Di-/trinuclear cationic Ir(III) complexes: Design, synthesis and application for highly sensitive and selective detection of TNP in aqueous solution
Di-/trinuclear cationic Ir(III) complexes: Design, synthesis and application for highly sensitive and selective detection of TNP in aqueous solution
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DOI：
10.1016/j.snb.2016.12.147
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发表时间：
2017-06
影响因子：
8.4
通讯作者：
Yang Cui;Lili Wen;G. Shan;Haizhu Sun;Huiting Mao;Min Zhang;Z. Su
中科院分区：
文献类型：
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作者：
Yang Cui;Lili Wen;G. Shan;Haizhu Sun;Huiting Mao;Min Zhang;Z. Su
成功合成了具有柔性链功能化三唑-吡啶部分作为桥联配体的新型二核和三核阳离子铱（III）配合物，即DC-Ir和TC-Ir，并研究了其光物理和电化学性质。尽管 DC-Ir 和 TC-I 具有不同数量的铱 (III) 核心，但在溶液和聚集状态下观察到几乎相同的发射。进行理论计算以研究它们的电子结构并合理化光物理和电化学行为。与溶液中的发射相比，它们在聚集态下表现出增强的光致发光。受益于水溶液中的高排放，DC-Ir和TC-Ir被用作检测爆炸物的“关断”传感器。结果表明，由于有效的光诱导电子转移以及强静电相互作用，DC-Ir和TC-Ir对2,4,6-三硝基苯酚（TNP）表现出快速、高灵敏和选择性的检测。
Novel di- and trinuclear cationic iridium(III) complexes with flexible chain functionalized triazole–pyridine moieties as bridging ligands, namelyDC-IrandTC-Ir, were successfully synthesized and their photophysical and electrochemical properties studied. DespiteDC-IrandTC-Irhave different numbers of iridium(III) cores, the almost identical emissions in both solutions and aggregation states were observed. Theoretical calculations were performed to investigate their electronic structures and rationalize the photophysical and electrochemical behaviors. Compared with the emission in the solution, they exhibit enhanced photoluminescence in the aggregation states. Benefiting from the high emission in aqueous solution,DC-IrandTC-Irwere employed as the “turn-off” sensors to detect the explosives. The results reveal thatDC-IrandTC-Irshow fast and highly sensitive and selective detection towards 2,4,6-trinitrophenol (TNP) owing to the efficient photo-induced electron transfer as well as the strong electrostatic interaction.