Complexation of tetraphenylthiophene-derived ammonium chloride to poly(sodium vinylsulfonate) polyelectrolytes: Aggregation-induced emission enhancement and long-range interaction

摘要

Fluorescent tetraphenylthiophene (TP)-derived ammonium cations TP-NH _3 ~+ are synthesized and reacted with poly(sodium vinylsulfonate) (PSV) polyanions to obtain three PSV-TP(x/y) (x/y = 4/1, 2/1 and 1/1) complexes with long-range electrostatic interactions (LEI) and novel aggregation-induced emission enhancement (AIEE) properties. Introduction of water into a dilute solution of PSV-TP(x/y) in THF results in self-aggregated particles with enhanced AIEE-operative emission. PSV or NaCl electrolyte is applied to control the LEI forces stabilizing the aggregated particles, and the AIEE-operative emissions can be thus manupulated. Due to the strong LEI forces, the solid PSV-TP(4/1) has a high FL quantum yield of 0.91. The relationship between AIEE and LEI forces is evaluated.