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Proceedings Paper

Third-order nonlinear optical properties of soluble Cr(III)-dioxolene complexes
Author(s): Shin-ichiro Noro; Takafumi Sassa; Tetsuya Aoyama; Ho-Chol Chang; Susumu Kitagawa; Tatsuo Wada
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Paper Abstract

We synthesized novel ligand-based mixed valence (LBMV) CrIII-dioxolene complexes, [Cr(X4SQ)(X4Cat)(4,4'-di-tert-butyl-2,2'-bpy)] (SQ = semiquinone, Cat = catecohol, 2,2'-bpy = 2,2'-bipyridine; X = Cl (2a) and Br (2b)) and [Cr(X4SQ)(X4Cat)(4,4'-dinonyl-2,2'-bpy)] (X = Cl (3a) and Br (3b)), and prepared thin films for investigating their third-order nonlinear optical (NLO) properties in terms of the mixed valence states. Electronic absorption spectra of these complexes in solution and solid states showed an intervalence charge-transfer (IVCT) band from Cat2- to SQ•- at the IR region, indicating of a coexistence of SQ and Cat ligands, namely, LBMV state of the complexes. These complexes were well soluble in nonpolar organic solvent, which allowed us to prepare thin films by spin coating. The obtained films showed the electronic absorption spectra similar to those in solution and were amorphous because of steric hindrance of halogen and alkyl substituents in o-dioxolene and 2,2'-bpy moieties, respectively. The x(3) values of the films of 3a and 3b with a thickness of 30 ~ 40 nm were determined for 1.0 × 10-12 esu at 1.907 μm.

Paper Details

Date Published: 15 October 2004
PDF: 8 pages
Proc. SPIE 5517, Linear and Nonlinear Optics of Organic Materials IV, (15 October 2004); doi: 10.1117/12.559114
Show Author Affiliations
Shin-ichiro Noro, RIKEN--The Institute of Physical and Chemical Research (Japan)
Takafumi Sassa, RIKEN--The Institute of Physical and Chemical Research (Japan)
Tetsuya Aoyama, RIKEN--The Institute of Physical and Chemical Research (Japan)
Ho-Chol Chang, Kyoto Univ. (Japan)
Susumu Kitagawa, Kyoto Univ. (Japan)
Tatsuo Wada, RIKEN--The Institute of Physical and Chemical Research (Japan)


Published in SPIE Proceedings Vol. 5517:
Linear and Nonlinear Optics of Organic Materials IV
Robert A. Norwood; Manfred Eich; Mark G. Kuzyk, Editor(s)

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