STRUCTURE AND STRUCTURAL TRANSITIONS OF SIZE-SELECTED CLUSTERS - (CH3CN)(N) AND (CH3OH)(6)

被引:15
作者
BUCK, U
ETTISCHER, I
机构
关键词
D O I
10.1039/fd9949700215
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
Photodissociation spectra of acetonitrile clusters (CH3CN)(n) from n = 4 to n = 13, n = 24 +/- 3, n = 33 +/- 8 have been measured near the monomer frequencies of the CC-stretch (920.3 cm(-1)) and the CH3-rock (1041.8 cm(-1)) mode using a line-tunable CO2 laser. The clusters are size selected by momentum transfer in a scattering experiment with He, Ne and Ar atoms, respectively. The spectra near the CC-stretch mode are slightly red-shifted and do not depend on the cluster size. Near the CH3-rock mode there are two series of identical spectra for the even-sized clusters n = 4, 6, 12 and n = 9 exhibiting three peaks and the odd-sized clusters n = 5, 7, 13 and n = 8 showing two peaks, respectively. The results are explained by the pairwise antiparallel arrangement of these molecules with a strong dipole moment. For the methanol hexamer a transition between the two energetically lowest-lying isomers has been investigated by measuring their IR spectra.
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页码:215 / 228
页数:14
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共 44 条
[1]  
ALMUBARAK AS, 1988, FARADAY DISCUSS, V86, P209
[2]   THE ANISOTROPIC INTERACTION POTENTIAL OF D2NE FROM STATE-TO-STATE DIFFERENTIAL CROSS-SECTIONS FOR ROTATIONAL-EXCITATION [J].
ANDRES, J ;
BUCK, U ;
HUISKEN, F ;
SCHLEUSENER, J ;
TORELLO, F .
JOURNAL OF CHEMICAL PHYSICS, 1980, 73 (11) :5620-5630
[3]   ALPHA-ACETONITRILE AT 215-K [J].
BARROW, MJ .
ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1981, 37 (DEC) :2239-2242
[4]  
BERRY RS, 1988, ADV CHEM PHYS, V70, P74
[5]   AN EFFECTIVE PAIR POTENTIAL FOR LIQUID ACETONITRILE [J].
BOHM, HJ ;
MCDONALD, IR ;
MADDEN, PA .
MOLECULAR PHYSICS, 1983, 49 (02) :347-360
[6]   INTERMOLECULAR POTENTIALS FOR CH4, CH3F, CHF3, CH3CL, CH2CL2, CH3CN AND CO2 [J].
BOHM, HJ ;
AHLRICHS, R ;
SCHARF, P ;
SCHIFFER, H .
JOURNAL OF CHEMICAL PHYSICS, 1984, 81 (03) :1389-1395
[7]   STUDY OF MOLECULAR MOVEMENTS IN LIQUID-PHASE BEGINNING WITH PROFILE OF VIBRATION BANDS IN INFRARED AND FUNCTIONAL CORRELATIONS .1. ACETONITRILE [J].
BREUILLA.C ;
SOUSSENJ.J .
MOLECULAR PHYSICS, 1974, 28 (04) :905-920
[8]   ELECTRON-BOMBARDMENT FRAGMENTATION OF AR VAN DER WAALS CLUSTERS BY SCATTERING ANALYSIS [J].
BUCK, U ;
MEYER, H .
JOURNAL OF CHEMICAL PHYSICS, 1986, 84 (09) :4854-4861
[9]   INFRARED PHOTODISSOCIATION OF SIZE-SELECTED ACETONITRILE CLUSTERS [J].
BUCK, U ;
GU, XJ ;
KROHNE, R ;
LAUENSTEIN, C .
CHEMICAL PHYSICS LETTERS, 1990, 174 (3-4) :247-253
[10]   INFRARED PHOTODISSOCIATION OF SIZE-SELECTED METHANOL CLUSTERS [J].
BUCK, U ;
GU, XJ ;
LAUENSTEIN, C ;
RUDOLPH, A .
JOURNAL OF CHEMICAL PHYSICS, 1990, 92 (10) :6017-6029