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Quadratic nonlinear optical properties of ruthenium (II)‐bipyridine complexes in crystalline powders
Author(s) -
Sakaguchi Hiroshi,
Nagamura Toshihiko,
Matsuo Taku
Publication year - 1991
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.590050408
Subject(s) - hyperpolarizability , ruthenium , chemistry , bipyridine , crystallography , 2,2' bipyridine , second harmonic generation , photochemistry , molecule , crystal structure , organic chemistry , optics , catalysis , laser , physics , polarizability
Quadratic nonlinear optical properties for the crystalline powders of two types of ruthenium‐bipyridine [Ru(bipy) 3 ] complexes were investigated. The nonlinear optical processes markedly depended on the molecular structures of the ruthenium complexes. Second harmonic generation (SHG) and very weak two‐photon emission were observed for the alkylated ruthenium‐bipyridine compexes with two long alkyl chains attached via amide bonds (RuC n B), whereas only two‐photon emission was observed for Ru(bipy) 3 . The existence of two amide bonds in one bipyridine ligand for RuC n B complexes most probably enhanced the molecular hyperpolarizability as compared with Ru(bipy) 3 . The SHG intensity from RuC n B complexes increased in the order RuC 18 B < RuC 12 B < RuC 16 B. The order of SHG intensity from RuC n B was ascribed to the difference in size of each crystalline powder estimated by X‐ray diffraction methods.