RAIRS Spectra of Alkanethiol SAMs in the C-H Stretching Region

RAIRS Spectra of Alkanethiol SAMs in the C-H Stretching Region 

(CH ) 1 ehain aaia, i.p. CCC plane 28SI 2X55 2850 7X52 2X49 2X52 

V=stretching a aaynunctiie s symmetric i p. = In plane o p.= out of pi ane FR = Fermi Resonance enhanced TM transition moment perpendicular = parallel. 

A CieSH as prepared B CieSH after 1 thermal cycle C CieSH after 2 thermal cycles D CieSH after 3 th mal cycles 

with the bands associated with longer chain SAMs appearing at lower wavenumbers [50], Therefore, a positive wavenumber shift of these peaks is usually interpreted as evidence of increas conformational disorder of the chains in the SAM, where the word disorder is intended to indicate that situation where departure from the all-trans conformation has taken place. 

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