Abstract
Two isolated organic-inorganic pentavanadate-based hybrids, \({\rm[H_2N(CH_3)_2]_{6.34}[V^V(\mu_3-O)_4V^{IV}_4O_5(SO_4)_4]\cdot(SO_4)_{0.67}\cdot(DMF)\cdot[HN(CH_3)_2]_{1.66}}\)(1) and [(HN)2(CH2)2(CH3)4][VV(μ3-O)4V4IVO5(SO4)4][H2N(CH3)2]3·(DMF)· [HN(CH3)2]0.5(2)(DMF=N,N-dimethylformamide) have been synthesized under solvothermal conditions and structu-rally characterized. In compound 1, three adjacent basic units form a triangle type cluster. The symmetric double-layer exists in compound 2. The study of the third-order nonlinear optical(NLO) properties for the two compounds demonstrates that the two-photon absorption(TPA) cross-section σ values of compounds 1 and 2 are 1372 and 1228 GM, respectively, indicating that both compounds may have potential application in optical field.
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