Patent number: 8247392
Abstract: Compounds of formula (I) are disclosed. The tetrapyrole ring in formula (I) can be substituted with a metal cation (M); R1, R2, R3 and R4 separately represent a hydrogen atom, a C1-4 alkyl or alkyloxy radical, or a phenyl radical optionally substituted by vinyl, hydroxy, nitro, amino, bromo, chloro, fluoro, iodo, benzyloxy, or hydroxymethyl radicals; R5, R6, R7 and R8 separately represent a hydrogen atom or a C1-4 alkyl radical; Ra, Rb and Rc separately represent a hydrogen atom, a C1-4 alkyl or alkyloxy radical optionally substituted by a halogen, or a phenyl radical optionally substituted by vinyl, hydroxy, nitro, amino, bromo, chloro, fluoro, iodo, benzyloxy, or hydroxymethyl radicals, wherein at least one of Ra, Rb, and Rc is a phenyl radical. Compounds of formula (I) bound to a silica, a sol-gel material or a mesoporous silica are useful for selective trapping of carbon monoxide.
Type:
Grant
Filed:
July 19, 2002
Date of Patent:
August 21, 2012
Assignee:
Centre National de la Recherche Scientifique (C.N.R.S.)
Inventors:
François Jerome, Géraud Dubois, Stéphane Brandes, Gabriel Canard, Jean-Michel Barbe, Roger Guilard, Bruno Roux-Fouillet, Henry Ledon