Li Jinxue, Zhang Nanxi, Yuan Ye, Li Xiangyu, Wu Maoquan, Yang Qingfeng, Yu Xiaoyang, Zhang Xiao, Wang Yan
MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, People's Republic of China.
School of Life Science and Technology, Harbin Institute of Technology, Harbin, People's Republic of China.
Spectrochim Acta A Mol Biomol Spectrosc. 2020 Dec 5;242:118790. doi: 10.1016/j.saa.2020.118790. Epub 2020 Aug 5.
A new luminescence Cd(II)-MOF (1) ([Cd(BTC)(TPT)(HO)]·4HO, TPT = tris(4-pyridyl)triazine, HBTC = 1,3,5-benzenetricarboxylic acid) was successfully synthesized under solvothermal conditions. 1 contains 3D framework which consist of Cd atoms and btc anions with the large channels along c axis. Then, tpt ligands locate in the channels by utilizing three N atoms to bridge two Cd1 atoms and one Cd2 atom. 1 not only possesses remarkable thermal stability, but also can steadily exist in different organic solvents and various acid/base solutions (pH = 3-12). Moreover, 1 can detect 2,4,6-trinitrophenol (TNP) and chromate (CrO/CrO) anions with high selectivity and sensitivity in water via the luminescent quenching. The detection limits of 1 for TNP and CrO/CrO are 6.23 μM and 2.13 μM/2.87 μM. The mechanism of TNP luminescence quenching may be attributed to photoinduced electron transfer and resonance energy transfer, and CrO/CrO quenching involves resonance energy transfer and competitive absorption of light. Additionally, 1 has the great anti-interference ability and repeatability for detecting TNP and CrO/CrO, which can display the feasibility of this material as a stable luminescent probe in aqueous system.
在溶剂热条件下成功合成了一种新型发光镉（II）-金属有机框架材料（1）（[Cd(BTC)(TPT)(H₂O)]·4H₂O，TPT = 三（4-吡啶基）三嗪，H₃BTC = 1,3,5-苯三甲酸）。1具有由镉原子和均苯三甲酸根阴离子组成的三维框架结构，沿c轴有大孔道。然后，三（4-吡啶基）三嗪配体利用三个氮原子桥连两个Cd1原子和一个Cd2原子位于孔道中。1不仅具有出色的热稳定性，还能在不同有机溶剂和各种酸/碱溶液（pH = 3 - 12）中稳定存在。此外，1能通过发光猝灭在水中对2,4,6-三硝基苯酚（TNP）和铬酸根（CrO₄²⁻/Cr₂O₇²⁻）阴离子进行高选择性和高灵敏度检测。1对TNP和CrO₄²⁻/Cr₂O₇²⁻的检测限分别为6.23 μM和2.13 μM/2.87 μM。TNP发光猝灭的机制可能归因于光诱导电子转移和共振能量转移，而CrO₄²⁻/Cr₂O₇²⁻猝灭涉及共振能量转移和光的竞争性吸收。此外，1在检测TNP和CrO₄²⁻/Cr₂O₇²⁻时具有很强的抗干扰能力和可重复性，这表明该材料作为水性体系中稳定的发光探针具有可行性。
