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Two‐Photon Absorption Properties of Dehydrobenzo[12]annulenes and Hexakis(phenylethynyl)benzenes: Effect of Edge‐Linkage
Author(s) -
Kamada Kenji,
Antonov Liudmil,
Yamada Satoru,
Ohta Koji,
Yoshimura Takashi,
Tahara Kazukuni,
Inaba Akiko,
Sonoda Motohiro,
Tobe Yoshito
Publication year - 2007
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200700555
Subject(s) - annulene , planarity testing , molecule , chemistry , femtosecond , two photon absorption , photochemistry , crystallography , absorption (acoustics) , fluorescence , stereochemistry , materials science , organic chemistry , optics , physics , laser , composite material
Two‐photon absorption (TPA) properties of two trefoil‐shaped compounds with different edge linkages—tris(hexadehydrotribenzo[12]annulene) and tris(tetradehydrotribenzo[12]annulene)—and three asterisk‐shaped compounds having no edge‐linkage—hexakis(phenylethynyl)benzenes—are investigated experimentally by the open‐aperture Z‐scan and TPA‐induced fluorescence methods with wavelength tuneable femtosecond pulses. The compound with ethynylene edge‐linkage exhibits the most intense TPA (the maximal TPA cross section is 1300±170 GM at 572 nm where 1 GM=10 −50 cm 4 s molecule −1 photon −1 ). The TPA activity of the compounds is primarily explained in terms of the planarity of the molecules in relation with the type of edge‐linkage.