2ND-ORDER OPTICAL NONLINEARITIES AND PHOTOSTABILITIES OF 2-N-METHYLSTILBAZOLIUM SALTS

被引：42

作者：

MARDER, SR ^{[1
]}

PERRY, JW ^{[1
]}

TIEMANN, BG ^{[1
]}

MARSH, RE ^{[1
]}

SCHAEFER, WP ^{[1
]}

机构：

[1] CALTECH, JET PROP LAB, DIV CHEM & CHEM ENGN, PASADENA, CA 91109 USA

来源：

CHEMISTRY OF MATERIALS | 1990年 / 2卷 / 06期

关键词：

D O I：

10.1021/cm00012a017

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：

We have synthesized a number of 2-N-methylstilbazolium salts and measured their powder second harmonic generation (SHG) efficiencies. The pale yellow salt 3′-methoxy-2-N-methylstilbazolium triflate was found to exhibit an SHG efficiency 24 times that of a urea reference standard at 532 nm, and an X-ray diffraction study showed the crystals to be noncentrosymmetric (space group Cc; a = 18.126 (4) Å, b = 7.040 (1) Å, c = 13.315 (2) Å, β = 93.46 (1)°, Z = 4). These crystals are photochemically stable under visible irradiation. On the other hand, 2′-methoxy-2-N-methylstilbazolium triflate shows no SHG signal; it forms centrosymmetric crystals (space group P21/n; a = 11.999 (2) Å, b = 13.458 (2) Å, c = 11.043 (2) Å, β = 108.47 (1)°, Z = 4) that undergo photochemical 2 + 2 cycloaddition. © 1990, American Chemical Society. All rights reserved.

引用

页码：685 / 690

页数：6

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