NONCENTROSYMMETRIC STRUCTURE OF MEROCYANINE J-AGGREGATE ASSEMBLY STUDIED BY 2ND-HARMONIC GENERATION

被引：33

作者：

KAJIKAWA, K

TAKEZOE, H

FUKUDA, A

机构：

[1] Tokyo Institute of Technology, Department of Organic and Polymeric Materials, Meguro-ku, Tokyo, 152, O-okayama

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 1991年 / 30卷 / 8B期

关键词：

2ND-HARMONIC GENERATION; SURFACE 2ND-HARMONIC GENERATION; MEROCYANINE; J-AGGREGATE; MONOLAYER; LB FILM;

D O I：

10.1143/JJAP.30.L1525

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have found that the assembly of J-aggregates in a merocyanine monolayer Langmuir-Blodgett (LB) film has noncentrosymmetric structure by surface second-harmonic generation (SHG). The chromophores align along an average direction, so that the symmetry is C2v. The pure merocyanine monolayer has a large second-order nonlinear susceptibility chi-zzz = 1.3 x 10(-7) esu, because of the noncentrosymmetric domain of J-aggregates. The dissociation of the aggregates occurs by heating, resulting in negligible SHG activity due to random orientation of the chromophore on the surface plane. We also confirmed the long-range anisotropic orientation of the chromophore over several millimeters.

引用

页码：L1525 / L1528

页数：4

共 20 条

[1] INVESTIGATION OF ANISOTROPIC MOLECULAR ORIENTATIONAL DISTRIBUTIONS OF LIQUID-CRYSTAL MONOLAYERS BY OPTICAL 2ND-HARMONIC GENERATION [J].

CHEN, W ;

FELLER, MB ;

SHEN, YR .

PHYSICAL REVIEW LETTERS, 1989, 63 (24) :2665-2668

[2] DETERMINATION OF THE NONLINEAR OPTICAL SUSCEPTIBILITY X(2) OF SURFACE-LAYERS BY SUM AND DIFFERENCE FREQUENCY GENERATION IN REFLECTION AND TRANSMISSION [J].

DICK, B ;

GIERULSKI, A ;

MAROWSKY, G ;

REIDER, GA .

APPLIED PHYSICS B-PHOTOPHYSICS AND LASER CHEMISTRY, 1985, 38 (02) :107-116

[3] 2ND HARMONIC-GENERATION FROM LANGMUIR-BLODGETT-FILMS IN VARIOUS OPTICAL GEOMETRIES [J].

KAJIKAWA, K ;

KIGATA, K ;

TAKEZOE, H ;

FUKUDA, A .

MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1990, 182 :91-101

[4] SYMMETRY AND 2ND-ORDER SUSCEPTIBILITY OF HEMICYANINE MONOLAYER STUDIED BY SURFACE 2ND-HARMONIC GENERATION [J].

KAJIKAWA, K ;

TAKEZOE, H ;

FUKUDA, A .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 1991, 30 (05) :1050-1062

[5] MEROCYANINE J AGGREGATES - FORMATION AND STRUCTURAL-CHANGE ON CHEMICAL AND THERMAL TREATMENTS [J].

KAWAGUCHI, T ;

IWATA, K .

THIN SOLID FILMS, 1990, 191 (01) :173-191

[6] LANGMUIR-BLODGETT FILMS OF MEROCYANINE-J AGGREGATES - PREPARATION AND STRUCTURAL-CHANGE ON IRRADIATION BY LASER-LIGHT [J].

KAWAGUCHI, T ;

IWATA, K .

THIN SOLID FILMS, 1988, 165 (01) :323-336

[7] CORRELATION BETWEEN ELECTRON-SPIN RESONANCE AND OPTICAL ANISOTROPY IN LANGMUIR-BLODGETT FILMS OF A MEROCYANINE DYE [J].

KURODA, SI ;

IKEGAMI, K ;

SAITO, K ;

SAITO, M ;

SUGI, M .

THIN SOLID FILMS, 1989, 178 :555-561

[8] MICROSTRUCTURE OF J-BAND-FORMING CYANINE DYE MONOLAYER PROBED BY MEANS OF SECOND-HARMONIC GENERATION [J].

MIZRAHI, V ;

STEGEMAN, GI ;

KNOLL, W .

PHYSICAL REVIEW A, 1989, 39 (07) :3555-3562

[9] CONTROL OF CHROMOPHORE AGGREGATION IN MONOLAYERS AND MULTILAYERS OF LONG-CHAIN MEROCYANINE DYES [J].

NAKAHARA, H ;

MOBIUS, D .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1986, 114 (02) :363-377

[10] TWO-DIMENSIONAL ARRANGEMENT OF CHROMOPHORES IN J-AGGREGATES OF LONG-CHAIN MEROCYANINES AND ITS EFFECT ON ENERGY-TRANSFER IN MONOLAYER SYSTEMS [J].

NAKAHARA, H ;

FUKUDA, K ;

MOBIUS, D ;

KUHN, H .

JOURNAL OF PHYSICAL CHEMISTRY, 1986, 90 (23) :6144-6148

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