Assembly of a Zn(<scp>ii</scp>) coordination polymer of tetrapyridyl tetraene ligands for selective sensing of CrO<sub>4</sub><sup>2−</sup> and Fe<sup>3+</sup> in water <i>via</i> luminescence quenching and enhancement
作者:Zhan-Yong Yang、Chen Cao、Xiao Sang、Yu-Xuan Hong、Hong Yu、Chun-Yan Ni、Jian-Ping Lang
DOI:10.1039/d1ce01706c
日期:——
revealed to be an intriguing luminescent probe for CrO42− anions in H2O by a selective fluorescence quenching method or Fe3+ ions in H2O by selective fluorescence enhancement. The detection limit was 0.679 ppm for CrO42− or 0.429 ppm for Fe3+. The emission quenching process may be ascribed to the overlap between the absorption band of the CrO42− anion and those of the excitation and/or emission bands of
四种 Zn( II ) 基配位聚合物 (CP)、[Zn(4-tkpvb)(FB) 2 ] ( CP1 )、[Zn(4-tkpvb)(CB) 2 ] ( CP2 )、[Zn(4- tkpvb)(BB) 2 ] ( CP3 ) 和 [Zn(4-tkpvb)(NTP)] n ( CP4 ) 由 Zn(NO 3 ) 2 ·6H 2 O 与 1,2,4 的溶剂热反应制备,在 3-氟苯甲酸( HFB )、3-氯苯甲酸 (HCB)、3-溴苯甲酸 ( HBB) 和硝基对苯二甲酸 (H 2NTP)。通过红外光谱、元素分析、粉末X射线衍射和单晶X射线衍射对这四种化合物进行了结构表征。CP1 – CP3具有相似的一维 (1D) 锯齿形链结构,由连接 [ZnL 2 ] (L = FB, CB, BB) 单元的 4-tkpvb 组装而成。CP4展示了一个不寻常的 6 重互穿三维 (3D) 网络,其具有通过4-tkpvb