Materials and Textile Technology, Faculty of Science and Technology, Thammasat University, Klong Luang, Pathum Thani 12121, Thailand.
Department of Chemistry, Faculty of Science, Naresuan University, Muang, Phitsanulok 65000, Thailand.
Acta Crystallogr C Struct Chem. 2019 Oct 1;75(Pt 10):1372-1380. doi: 10.1107/S2053229619011987. Epub 2019 Sep 6.
Over the past two decades, the development of novel inorganic-organic hybrid porous crystalline materials or metal-organic frameworks (MOFs) using crystal engineering has provoked significant interest due to their potential applications as functional materials. In this context, luminescent MOFs as fluorescence sensors have recently received significant attention for the sensing of ionic species and small molecules. In this work, a new luminescent heterometallic zinc(II)-barium(II)-based anionic metal-organic framework, namely poly[imidazolium [triaqua(μ-benzene-1,3,5-tricarboxylato)bariumtrizinc] tetrahydrate], {(CHN)[BaZn(CHO)(HO)]·4HO} (1), was synthesized under hydrothermal conditions and characterized. Compound 1 presents a three-dimensional framework with an unprecedented (3,5)-connected topology of the point symbol (3.9).(3.4.5.9.10), and exhibits `turn-off' luminescence responses for the Cu and Fe ions in aqueous solution based on significantly different quenching mechanisms.
在过去二十年中，利用晶体工程开发新型无机-有机杂化多孔晶体材料或金属有机框架（MOF）因其作为功能材料的潜在应用而引起了极大关注。在此背景下，发光MOF作为荧光传感器最近在离子物种和小分子传感方面受到了广泛关注。在这项工作中，合成了一种基于锌（II）-钡（II）的新型发光异金属阴离子金属有机框架，即聚[咪唑鎓[三水合（μ-苯-1,3,5-三羧酸根）钡三锌]四水合物]，{(CHN)[BaZn(CHO)(HO)]·4HO} (1)，并对其进行了水热条件下的合成与表征。化合物1呈现出具有点符号为(3.9).(3.4.5.9.10)的前所未有的(3,5)-连接拓扑结构的三维框架，并基于显著不同的猝灭机制对水溶液中的铜离子和铁离子表现出“关断”发光响应。
