Third-order nonlinear optical properties of sandwich-type mixed (phthalocyaninato)(porphyrinato) europium double- and triple-decker complexes

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• 作者：Ning Sheng ; Zhuangdong Yuan ; Jingxia Wang ; W ; ong Chen ; Jing Sun ; Yongzhong Bian
• 关键词：Europium ; Phthalocyanine ; Porphyrin ; Sandwich complex ; Third-order nonlinearity ; Z-scan method
• 刊名：Dyes and Pigments
• 出版年：2012
• 出版时间：December, 2012
• 年：2012
• 卷：95
• 期：3
• 页码：627-631
• 全文大小：269 K

文摘

The nonlinear optical (NLO) properties of sandwich-type mixed tetrapyrrole europium double- and triple-decker complexes Eu(Pc)(TPYRP) (1) and Eu₂(Pc)₂(TPYRP) (2) [Pc?=?unsubstituted phthalocyaninate, TPYRP?=?5,10,15,20-tetrakis(1-pyrenyl)porphyrinate] were investigated by Z-scan experiments in CHCl₃ solution at 1064?nm wavelength, showing enhanced third-order NLO properties compared with metal free phthalocyanine, porphyrin, and pyrene. Strong intramolecular ¦Ð-¦Ð interaction and two-photon resonance are considered responsible for the large optical nonlinearity. The third-order NLO response of double-decker 1 is larger than that of triple-decker 2 probably associated with the unpaired electron in the former double-decker compound.