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Equilibria between Peroxo and Hydroperoxo Species in the Titanosilicates: An In Situ High‐Resolution XANES Investigation
Author(s) -
Prestipino Carmelo,
Bonino Francesca,
Usseglio Sandro,
Damin Alessandro,
Tasso Andrea,
Clerici Mario G.,
Bordiga Silvia,
D′Acapito Francesco,
Zecchina Adriano,
Lamberti Carlo
Publication year - 2004
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200400427
Subject(s) - xanes , titanium , aqueous solution , in situ , absorption (acoustics) , spectroscopy , absorption spectroscopy , chemistry , materials science , organic chemistry , optics , physics , composite material , quantum mechanics
Water is the key factor : For titanium‐silicalite‐1 in aqueous H 2 O 2 , the driving force that governs the equilibrium between the uncolored end‐on η 1 ‐titanium–hydroperoxo complex and the yellow‐colored side‐on η 2 ‐Ti‐peroxo complex (see picture) is the amount of water present in the system, as proven by in situ X‐ray absorption near edge structure spectroscopy performed at 77 K.