Large Third-Order Optical Nonlinearity of Self-Assembled Porphyrin Oligomers

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• 作者：Kazuya Ogawa ; Tieqiao Zhang ; Keitaro Yoshihara ; and Yoshiaki Kobuke
• 刊名：Journal of the American Chemical Society
• 出版年：2002
• 出版时间：January 9, 2002
• 年：2002
• 卷：124
• 期：1
• 页码：22 - 23
• 全文大小：48K
• 年卷期：v.124,no.1(January 9, 2002)
• ISSN：1520-5126

文摘

Third-order nonlinear optical properties of two series of self-assembled porphyrin wires, one being terminated by zinc porphyrin and the other by free base porphyrin, were measured by femtosecond time-resolved optical Kerr effect. The hyperpolarizability values of the latter series were extremely large ranging from 10^-30 to 10^-29 esu, 10 times larger than the former. The behavior is accounted for by the contribution of terminal free base porphyrin to enhance the molecular polarization by acceptor nature toward central metalloporphyrin array.