title: Synthesis, characterization and theoretical investigations of the structure, electronic properties and third-order nonlinearity optics (NLO) of M(DPIP)₂.
abstract: Three complexes of M(DPIP)2 (M=Cu, Co, Zn as 1, 2, 3) were synthesized and characterized by elemental analysis, IR, UV-Vis, thermogravimetry, and X-ray diffraction. Their nonlinear optical properties were measured by the Z-scan technique and yielded a normalized transmittance of about 70% for complex 1 (45 μJ pulse), and 93% for complex 3 (68 μJ pulse at the focus point). The nonlinear absorption coefficient, β, is 1.4×10(-11) m/W for 1 and 5.6×10(-13) m/W for 3, and the third-order nonlinear refraction index, n2, is 1.0×10(-18) m(2)/W for 3. Complex 1 shows self-defocusing property, while complex 3 exhibits self-focusing property. The thermogravimetric results show that the frame structure of compounds 1-3 begin to collapse at 400, 250 and 280°C, respectively, which suggests that they elicit excellent thermal stability. This research aims to provide better understanding of these compounds, and offer preliminary explanations for the significant differences between compounds 1-3, in order to potentially help in the designing of future novel materials with NLO properties.
authors.affiliation: Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, Jiangsu Key Laboratory for Biomass-based Energy and Enzyme Technology, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai'an 223300, Jiangsu Province, PR China.
authors.forename: Kang
authors.initials: K
authors.lastname: Li
authors.affiliation: Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, Jiangsu Key Laboratory for Biomass-based Energy and Enzyme Technology, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai'an 223300, Jiangsu Province, PR China; UCB 215, Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309, United States. Electronic address: hysytanggd@hotmail.com.
authors.forename: Guodong
authors.initials: G
authors.lastname: Tang
authors.affiliation: Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, Jiangsu Key Laboratory for Biomass-based Energy and Enzyme Technology, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai'an 223300, Jiangsu Province, PR China.
authors.forename: ShanShan
authors.initials: S
authors.lastname: Kou
authors.affiliation: UCB 215, Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309, United States.
authors.forename: Lance F
authors.initials: LF
authors.lastname: Culnane
authors.affiliation: Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, Jiangsu Key Laboratory for Biomass-based Energy and Enzyme Technology, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai'an 223300, Jiangsu Province, PR China. Electronic address: yuzhang@hytc.edu.cn.
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: School of Physical Science and Technology, Suzhou University, Suzhou 215006, PR China. Electronic address: ylsong@suda.edu.cn.
authors.forename: Yinglin
authors.initials: Y
authors.lastname: Song
authors.affiliation: Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, Jiangsu Key Laboratory for Biomass-based Energy and Enzyme Technology, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai'an 223300, Jiangsu Province, PR China.
authors.forename: Rongqing
authors.initials: R
authors.lastname: Li
authors.affiliation: Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, Jiangsu Key Laboratory for Biomass-based Energy and Enzyme Technology, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai'an 223300, Jiangsu Province, PR China.
authors.forename: Changmei
authors.initials: C
authors.lastname: Wei
mesh_terms: D056831:Coordination Complexes / Q000138:chemical synthesis* / Q000737:chemistry*; D018360:Crystallography, X-Ray; D004583:Electrons; D007093:Imidazoles / Q000138:chemical synthesis* / Q000737:chemistry*; D008024:Ligands; D008958:Models, Molecular; D008968:Molecular Conformation; D017711:Nonlinear Dynamics; D055620:Optical Phenomena; D010636:Phenols / Q000138:chemical synthesis* / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D013696:Temperature
chemical_list: D056831:Coordination Complexes; D007093:Imidazoles; D008024:Ligands; D010636:Phenols
keywords: Crystal structure; Imidazole coordination compounds; Nonlinear optical properties; Thermogravimetry; X-ray diffraction; Z-scan technique