Carbazole-based diphenyl maleimides: Multi-functional smart fluorescent materials for data process and sensing for pressure, explosive and pH
作者:Xiaofei Mei、Kexi Wei、Guixiu Wen、Zhengde Liu、Zhenghuan Lin、Zhonggao Zhou、Limei Huang、E Yang、Qidan Ling
DOI:10.1016/j.dyepig.2016.06.015
日期:2016.10
the N-benzyl analogue, two kinds of applications were explored. One is rewritable data recording processes including solvent writing and vapor writing. The other is sensing for low hydrostatic pressure (0–25 MPa). Interestingly, nanoparticles of the dyes formed in aqueous solution could effectively detect explosive and pH changes. A 15 ppm concentration of picric acid quenched the fluorescence of the
通过Ullmann反应,高收率合成了一系列具有不同N取代基的咔唑基二苯基马来酰亚胺染料。染料由于其弱分子间相互作用而固定的扭曲构象,在固态下表现出强烈的发射,导致内部旋转受阻。由于晶体到晶体或晶体到非晶的相变,它们的固态发射波长和强度对外部刺激(如热,压力和蒸汽)敏感。基于氮的多刺激响应荧光特性-苄基类似物,探讨了两种应用。一种是可重写的数据记录过程,包括溶剂写入和蒸气写入。另一个是感应到较低的静水压力(0–25 MPa)。有趣的是,在水溶液中形成的染料纳米粒子可以有效检测爆炸物和pH值变化。浓度为15 ppm的苦味酸淬灭了N-甲基类似物的荧光,其可检测极限计算为0.13 ppm。所述Ñ甲基类似物也表现出在pH范围12-14,它源于染料分子在强碱性溶液中的水解不同的发射颜色和强度。