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적외선 분광법에 의한 양이온 교환된 Faujasite의 T-O 결합특성
Characteristics of T-O Bonds in Cation-Exchanged Faujasite by IR Spectroscopy
HWAHAK KONGHAK, October 1989, 27(5), 629-636(8), NONE
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Abstract
양이온 교환된 faujasite에 대하여 적외선 분광법, X선 회절분석 및 X선 형광분석법을 이용하여 연구하였다. 적외선 흡수띠의 이동이나 Si/Al비 및 결정성의 정도를 고찰하였다. 양이온 교환된 faujasite에 대한 적외선 흡수띠를 분해하면 T-O(T:Al또는 Si)의 진동파수가 940-1051cm-1(띠A), 1000-1100cm-1(띠B), 1097-1190cm-1(띠C), 680-730cm-1(띠D), 748-780cm-1(띠E) 영역에서 나타났다. 띠A와 E는 각각 Al-O의 비대칭 신축진동(v1) 및 대층 신축진동(v2)에 의한 것으로 볼 수 있다. 띠C와 D는 Si-O의 비대칭 신축진동(v3)과 대층 신축진동(v2)에 의한 것으로 각각 보여진다. 띠B는 Si-O의 비대칭 신축진동(v1)과 Al-O의 비대칭 신축진동(v3)의 띠가 겹쳐져서 나타난 것으로 볼 수 있다.
The cation-exchanged faujasite were characterized and studied by infrared spectrometer, X-ray fluore-scence spectrometer and X-ray diffractometer. The Shift of i.r. absorption band, Si/Al ratio and degree of crystallinity were studied respectively. The deconvoluted bands of spectra for the cation-exchanged faujasite corresponding to T-O vibration frequency appeared at 940-1050cm-1(band A), 1000-1100cm-1(band B), 1097-1190cm-1(band C), 680-730cm-1(band D), and 748-780cm-1(band E). The bands A and E were assigned to the asymmetric stretching(ν1) and symmetric stretching(ν2) of Al-O respectively. The bands C and D were assigned to the asymmetric stretching(ν3) and symmetric stretching(ν2) of Si-O respectively. The band B was assigned to the overlapping of asymmetric stret-ching(ν1) of Si-O and asymmetric stretching(ν3) of Al-O.
