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pH‐induced reorientation of microperoxidase‐11 in mesoporous molecular sieves
Author(s) -
Zhang B. Paul,
Donohoe Robert J.,
Bailey James A.
Publication year - 2007
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1661
Subject(s) - protonation , raman spectroscopy , molecular sieve , mesoporous material , substrate (aquarium) , chemistry , mesoporous silica , resonance (particle physics) , organic chemistry , catalysis , physics , atomic physics , optics , geology , adsorption , ion , oceanography
Abstract The resonance Raman spectra of microperoxidase‐11 loaded into the siliceous materials MCM‐41 and SBA‐15 demonstrate a pH dependence indicative of a protonation event on the substrate. An unusual change in relative Raman intensities without a shift in wavenumbers is observed upon lowering the system pH. Protonation of the silica surface is suggested to induce a reorientation of the MP‐11 fragments within the silica framework. Copyright © 2006 John Wiley & Sons, Ltd.