What type of nanoscopic environment does a cationic fluorophore experience in room temperature ionic liquids

摘要: In the presence of a cationic fluorophore (rhodamine 6G) whose absorption has significant spectral overlap with emission room temperature ionic liquid (RTIL), latter gets quenched, and quenching been shown to be dynamic in nature. It that resonance energy transfer (RET) indeed happens between RTIL (donor) rhodamine 6G (cationic acceptor), RET is reason for emission. The temporal aspects (between neat RTILs as donors acceptor) were closely studied by steady-state picosecond time-resolved fluorescence spectroscopy. influence alkyl chain length cation, size anion, excitation wavelength concentration acceptor on dynamics also investigated. time (obtained from rise was noted vary 2.5 ns 4.1 ns. By employing Forster formulation, donor–acceptor distance obtained, its magnitude found 31.8 37.1 A. independent cation but dependent anion RTIL. Moreover, observed or acceptor. formulation can possibly account mechanism hence explain experimental observables phenomenon. Following detailed experiments rigorous analysis, model put forward, which successfully nanoscopic environment experiences an experienced probe different neutral fluorophore.