Photophysics of Three Pyridylbenzimidazoles in Solution

Article abstract of DOI:10.1021/j100210a034

Fluorescence decay time data are presented for the three benzimidazoles with pyridine substituted at the 2 position.The anomalous behavior of 2-(2'-pyridyl)benzimidazole in alcohols is explained in terms of the alcohol facilitating hydrogen transfer from the imidazole ring to the pyridine nitrogen atom.The rate constants for this process have been evaluated by studying the quenching of the fluorescence of 2-(2'-pyridyl)benzimidazole in cyclohexane by ethanol.