Abstract
ABSTRACT A hybrid organic-inorganic material derived 3-(glycidoxypropyl)-tnmethoxysilane (GPTMS) and fullerene derivatives hasbeen developed for optical limiting applications. The control of the final material has been achieved by engineering the matrix-fullerene solid-state system. Different Lewis acids (Zr(OBut)4, , BF3, SiCl4, and TiCl4) have been used as the catalystsofthe epoxy ring opening of(GPTMS) and the polyethylene oxide formation, in three different syntheses, to control and optimisethe matrix-fullerene interaction and the optical limiting properties. The microstructure of the hybrid matrix has been studied byFourier Transform Infra-Red Spectroscopy. UV-vis spectra and optical limiting measurements ofthe doped materials showed that in the Zr(OBut)4, TiCl4, BF3 derived matrices clustering of fulleropyrrolidine molecules is avoided and optical limiting is obtained. In the Ti(OBut)4, SiC!4 and not epoxy catalysed derived matrices, instead, the aggregation of flilleropyrrolidines degraded theoptical limiting properties. The laser damage threshold in the Zr(OBut)4, TiCl4 and especially BF3 derived matrices was largerthan in the other matrices. Moreover, a multilayer system has been fabricated to develop an optical limiting device.Keywords: hybrid, sol-gel, epoxy, fullerene, optical limiting
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