Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1537588 | Optics Communications | 2010 | 6 Pages |
Abstract
A nickel complex of 5-(acrylamido)methyl-8-hydroxyquinoline, bis-(5-(acrylamido)methyl-8-hydroxyquinolino) nickel(II) (Ni(AAMQ)2) has been synthesized and its third-order nonlinear optical properties was investigated with respect to that of bis-(8-hydroxyquinolino) nickel(II) (NiQ2) by single beam Z-scan technique. The real parts (γR) of the molecular second-order hyperpolarizabilities were â6.0 Ã 10â46 and â5.5 Ã 10â46 m5/v2 for NiQ2 and Ni(AAMQ)2, respectively, indicative of similar nonlinear refraction both in sign and in magnitude. After substitution of an acrylamidomethyl group to the 8-hydroxyquinoline (8-HQ) ligand, the nonlinear absorption coefficient of Ni(AAMQ)2 was enhanced by more than two times. The corresponding imaginary part (γI) of the molecular second-order hyperpolarizability was 3.4 Ã 10â46 m5/v2 for Ni(AAMQ)2 while 1.6 Ã 10â46 m5/v2 for NiQ2. The increase in nonlinear absorption was attributed to the substitution effect and the enhanced transition dipole moment due to the participation of δ-donor group of CH2 in the molecular conjugation.
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Authors
Yan Qian, Minmin Cai, Shuangqing Wang, Yuanping Yi, Zhigang Shuai, Guoqiang Yang,