Synthesis and properties of periodic mesoporous organosilicas using carbazole precursor for potential optical applications

Carbazole-substituted hexagonal mesoporous silica was synthesized using tetraethoxysilane (TEOS) and carbazole modified silica precursor as silica source and triblock copolymer as structure-directing agent based on surfactant assembly. The excitation spectrum of the carbazole modified silica precursor exhibited a blue shift as compared to pure carbazole. The carbazole modified silica precursor was characterized by time resolved spectroscopy, absorption and photoluminescence spectra. Well-ordered hexagonal arrays of the mesopores were investigated using transmission electron microscopy (TEM) and N-2 isotherm.