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Novel Disubstituted Phenylene‐Linked Bis‐imidazole Derivatives: Facile Synthesis and Optical Properties
Author(s) -
Song GuangLiang,
Zhu HongJun,
Chen Lei,
Liu Shan,
Luo ZhongHua
Publication year - 2010
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.201000014
Subject(s) - chemistry , imidazole , fluorescence , phenylene , solvent , mass spectrometry , photochemistry , absorption (acoustics) , spectroscopy , absorption spectroscopy , proton nmr , carbon 13 nmr , fluorescence spectroscopy , organic chemistry , polymer , physics , chromatography , quantum mechanics , acoustics
Abstract Six novel disubstituted phenylene‐linked bis‐imidazole derivatives, 3a – 3f , were prepared by a one‐pot, microwave‐assisted method under solvent‐free conditions, in yields ranging from 61.6 to 85.6%. The new compounds were characterized by 1 H‐ and 13 C‐NMR, UV/VIS, and fluorescence spectroscopy, and mass spectrometry, as well as by elemental analyses. The influence of substituents and solvents on the optical properties of 3a – 3f was investigated. It was found that there is little influence on absorption and excitation spectra in contrast to emission spectra. Compounds 3a – 3f exhibit strong fluorescence in solution, their fluorescence quantum yields ranging from 0.27 to 0.96.