VIBRATIONAL SUM-FREQUENCY GENERATION (VSFG) SPECTRA OF N-ALKYLTRICHLOROSILANES CHEMISORBED ON QUARTZ PLATE

被引:58
作者
WATANABE, N
YAMAMOTO, H
WADA, A
DOMEN, K
HIROSE, C
OHTAKE, T
MINO, N
机构
[1] TOKYO INST TECHNOL,RESOURCES UTILIZAT RES LAB,4259 NAGATSUTA,MIDORI KU,TOKYO 152,JAPAN
[2] MATSUSHITA ELECT IND CO LTD,CENT RES LABS,SEIKA,KYOTO 61902,JAPAN
来源
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 1994年 / 50卷 / 8-9期
关键词
D O I
10.1016/0584-8539(94)E0064-H
中图分类号
O433 [光谱学];
学科分类号
0703 ; 070302 ;
摘要
Organic thin films prepared by chemical adsorption of n-alkyltrichlorosilanes (CH3(CH2)mSiCl3; m=6,7,13,17,18) on quartz plates were investigated by vibrational sum-frequency generation (VSFG) spectroscopy. The vibrational resonances by CH stretch bands of methyl and methylene groups were examined taking advantage of the fact that the bands associated with methylene groups in the trans conformation do not contribute to the VSFG signal. The density of adsorbed molecules and that of all-trans conformational sequences of alkyl chains decreased when the substrates were pretreated by oxygen plasma indicating the depletion of surface hydroxyls, which are the adsorption sites. The g-t conformation sequences on the plasma-treated substrates were found to increase by the length of the alkyl chain and the total number of gauche conformations exceeded that of adsorbed molecules when the number of CH2 groups in an alkyl chain is around 8.
引用
收藏
页码:1529 / 1537
页数:9
相关论文
共 16 条
[1]   SFG STUDY OF 2-DIMENSIONAL ORIENTATION OF SURFACE METHYL-GROUPS ON CADMIUM ARACHIDATE LANGMUIR-BLODGETT-FILMS [J].
AKAMATSU, N ;
DOMEN, K ;
HIROSE, C .
JOURNAL OF PHYSICAL CHEMISTRY, 1993, 97 (39) :10070-10075
[2]   SFG STUDY OF ROTATIONAL ANISOTROPY OF CADMIUM ARACHIDATE LANGMUIR-BLODGETT-FILMS [J].
AKAMATSU, N ;
DOMEN, K ;
HIROSE, C ;
ONISHI, T ;
SHIMIZU, H ;
MASUTANI, K .
CHEMICAL PHYSICS LETTERS, 1991, 181 (2-3) :175-178
[3]  
AKAMTSU N, 1993, J PHSY CHEM, V97, P10064
[4]   CONTACT-ANGLE STABILITY - REORGANIZATION OF MONOLAYER SURFACES [J].
EVANS, SD ;
SHARMA, R ;
ULMAN, A .
LANGMUIR, 1991, 7 (01) :156-161
[5]  
HEINZ TF, 1992, NONLINEAR SURFACE EL, pCH5
[6]   FORMULAS FOR THE ANALYSIS OF SURFACE SUM-FREQUENCY GENERATION SPECTRUM BY CH STRETCHING MODES OF METHYL AND METHYLENE GROUPS [J].
HIROSE, C ;
AKAMATSU, N ;
DOMEN, K .
JOURNAL OF CHEMICAL PHYSICS, 1992, 96 (02) :997-1004
[7]   FORMULAS FOR THE ANALYSIS OF THE SURFACE SFG SPECTRUM AND TRANSFORMATION COEFFICIENTS OF CARTESIAN SFG TENSOR COMPONENTS [J].
HIROSE, C ;
AKAMATSU, N ;
DOMEN, K .
APPLIED SPECTROSCOPY, 1992, 46 (06) :1051-1072
[8]   ORIENTATION ANALYSIS BY SIMULATION OF VIBRATIONAL SUM-FREQUENCY GENERATION SPECTRUM - CH STRETCHING BANDS OF THE METHYL-GROUP [J].
HIROSE, C ;
YAMAMOTO, H ;
AKAMATSU, N ;
DOMEN, K .
JOURNAL OF PHYSICAL CHEMISTRY, 1993, 97 (39) :10064-10069
[9]   CONTROL OF MOLECULAR TILT ANGLES IN ORIENTED MONOLAYERS DEPOSITED BY A CHEMICAL ADSORPTION TECHNIQUE AND APPLICATION OF THE MONOLAYERS AS AN ALIGNMENT FILM [J].
MINO, N ;
NAKAJIMA, K ;
OGAWA, K .
LANGMUIR, 1991, 7 (07) :1468-1472
[10]   ANALYSIS OF COLOR TRANSITIONS AND CHANGES ON LANGMUIR-BLODGETT-FILMS OF A POLYDIACETYLENE DERIVATIVE [J].
MINO, N ;
TAMURA, H ;
OGAWA, K .
LANGMUIR, 1991, 7 (10) :2336-2341