A New Tetrasubstituted Imidazole Based Difunctional Probe for UV-spectrophotometric and Fluorometric Detecting of Fe3+ Ion in Aqueous Solution

• 来源期刊: 高等学校化学研究（英文版）
• 年，卷（期）: 2019,（2）
• 页码范围: 200-208
• 页数: 9页
• 语种: 英文
• DOI: 10.1007/s40242-019-8244-0

摘要

Two new compounds,4-(2-bromophenyl-4,5-diphenyl-imidazol-1-yl)aniline(probe 1) and 4-[2,4,5-tris(4-bromophenyl)-1H-imidazol-1-yl]aniline(probe 2),were synthesized via a soft and high-efficiency one-pot microwave-assisted method under solvent-free conditions.Their sensing to different metal ions was detected by UV spectrophotometry and fluorescence spectrometry.Probe 2 revealed highly selective and sensitive UV and fluorescence response to Fe3+ ion.Upon the addition of Fe3+ ion,probe 2 showed obvious color change of the solution,conspicuous absorbance enhancement and relatively quick fluorescence quenching.The detection limit for Fe3+ ion was respectively calculated to be 0.72 μmol/L(fluorescent detection) and 0.48μmol/L(UV-spectrum detection).Also,probe 2 was bound by Fe3+ ion to form a 1∶1 complex.Moreover,preliminary application of probe 2 for detecting Fe3+ ion in aqueous solution was attempted,and satisfying results were obtained.