2ND-HARMONIC GENERATION IN NONCENTROSYMMETRIC P-NITROANILINE SPONTANEOUSLY CRYSTALLIZED BY QUENCHING FROM LYOTROPIC LIQUID-CRYSTALLINE POLY(GAMMA-BENZYL-L-GLUTAMATE)

被引：8

作者：

KAMIO, Y

WATANABE, J

KAJIKAWA, K

TAKEZOE, H

FUKUDA, A

TOYOOKA, T

ISHII, T

机构：

[1] NIPPON OIL CO LTD,CENT TECH RES LAB,NAKA KU,YOKOHAMA 231,JAPAN

[2] TOKYO INST TECHNOL,DEPT POLYMER CHEM,MEGURO KU,TOKYO 152,JAPAN

[3] TOKYO INST TECHNOL,DEPT ORGAN & POLYMER MAT,MEGURO KU,TOKYO 152,JAPAN

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1991年 / 30卷 / 08期

关键词：

2ND-HARMONIC GENERATION; P-NITROANILINE; PBLG; POLY(GAMMA-BENZYL-L-GLUTAMATE); LYOTROPIC LIQUID CRYSTAL; ALPHA-HELIX; CHOLESTERIC LIQUID CRYSTAL; ORGANIC NONLINEAR OPTICAL MATERIAL; GUEST-HOST COMPOSITE;

D O I：

10.1143/JJAP.30.1710

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have found a new crystal structure of p-nitroaniline (pNA) formed by quenching a mixture of poly(gamma-benzyl-L-glutamate) (PBLG) and pNA in its lyotropic cholesteric liquid crystalline phase. Strong second-harmonic generation (SHG) has been observed in this quenched material, indicating the formation of a noncentrosymmetric structure of pNA. The maximum SH light intensity observed in PBLG/pNA = 3:2 is as large as 3.6 times that of 2-methyl-4-nitroaniline (MNA) powder. We have confirmed, on the basis of X-ray and differential scanning calorimetry (DSC) measurements, that the SHG-active crystal of pNA is segregatedly formed from the crystal domain consisting of alpha-helical PBLG.

引用

页码：1710 / 1714

页数：5

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