PM-IRRAS SPECTROSCOPY OF 9CB LIQUID-CRYSTAL THIN-FILMS DEPOSITED ON A METALLIC SUBSTRATE .1. VIBRATIONAL ANALYSIS

被引：5

作者：

BUFFETEAU, T ^{[1
]}

DESBAT, B ^{[1
]}

DEVAURE, J ^{[1
]}

SALIMI, A ^{[1
]}

TURLET, JM ^{[1
]}

机构：

[1] UNIV BORDEAUX 1,CTR PHYS MOLEC OPT & HERTZIENNE,CNRS,URA 283,F-33405 TALENCE,FRANCE

来源：

JOURNAL DE CHIMIE PHYSIQUE ET DE PHYSICO-CHIMIE BIOLOGIQUE | 1993年 / 90卷 / 09期

关键词：

D O I：

10.1051/jcp/1993901855

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Polarization Modulated InfraRed Reflection Absorption Spectroscopy (PM-IRRAS) has been used to obtain the vibrational spectra of 4-nonyl-4'-cyanobiphenyl (9CB) thin films deposited on a gold substrate. For the different phases of this liquid crystal, PM-IRRAS spectra of 1000 to 20 angstrom thin films exhibit important changes relative to the absorbance spectrum of a bulk sample. Just after deposition, the liquid crystal has a particular phase and it is necessary to cycle the sample at liquid nitrogen temperature to get the crystal phase. Phase transition temperatures are lower than those observed with a bulk sample. Concerning the crystalline phase, relative intensities on PM-IRRAS spectra are different from those mesured on the bulk absorbance spectrum. These differences are due to a well defined molecular orientation in the liquid crystal film.

引用

页码：1855 / 1870

页数：16

共 20 条

[11]

PETICOLAS WL, 1972, BIOCHIM BIOPHYS ACTA, V282, P8

[12] CONFORMATIONALLY DEPENDENT FERMI RESONANCES AND LONG-RANGE INTERACTIONS BETWEEN SIGMA-BONDS IN POLYMETHYLENE SYSTEMS DERIVED FROM THEIR RAMAN-SPECTRA [J].

RICARD, L ;

ABBATE, S ;

ZERBI, G .

JOURNAL OF PHYSICAL CHEMISTRY, 1985, 89 (22) :4793-4799

[13]

SALIMI A, 1990, THESIS U BORDEAUX 1

[14] ORDER-DISORDER TRANSITIONS IN ARACHIDATE MONOLAYERS [J].

SAPERSTEIN, DD .

JOURNAL OF PHYSICAL CHEMISTRY, 1986, 90 (07) :1408-1412

[15] VIBRATIONAL ANALYSIS OF THE N-PARAFFINS .2. NORMAL CO-ORDINATE CALCULATIONS [J].

SCHACHTSCHNEIDER, JH ;

SNYDER, RG .

SPECTROCHIMICA ACTA, 1963, 19 (01) :117-168

[16] STRUCTURE, REGISTRY AND IMAGING MECHANISM OF ALKYLCYANOBIPHENYL MOLECULES BY TUNNELING MICROSCOPY [J].

SMITH, DPE ;

HORBER, JKH ;

BINNIG, G ;

NEJOH, H .

NATURE, 1990, 344 (6267) :641-644

[17] VIBRATIONAL STUDY OF CHAIN CONFORMATION OF LIQUID N-PARAFFINS AND MOLTEN POLYETHYLENE [J].

SNYDER, RG .

JOURNAL OF CHEMICAL PHYSICS, 1967, 47 (04) :1316-&

[18] VIBRATIONAL-SPECTRA IN C-H STRETCHING REGION AND STRUCTURE OF POLYMETHYLENE CHAIN [J].

SNYDER, RG ;

HSU, SL ;

KRIMM, S .

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 1978, 34 (04) :395-406

[19] FUNDAMENTAL FREQUENCIES AND MOLECULAR CONFIGURATION OF BIPHENYL .I. RE-ANALYSIS OF ITS VIBRATIONAL SPECTRUM [J].

ZERBI, G ;

SANDRONI, S .

SPECTROCHIMICA ACTA PART A-MOLECULAR SPECTROSCOPY, 1968, A 24 (05) :483-&

[20] MOLECULAR MECHANICS FOR PHASE-TRANSITION AND MELTING OF NORMAL-ALKANES - A SPECTROSCOPIC STUDY OF MOLECULAR MOBILITY OF SOLID NORMAL-NONADECANE [J].

ZERBI, G ;

MAGNI, R ;

GUSSONI, M ;

MORITZ, KH ;

BIGOTTO, A ;

DIRLIKOV, S .

JOURNAL OF CHEMICAL PHYSICS, 1981, 75 (07) :3175-3194

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