Langmiur-Blodgett studies of silicon(IV) phthalocyanine bis(trihexylsilyoxide) and its optical properties

摘要

Although much solution-based research has been carried out on silicon phthalacyanines, little work has been done on Si Pc LB films. In order to attempt studies on thin films, ultrathin Langmuir-Blodgett films of silicon(IV) phthalocyanine bis(trihexylsilyoxide), C_(68)H_(94)N8O2Si3 have been studied and characterised. Whilst silicon(IV) phthalocyanine bis(trihexylsilyoxide) is not a traditional LB film forming material, it can be made conducive to deposition by mixing with ideal film forming materials such as calixarenes. Surface pressure-area isotherms revealed an area per molecule of around 7.5 A~2 which indicates that the silicon(IV) phthalocyanine bis(trihexylsilyoxide) forms multi-lamella stacks. Thermal optical polarised spectroscopy revealed the formation of brightly coloured mesophases in films. DSC showed the presence of an irreversible A phase and a reversible T phase.