期刊
JOURNAL OF CHEMICAL PHYSICS
卷 120, 期 3, 页码 1168-1171出版社
AMER INST PHYSICS
DOI: 10.1063/1.1639151
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We employed pulsed deposition of p-H-2 onto a cold target to form a matrix sample suitable for measurements of infrared absorption. Unlike the method of rapid vapor deposition at similar to2.5 K, developed by Fajardo , this method can be performed at a temperature as high as 5.5 K, achievable with a closed-cycle refrigerator; pumping on liquid helium in a cryostat is eliminated. Compared with the enclosed-cell method developed by Oka, Shida, Momose, and co-workers, this method is more versatile in sample preparation, especially for samples at a greater concentration or with high reactivity. Two experiments were tested: the pulse-deposited sample of CH4/p-H-2 yields an infrared absorption spectrum nearly identical to that recorded with rapid vapor deposition, and a sample of vinyl chloride (C2H3Cl) in solid p-H-2 irradiated with laser emission at 193 nm yields C2H5, in contrast to formation of HCl, C2H2, and a complex of HCl.C2H2 observed upon photolysis of C2H3Cl in an Ar matrix. These experiments are also compared with those with n-H-2 or Ne as the matrix host. (C) 2004 American Institute of Physics.
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