Tsai Meng-Jung, Liao Kuo-Shun, Wu Jing-Yun
Department of Applied Chemistry, National Chi Nan University, Nantou 545, Taiwan.
Nanomaterials (Basel). 2022 Jan 3;12(1):158. doi: 10.3390/nano12010158.
Reactions of ZnSO∙7HO, -(pyridin-3-ylmethyl)-4-(pyridin-4-yl)-1,8-naphthalimide (NI-mbpy-34), and 5-bromobenzene-1,3-dicarboxylic acid (Br-1,3-Hbdc) afforded a luminescent coordination polymer, [Zn(Br-1,3-bdc)(NI-mbpy-34)] (), under hydro(solvo)thermal conditions. Single-crystal X-ray structure analysis revealed that features a three-dimensional (3-D) 2-fold interpenetrating (or CdSO) net topology with the point symbol of (6·8), where the Zn(II) centers are considered as 4-connected square-planar nodes. X-ray powder diffraction (XRPD) patterns and thermogravimetric (TG) analysis confirmed that shows high chemical and thermal stabilities. Notably, displayed solvent dependent photoluminescence properties; the fluorescence intensity and emission maximum of in different solvent suspensions varied when a solvent was changed. Furthermore, the HO suspension of exhibited blue fluorescence emission and thus can be treated as a selective and sensitive fluorescent probe for turn-on detection of Cr cations through absorbance caused enhancement (ACE) mechanism and turn-off detection of CrO/CrO anions through collaboration of the absorption competition and energy transfer process, with limit of detection (LOD) as low as μM scale.
硫酸锌七水合物（ZnSO₄∙7H₂O）、4-(吡啶-4-基)-N-(吡啶-3-基甲基)-1,8-萘二甲酰亚胺（NI-mbpy-34）与5-溴苯-1,3-二羧酸（Br-1,3-Hbdc）在水（溶剂）热条件下反应生成了一种发光配位聚合物[Zn(Br-1,3-bdc)(NI-mbpy-34)]（）。单晶X射线结构分析表明，其具有三维（3-D）2重互穿的（或CdSO₄）网络拓扑结构，点符号为(6⁴·8²)，其中Zn(II)中心被视为4连接的平面正方形节点。X射线粉末衍射（XRPD）图谱和热重（TG）分析证实，该聚合物具有高化学稳定性和热稳定性。值得注意的是，该聚合物表现出溶剂依赖性光致发光性质；当改变溶剂时，其在不同溶剂悬浮液中的荧光强度和发射最大值会发生变化。此外，该聚合物的水悬浮液表现出蓝色荧光发射，因此可作为一种选择性和灵敏的荧光探针，通过吸收增强（ACE）机制对Cr³⁺阳离子进行开启检测，并通过吸收竞争和能量转移过程的协同作用对Cr₂O₇²⁻/CrO₄²⁻阴离子进行关闭检测，检测限低至微摩尔级别。
