据报道,基于酚喹啉与各种苯磺酸根和噻吩磺酸根阴离子的新型高效非线性光学晶体可用于光子学。所有酚喹啉鎓晶体均表现出很强的二次谐波生成(SHG)效率。其中,具有非中心单斜Pn空间群对称性的OHQ-MBS晶体(2-(4-羟基苯乙烯基)-1-甲基喹啉鎓4-甲氧基苯磺酸盐)表现出非常大的宏观二阶光学非线性,对角有效超极化率约为120×10 -30 esu,可以与最先进的有机非线性光学晶体相媲美。OHQ-MBS单晶,面积大于5×5 mm 2在混合溶剂系统中使用溶液生长法成功地生长了具有良好光学质量的光学器件。有趣的是,生长中的OHQ-MBS单晶表现出面外极轴,这是非常不寻常的,因为最新的有机非线性光学生长中的晶体通常表现出面内极轴。面外极轴对于应用各种光学配置非常有益。此外,还可以使用简单的裂解方法成功制备具有面内极轴的OHQ-MBS单晶。因此,面外和面内极轴都容易接近的OHQ-MBS晶体以及最新的光
据报道,基于酚喹啉与各种苯磺酸根和噻吩磺酸根阴离子的新型高效非线性光学晶体可用于光子学。所有酚喹啉鎓晶体均表现出很强的二次谐波生成(SHG)效率。其中,具有非中心单斜Pn空间群对称性的OHQ-MBS晶体(2-(4-羟基苯乙烯基)-1-甲基喹啉鎓4-甲氧基苯磺酸盐)表现出非常大的宏观二阶光学非线性,对角有效超极化率约为120×10 -30 esu,可以与最先进的有机非线性光学晶体相媲美。OHQ-MBS单晶,面积大于5×5 mm 2在混合溶剂系统中使用溶液生长法成功地生长了具有良好光学质量的光学器件。有趣的是,生长中的OHQ-MBS单晶表现出面外极轴,这是非常不寻常的,因为最新的有机非线性光学生长中的晶体通常表现出面内极轴。面外极轴对于应用各种光学配置非常有益。此外,还可以使用简单的裂解方法成功制备具有面内极轴的OHQ-MBS单晶。因此,面外和面内极轴都容易接近的OHQ-MBS晶体以及最新的光
Synthesis of Phenylbutadiynylpyridinium Derivatives for Nonlinear Optics
作者:Shin-ya Kan-no、Shuji Okada
DOI:10.1080/15421400701548993
日期:2007.9.4
1- Methyl- 4-[ 4-( dimethylamino) phenyl] butadiynyl} pyridinium ( PBP) derivatives with iodide or benzenesulfonate anion were synthesized as potential compounds for both second- and third- order NLO applications. PBP shows peculiar absorption spectrum in methanol, in which molar extinction coefficient at absorption maximum ( lambda(max)) decrease irrespective of bathochromic shift of lambda(max) compared with the corresponding compound with one triple bond between two aromatic rings. From semiempirical MO calculations, it was explained by aromatic- ring rotation of PBP in methanol. Activity on second- harmonic generation ( SHG) was found in four out of thirteen compounds synthesized. Although most of PBP derivatives were found to show exothermic reaction before melting, pure solid- state polymerization was not confirmed in these compounds.
Bulk size crystal growth, spectroscopic, dielectric and surface studies of 4-N,N-dimethylamino-4-N′-methylstilbazolium m-nitrobenzenesulfonate (DSMNS): A potential THz crystal of stilbazolium family
作者:A. Antony Raj、S. John Sundaram、R. Gunaseelan、P. Sagayaraj
DOI:10.1016/j.saa.2015.05.022
日期:2015.10
The synthesis and growth of a potentially useful and efficient nonlinear optical organic single crystal of 4-N,N-dimethylamino-4-N'-methylstilbazolium m-nitrobenzenesulfonate (DSMNS) is reported. The growth experiment involved the slope nucleation method coupled with slow cooling as well as slow solvent evaporation techniques. Single crystal X-ray diffraction (XRD), Fourier transform infrared (FT-IR), FT-Raman and nuclear magnetic resonance (NMR) techniques have been employed to ascertain the structure and composition of the crystal. Second harmonic generation (SHG) efficiency of the sample has been examined by Kurtz and Perry powder test. Thermogravimetry (TG), differential thermal analysis (DTA) and differential scanning calorimetry (DSC) techniques are employed to investigate the thermal behavior of the grown crystal. The frequency/temperature dependent dielectric properties of the organic crystal of DSMNS are studied. The surface features of the grown crystal are investigated by chemical etching study and atomic force microscopy (AFM). (C) 2015 Elsevier B.V. All rights reserved.
Aminostilbazolium Derivatives Substituted by Hydroxyethyl Groups for Second-Order Nonlinear Optics
As DAST (1-methyl-4-2-[4-(dimethylamino)phenyl]ethenyl}pyridinium p-toluenesulfonate) derivatives for improved crystal stability and inhibition of crystal water inclusion, 1-(2-hydroxyethyl)-4-(2-4-[bis(2-hydroxyethyl)amino]phenyl}ethenyl)pyridinium salts 2 (2a-2l) and 1-(2-hydroxyethyl)-4-2-[4-(diethylamino)phenyl]ethenyl}pyridinium salts 3 (3a-3l) were synthesized and their properties were investigated. Salts 3 were found to have no crystal water, and the cation with one hydroxyethyl group was effective to eliminate water inclusion in the crystals. Although the melting points of 2 were lower than those of the corresponding 3, decomposition temperatures of these chromophores were above 250 degrees C indicating their good thermal stability. Crystals of m-nitrobenzenesulfonate salt 3f was obtained without crystal water and showed SHG activity.
Lee, Ikchoon; Shim, Chang Sub; Chung, Soo Young, Journal of the Chemical Society. Perkin transactions II, 1988, p. 975 - 982
作者:Lee, Ikchoon、Shim, Chang Sub、Chung, Soo Young、Lee, Hai Whang