Nonlinear Optical Absorption Properties of Two Multisubstituted p-Dimethylaminophenylethenyl Pyridiniums
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- 作者：Xiuling Xu ; Wenwei Qiu ; Qing Zhou ; Jie Tang ; Fan Yang ; Zhenrong Sun ; Pierre Audebert
- 刊名：Journal of Physical Chemistry B
- 出版年：2008
- 出版时间：April 24, 2008
- 年：2008
- 卷：112
- 期：16
- 页码：4913 - 4917
- 全文大小：146K
- 年卷期：v.112,no.16(April 24, 2008)
- ISSN：1520-5207
文摘
Two multisubstituted D-
-A type pyridinium salts, N-methyl-2,6-di[(E)-p-dimethylaminophenylethenyl]pyridinium iodide (1) and N-methyl-2,4,6-tri[(E)-p-dimethylaminophenylethenyl]pyridinium iodide (2), weresynthesized with good yields by a modified method, and the structure of 1 was confirmed by X-ray diffraction.The nonlinear optical absorption (NOA) properties of the two compounds in the solution state were investigatedby the Z-scan technique. Compounds 1 and 2 both exhibited very strong saturated absorption at picosecondpulse, and 1 displayed reverse saturated absorption, while 2 revealed saturated absorption properties at thenanosecond pulse. The electron-donating ability, number of side chains, and molecular coplanar characteristicsof the compounds have a significant impact on their NOA properties.
-A type pyridinium salts, N-methyl-2,6-di[(E)-p-dimethylaminophenylethenyl]pyridinium iodide (1) and N-methyl-2,4,6-tri[(E)-p-dimethylaminophenylethenyl]pyridinium iodide (2), weresynthesized with good yields by a modified method, and the structure of 1 was confirmed by X-ray diffraction.The nonlinear optical absorption (NOA) properties of the two compounds in the solution state were investigatedby the Z-scan technique. Compounds 1 and 2 both exhibited very strong saturated absorption at picosecondpulse, and 1 displayed reverse saturated absorption, while 2 revealed saturated absorption properties at thenanosecond pulse. The electron-donating ability, number of side chains, and molecular coplanar characteristicsof the compounds have a significant impact on their NOA properties.