作者:Kenji Hanabusa、Shingo Takata、Masafumi Fujisaki、Yasushi Nomura、Masahiro Suzuki
DOI:10.1246/bcsj.20160232
日期:2016.11.15
Carbazole-, quinoline-, benzothiazole-, and stilbene-containing fluorescent gelators are synthesized by connecting gelation-driving segments, and their gelation abilities are studied with 13 solvents. Fibrous thin-layer films are prepared on quartz plates from the solutions or gels, and they are studied as chemosensors for explosives. Fluorescence quenching of the films upon exposure to saturated TNT or RDX vapor is used to evaluate the abilities of the films to detect explosives. The relationship between the thickness of the thin-layer film and the quenching efficiency upon exposure to TNT is studied. The morphologies of the thin-layer films are observed by dynamic force mode scanning probe microscopy and discussed with regard to their fluorescence quenching. The interactions among chromophores in the gels, thin-layer films, and solutions are studied by variable-temperature spectroscopy. The mechanism of TNT detection is discussed from the viewpoint of the HOMO and LUMO energy levels.
合成了含有氮杂环、喹啉、苯并噻唑和苯乙烯的荧光凝胶剂,通过连接促使凝胶化的片段,并使用13种溶剂研究它们的凝胶能力。在石英板上从溶液或凝胶中制备了纤维状薄膜,并将其作为化学传感器用于探测爆炸物。薄膜在接触饱和的TNT或RDX蒸气时的荧光淬灭被用来评估薄膜检测爆炸物的能力。研究了薄层膜厚度与接触TNT时淬灭效率之间的关系。通过动态力模式扫描探针显微镜观察薄层膜的形态,并讨论其与荧光淬灭的关系。通过可变温光谱学研究凝胶、薄层膜和溶液中色谱体之间的相互作用。从HOMO和LUMO能级的角度讨论了TNT检测机制。