Abstract
Aggregation induced fluorescence blue-shift of the newly synthesized zinc bis(8-hydroxyquinoline) modified with cholesteryl (Zn(ChQ)2) is studied by static and picosecond transient emission spectroscopy.Fast solvent-induced charge transfer is found when Zn(ChQ)2 is dissolved in polar solvents.The twisted intramolecular charge transfer (TICT) state is formed as new emission state.Its emission spectra of Zn(ChQ)2 in aggregation form (film state) are blue-shifted compared to those in polar solvents.Steric hindrance induced weakened intermolecular interaction in aggregations lead to blue-shifted emission and enhanced quantum efficiency.Intermolecular energy transfer is found in solid film and independent on emission wavelength.
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