- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Highly Selective Fluorescent Probe Based on 2-(2′-Dansylamidophenyl)-Thiazole for Sequential Sensing of Copper(II) and Iodide Ions
摘要： A novel highly selective fluorescent probe based on 2-(20-dansylamidophenyl)-4-phenylthiazole (1) is developed for sequential sensing of copper(II) and iodide ions in acetonitrile. The fluorescence mechanism is based on cation-induced inhibition of excited-state intramolecular hydrogen transfer, intramolecular charge transfer, and metal–ligand electron/charge transfer. Subsequent iodide-induced extrusion of copper(II) results in partial revival of fluorescence. Probe 1 and its ensemble with copper (II) show high selectivity for copper(II) and iodide ions, respectively, in acetonitrile solution.
关键词： Excited-state intramolecular hydrogen transfer,I?,Cu2+,Intramolecular charge transfer,Dansyl-thiazole conjugate
更新于2025-09-23 15:23:52
-
Efficient Solar Driven Hydrogen Transfer by Bismuth Based Photocatalyst with Engineered Basic Sites
摘要： Photocatalytic organic conversions involving a hydrogen transfer step (HT) have attracted much attention, but the efficiency and selectivity under visible light irradiation still needs to be significantly enhanced. Here we have developed a noble metal free, basic-site engineered bismuth oxybromide [Bi24O31Br10(OH)δ] that can accelerate the photocatalytic HT step in both reduction and oxidation reactions, i.e., nitrobenzene to azo/azoxybenzene, quinones to quinols, thiones to thiols, and alcohols to ketones under visible light irradiation and ambient conditions. Remarkably, quantum efficiencies of 42% and 32% for the nitrobenzene reduction can be reached under 410 and 450 nm irradiation, respectively. The Bi24O31Br10(OH)δ photocatalyst also exhibits excellent performance in up-scaling and stability under visible light and even solar irradiation, revealing economic potential for industrial applications.
关键词： Organic synthesis,Bismuth oxybromide,Visible light,Hydrogen transfer,Photocatalytic
更新于2025-09-23 15:21:01