Quadratic nonlinear optical properties of ruthenium (II)-bipyridine complexes in crystalline powders

✍ Scribed by Hiroshi Sakaguchi; Toshihiko Nagamura; Taku Matsuo

• Publisher: John Wiley and Sons
• Year: 1991
• Tongue: English
• Weight: 259 KB
• Volume: 5
• Category: Article
• ISSN: 0268-2605
• DOI: 10.1002/aoc.590050408

✦ Synopsis

Quadratic nonlinear optical properties for the crystalline powders of two types of rutheniumbipyridine [Ru(bipy),] 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, B), whereas only two-photon emission was observed for Ru(bipy),. The existence of two amide bonds in one bipyridine ligand for RuC,B complexes most probably enhanced the molecular hyperpolarizability as compared with Ru(bipy),. The SHG intensity from RuC,B complexes increased in the order RuCl8B < RuClzB ---RuCl,B. The order of SHG intensity from RuC,B was ascribed to the difference in size of each crystalline powder estimated by X-ray diffraction methods.