Sol-gel entrapment of ET(30) in Ormosils. Interfacial polarity-fractality correlation

Claudio Rottman, Gideon S. Grader*, Yoram De Hazan, David Avnir

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

80 Scopus citations

Abstract

ET(30) (2,6-diphenyl-4-(2,4,6-triphenyl-N-pyridino)phenolate) was successfully entrapped in organically modified silica (Ormosil) sol-gel matrices, while retaining its sensitivity to the environment polarity. This sensitivity was used to follow the variations in the cage interfacial polarities of the Ormosils, which were prepared from various proportions of methyltrimethoxysilane/tetramethoxysilane, and for probing the effective polarities within the pores and cages in the presence of several alkanols. Structural analysis of these Ormosils by small angle X-ray scattering revealed that these materials are surface fractals and that the surface fractality correlates linearly with the interfacial polarity of the materials. The doped sol-gel matrices are potentially suitable for alcohol sensors.

Original languageEnglish
Pages (from-to)5505-5508
Number of pages4
JournalLangmuir
Volume12
Issue number23
DOIs
StatePublished - 13 Nov 1996

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