Photoinduced formation of selenium molecules in zeolites: A resonant Raman spectroscopy study

被引：32

作者：

Goldbach, A ^{[1
]}

Grimsditch, M ^{[1
]}

Iton, L ^{[1
]}

Saboungi, ML ^{[1
]}

机构：

[1] ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 1997年 / 101卷 / 03期

关键词：

D O I：

10.1021/jp962563w

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

After excitation of selenium encapsulated in Y-zeolite with 476 nm radiation, decomposition of the initially present semiconductor chains is observed. The fragmentation is influenced by the nature of the cations that counterbalance the negative charges of the aluminosilicate framework of the zeolite, In La3+- and Nd3+- exchanged Y-zeolite, Se-2(-) is formed upon irradiation with 476 nm laser light while Se-3 is generated in the Ca2+-exchanged form under the same conditions. Both species are identified by their resonance Raman spectra. The vibrational constants obtained for the electronic ground state of Se-3 in Ca-Y are omega(0) = 315 cm(-1) and omega(0)x(0) = 0.5 cm(-1), the respective values for Se-2(-) in La-Y are omega(0) = 329 cm(-1) and omega(0)x(0) = 0.8 cm(-1).

引用

页码：330 / 334

页数：5

共 22 条

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[2]

BOGOMOLOV VN, 1983, JETP LETT+, V38, P532

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