<研究報告>H-モルデナイトの清浄表面および窒素吸着面上で観測されるOH伸縮振動バンドのピーク分離の再検討(英文)

概要

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N_2 adsorption on H-mordenite at 110K gives two characteristic ν(NN) bands at 2335 and 2352 cm^<-1> accompanied by the drastic change of the ν(OH) bands as reported in the previous work (F. WAKABAYASHI et al., 1993,J. Phys. Chem., 97,10761). Band deconvolution of the ν(OH) bands observed for the bare and N_2-adsorbed H-mordenite at 110K is re-examined to obtain better curve-fitting than that reported previously. Considering the effect of the band shape on the deconvolution, the best curve fitting of the acidic OH band at 3616 cm^<-1> is obtained when the band is deconvoluted to a Gaussian shaped band at 3618 cm^<-1> and a Lorentzian band at 3600 cm^<-1>. Using this result, the ν(OH) bands observed for the N_2-adsorbed H-mordenite at 110K are deconvoluted into a Gaussian band 3618 cm^<-1>, a Loretzian band at 3600 cm^<-1>, and a Gaussian band at 3510 cm^<-1>. The decrease of the ν(OH) band at 3618 cm^<-1> and the increase of the ν(OH) band at 3510 cm^<-1> are linearly correlated with the increase of the ν(NN) band at 2335 cm^<-1>, which clearly shows the formation of 1 : 1 hydrogen-bonded complex between acidic OH groups of H-mordenite and the N_2 species that gives the ν(NN) band at 2335 cm^<-1>.
国立科学博物館の論文
1994-12-22