A Tetraphenylethene-Naphthyridine-Based AIEgen TPEN with Dual Mechanochromic and Chemosensing Properties
A Tetraphenylethene-Naphthyridine-Based AIEgen TPEN with Dual Mechanochromic and Chemosensing Properties
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DOI：
10.1021/acs.joc.7b00456
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发表时间：
2017-05-05
影响因子：
3.6
通讯作者：
Goel, Atul
中科院分区：
文献类型：
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作者：
Umar, Shahida;Jha, Ajay Kumar;Goel, Atul
通过一种无害的途径合成了新的四苯乙烯（TPE）共轭物，发现了一种独特的基于TPE的聚集诱导发射荧光团3（TPEN），当研磨时发射从蓝色变为绿色，发烟时发射从绿色变为蓝色时，TPEN显示出有趣的机械致变色特性。研究了TPEN的机械致变色性能，并将其应用于无墨安全文件用纸的制备。TPE-萘啶支架的详细的生物物理研究导致发现其对银离子（Ag+）的高灵敏度超过其它金属离子，在水性体系中的检测限为0.25 ACM。基于电子物理研究、质量分析和高分辨率质谱分析，确定TPEN和银离子的络合物的化学计量比为2：1（TPEN：Ag+）。
Synthesis of new tetraphenylethene (TPE) conjugates via an innocuous route led to the revelation of a unique TPE-based aggregation-induced emissive fluorogen 3 (TPEN), which showed an interesting mechanochromic property when the emission was changed from blue to green upon grinding and green to blue upon fuming. The mechanochromic property of TPEN has been explored to prepare ink-free rewritable paper for security documentation. A detailed photophysical investigation of the TPE-naphthyridine scaffold led to the discovery of its high sensitivity to silver ions (Ag+) over other metal ions with a detection limit of 0.25 ACM in an aqueous system. The stoichiometry of the complex of TPEN and silver ion was established to be 2:1 (TPEN:Ag+) on the basis of photophysical studies, mass analysis, and high-resolution mass spectrometry analysis.