Synthesis and two-photon properties of small dendritic chromophores with symmetrical and unsymmetrical substituted skeletons

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題名:	Synthesis and two-photon properties of small dendritic chromophores with symmetrical and unsymmetrical substituted skeletons
作者:	林子超;Lin, Tzu-Chau;Lee, Ying-Hsuan;Hu, Chia-Ling;Li, Yu-Kai;Huang, Yu-Jhen
貢獻者:	理學院化學學系
關鍵詞:	Applied sciences;Chemistry;Condensed benzenic and aromatic compounds;Dendritic �chromophores;Exact sciences and technology;Heterocyclic compounds;Heterocyclic compounds with n hetero atom and also o and/or s, se, te hetero atoms;Organic chemistry;Organic polymers;Palladium-catalyzed amination;Physicochemistry of polymers;Polymers with particular structures;Preparation, kinetics, thermodynamics, mechanism and catalysts;Preparations and properties;Two-photon absorption
日期:	2012-03-01
上傳時間:	2026-04-21 13:54:17 (UTC+8)
出版者:	Wiley-VCH Verlag;Weinheim: WILEY-VCH Verlag
摘要:	摘要： A set of novel multi‐branched chromophores consisting of two groups of fluorene/oxadiazole‐based analogues with generic skeletons of donor‐π‐acceptor (unsymmetrical) and donor‐π‐acceptor‐π‐donor (symmetrical) type has been synthesized and shown to display strong and broadly dispersed two‐photon absorptivities in the near infrared (NIR) region on irradiation with femtosecond laser pulses. It is also demonstrated that structural parameters such as the number of donor units attached and the substitution pattern are closely connected to the molecular two‐photon activities of these model compounds. A model chromophore set consisting of four fluorene/oxadiazole‐based analogues was synthesized, and its members were shown to display ascending two‐photon absorptivities with increasing size of their π systems. The observed nanosecond excited‐state lifetimes suggested that these model compounds could be potential candidates as broad‐band optical power limiters for laser pulses of long duration. 其他題名： Eur. J. Org. Chem 出版者： Weinheim: WILEY-VCH Verlag 出版日期： 2012-03 出處： European journal of organic chemistry, 2012, Vol.2012 (9), p.1737-1745 資源來源： Wiley Online Library - AutoHoldings Journals 版權： Copyright © 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim 版權： 2015 INIST-CNRS 識別號： ISSN: 1434-193X 識別號： EISSN: 1099-0690 識別號： DOI: 10.1002/ejoc.201101485
顯示於類別:	[化學學系] 期刊論文

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