Patent ID: 8647885
Filing Date: 2014-02-11
Classification: G01N,Y10T

Abstract:
1. A process for detecting a gaseous compound of BX 3 , HX or X 2 type within a gas using a composition containing a probe molecule, wherein the probe molecule is a molecule for which the reaction with one or more gaseous compounds of BX 3 , HX or X 2 type leads to a variation of at least one of its spectral properties, this variation being measurable by a suitable analysis technique, wherein the probe molecule is selected from alkali metal halides, quaternary ammonium halides, coumarin and its derivatives, porphyrazine and its derivatives, fluorescein and its derivatives, triarylmethanes, rhodamines, cresyl violet, derivatives of phenoxazine and oxazones, wherein the probe molecule is incorporated in a porous sol-gel matrix, having pores of diameter less than 20 Angstroms, based on inorganic polymers or organic-inorganic hybrids and wherein the following steps are carried out in this order: (a) measurement of said spectral property of the probe molecule prior to reaction with said one or more gaseous compounds, (b) repeat measurement of said spectral property after reaction with said one or more gaseous compounds, (c) correlation of the variation of said spectral property between the step of prior measurement of said spectral property of the composition (step (a)) and step (b) in the presence of said gaseous compound of BX