Photophysical process of hexadecyl 4-biphenylamino benzoate

The photophysical properties of hexadecyl 4-biphenylamino benzoate (HBAB), the molecule of which possesses a polar end composed of donor (triphenylami no group) and acceptor tester group) and a long non-polar alkyl tail, have been carefully studied in different conditions. The results show that the t wisted intramolecular charge transfer (TICT) emission is given in polar sol vents at room temperature and intramolecular charge transfer (ICT) emission is given at 77 K. These can be supported by the solvent effect, temperatur e effect and the quenching process. (C) 2001 Elsevier Science B.V. All righ ts reserved.