Syntheses, Structures and Third-Order Nonlinear Optical Properties of Two-Dimensional Rhombohedral Grid Coordination Polymers: [Cd(imz)3]2(BTC)·0.5H2O and [Cu4(H2O)2(imz)8](BTC)2·7H2O(BTC = 1, 2, 4, 5-benzenetetracarboxylate anion, imz = imidazole)

Abstract

Hydrothermal reactions of 1, 2, 4, 5-benzenetetracarboxylic acid (H 4 BTC) with cadmium acetate and copper acetate in the presence of imidazole (imz) resulted in two new coordination polymers, namely, [Cd(imz) 3 ] 2 (BTC)Á0.5H 2 O 1, [Cu 4 (H 2 O) 2 (imz) 8 ](BTC) 2 Á7H 2 O 2.Two compounds have been characterized structurally using single-crystal diffraction, elemental analysis, and FT-IR spectrum. In compound 1, the hexa-coordinated Cd(II) ions are bridged by BTC to form two-dimensional rhombohedral grid sheets. In compound 2, the coordination polyhedrons [CuO 4 N 2 ] and [CuO 3 N 2 ] are bridged by BTC to lead to a 2D framework with rectangular-shaped cavities. Two compounds of third-order nonlinear optical (NLO) properties were determined by Z-scan technique in DMSO solution. The results showed that two compounds exhibited strong NLO absorption and strong self-focusing effects. The third-order NLO absorptive coefficients b(MKS) are 5.45 9 10 -11 m W -1 for 1 and 9.81 9 10 -11 m W -1 for 2. The refractive indexes c(MKS) are 3.96 9 10 -18 m 2 W -1 for 1 and 7.60 9 10 -18 m 2 W -1 for 2. The third-order NLO susceptibility v (3) are calculated to be 1.25 9 10 -11 for 1, 2.32 9 10 -11 esu for 2, respectively. These values are larger than those of metal coordination polymers reported.

A new dinuclear copper (II) complex of 2,5–Furandicarboxyclic acid with 4(5)‐Methylimidazole as a high potential α‐glucosidase inhibitor: Synthesis, Crystal structure, Cytotoxicity study, and TD/DFT calculations

“…According to obtained results for 6‐Mepic−Co (II)/Cu (II) complexes, 2 − TFMBA and nitrobenzene, these results are remarkable. It is concluded that calculated χ (1) and χ (3) results are coherent with those results of different molecular systems …”

“…In this respect, it could be considered that the relation between α and n parameters showing the polarization of the compounds through the electromagnetic field of the light . Moreover, the χ (1) parameter called linear susceptibility exhibiting the linear response of the material and the χ (3) parameter called third−nonlinear optical susceptibility defined with Z‐scan technique in the literature were investigated. The larger χ (n) is remarkable to achieve nonlinear optical effect due to the lower value of the strength(s) of the applied electric field(s) and the shorter the path length.…”

“…The α, Δα, n , χ (1) , β, γ and χ (3) parameters of the Cu (II) complex are examined by using equations given references therein . The results of these parameters are given in Table S3.…”

Novel Mn(II) and Zn(II) complexes of 6‐bromopicolinic acid as a potential optical material: Synthesis, spectral characterizations, linear, and nonlinear optical properties and density functional theory calculations

“…Due to building the basis of experimental work containing transition metal complexes of 6-BrpicH ligand without experimental study with Z-scan technique, the χ (1) (linear optical susceptibility) exhibiting the linear response associated with the linear absorption and refractive index and χ (3) (third-order nonlinear optical susceptibility) parameters were investigated without Z-scan technique. [62][63][64][65][66] The larger χ (n) related to the nonlinear optical effect means the lower applied electric field strength and the shorter path length.…”

Structure and third-order nonlinear optical properties of the two-dimensional CoIIcoordination polymer [Co(1,2-BIB)(PA)]n{1,2-BIB is 1,2-bis[(1H-imidazol-1-yl)methyl]benzene and H2PA is phthalic acid}

“…Our research group has reported a number of coordination polymers constructed from bis(imidazolyl) ligands. The third-order NLO properties of these compounds as films or in solution have been discussed (Zhao, Liu et al, 2014;An et al, 2015;Lian et al, 2015;Zhao et al, 2015a,b;Liu et al, 2016). Interestingly, the third-order nonlinear susceptibilities of these compounds are much larger than those of the pure inorganic semiconductor materials and some polymer materials (Ballesteros et al, 1999;Poornesh et al, 2009;Zhao, Pan et al, 2014).…”