Microwave synthesis and photophysical characterization of hybrid materials based on the encapsulation of dyes into unidirectional aluminophosphates

Abstract

In this work, hemicyanine dyes LDS 722 and LDS 730 are encapsulated into the 1D nanochannels of MgAPO-11 and MgAPO-5 aluminophosphates via crystallisation inclusion method. The synthesis of the hybrid material has been optimized through a systematic variation of the crystallization conditions and gel composition in order to obtain the purest phase possible suitable for optical applications. The tight tting between the molecular sizes of the guest dyes and the pore dimensions of the hosts has favoured a rigid planar conformation of the dyes. Consequently, the occlusion has led to a great enhancement of the uorescence with respect to the dye in solution together with an alignment along the channels.