A sensitive TICT Probe exhibiting ratiometric fluorescence repose to detect hydrazine in solution and gas phase
作者:Ramesh C. Gupta、Sushil K. Dwivedi、Rashid Ali、Syed S. Razi、Rudramani Tiwari、S. Krishnamoorthi、Arvind Misra
DOI:10.1016/j.saa.2020.118153
日期:2020.5
significant change in the photophysical property of the probe is attributed to a change in orientation of charge propagation. The probe with hydrazine shows ratiometric fluorescence "turn-on" response as well as naked-eye sensitive color change in the medium. The surface morphology studies (SEM and TEM) suggested about amorphousness and crystalline nature of the probe DPA and derivative DPA-HDz, respectively
设计并合成了基于分子内电荷转移(TICT)的双探针双氰基乙烯基-9-苯基蒽(DPA),用于检测肼(N2H4),且检出限良好(LOD,7.85 nM(0.25 ppb))。在与肼相互作用时,吸电子的双氰基乙烯基的末端官能改变为给电子的氨基/ hydr官能。因此,探针的光物理性质的显着变化归因于电荷传播方向的变化。带有肼的探针在介质中显示出比例荧光“开启”响应以及肉眼敏感的颜色变化。表面形态学研究(SEM和TEM)分别表明了探针DPA和衍生物DPA-HDz的非晶性和晶体性质。探针的导电行为在与肼相互作用时降低,这是因为基质的无定形性降低并且相对更刚性的晶体结构增加。此外,该探针还用于检测溶液中和试纸条上的肼蒸气,并具有良好的肉眼敏感响应。