Synthesis and Characterization of Highly Soluble Two-Photon-Absorbing Chromophores with Multi-Branched and Dendritic Architectures

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题名:	Synthesis and Characterization of Highly Soluble Two-Photon-Absorbing Chromophores with Multi-Branched and Dendritic Architectures
作者:	Lin,TC;Lin,WL;Wang,CM;Fu,CW
贡献者:	化學學系
关键词:	ABSORPTION CROSS-SECTIONS;ENHANCED 2-PHOTON ABSORPTION;POWER-LIMITING PROPERTIES;STRUCTURE-PROPERTY RELATIONSHIPS;CHARGE-TRANSFER;PHOTOPHYSICAL PROPERTIES;COOPERATIVE ENHANCEMENT;CONJUGATED DENDRIMERS;3-PHOTON ABSORPTION;EXCITED-STATE
日期:	2011
上传时间:	2012-03-27 18:13:16 (UTC+8)
出版者:	國立中央大學
摘要:	A set of novel multi-polar compounds composed of four fluorene-based derivatives with systematic alteration of the molecular structure was synthesized and their nonlinear optical properties in the femtosecond and nanosecond time domain were examined. Preliminary experimental results show that the two-photon activities of the model compounds are connected to structural parameters, such as the number of peripheral electron-donating groups and/or the size of the pi-domain in a dye molecule. It is also found that these model chromophores possess large nonlinear attenuation under the irradiation of laser pulses working at nanosecond regimes, indicating that these compounds may have strong two-photon-assisted excited-state absorption within the studied spectral region. Effective optical-power-limiting behaviors of the dendritic fluorophores were also demonstrated to show that such dye molecules can be potential materials for use as broadband and rapid-responsive optical limiters, especially against laser lights with longer pulses.
關聯:	EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
显示于类别:	[化學學系] 期刊論文

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