ABSTRACT
BARRYA.MORROWDepartmentofChemistry,UniversityofOttawa,Ottawa, Ontario,Canada
IAND.GAYDepartmentofChemistry,SimonFraserUniversity,Burnaby, BritishColumbia,Canada
I.Introduction
II.VibrationalSpectroscopy A.Generalspectralfeaturesandsurfacesilanolgroups B.Low-wavenumberspectraldata C.Siloxanesites
III.NMRSpectroscopy A.1Hspectroscopy B.29Sispectroscopy C.170spectroscopy
References
Inabookwhichisconcernedwithadsorptiononsilicasurfacesitisfirstnecessary todescribethenatureofthesilicasurface,andseveralsectionsofthischapterwill dealwithaspectsofthisproblem.Inthischapter,wewilldescribetwoofthemost widelyusedspectroscopictechniqueswhichhavebeenusedtocharacterizethesilica surfaceandadsorbedspeciesthereon;vibrationalspectroscopyandsolid-state NMRspectroscopy.Theformerhasbeenusedforoverfortyyearsandisso pervasivethatitisnowwidelyusedtostudyadsorbedspeciesonsurfacesunder severalguises,suchastransmissioninfrared(IR),Raman,diffusereflectanceIR (DRIFTS),photoacousticIR,andtotalreflectanceIR.Ontheotherhand,solidstateNMRisrelativelynewasappliedtostudiesofsurfaces,themethodologyis
stillunderactivedevelopment,andsomeappropriatebackgroundmaterialwillbe presented.
