Vibrational spectra, dielectric properties, conductivity mechanisms and third order nonlinear optical properties of guanidinium 4-aminobenzoate

被引:15
作者
George, Jesby [1 ]
Sasikala, V. [1 ]
Joy, Lija K. [1 ]
Sajan, D. [1 ]
Arumanayagam, T. [2 ]
Murugakoothan, P. [2 ]
Vinitha, G. [3 ]
机构
[1] Bishop Moore Coll, Post Grad & Res Dept Phys, Ctr Adv Funct Mat, Mavelikara 690110, Kerala, India
[2] Pachaiyappas Coll, Post Grad & Res Dept Phys, Chennai 600030, Tamil Nadu, India
[3] VIT, Sch Adv Sci, Div Phys, Chennai 600127, Tamil Nadu, India
关键词
Cole-Cole plot; Electron-hole transport; NLO; Z-scan; Hyperpolarizability; INTRAMOLECULAR CHARGE-TRANSFER; TRANSITION DIPOLE-MOMENTS; ACID; 1/1; COMPLEX; SINGLE-CRYSTAL; ELECTRONIC-STRUCTURE; INFRARED-SPECTRA; NLO PROPERTIES; GROWTH; MONOHYDRATE; DFT;
D O I
10.1016/j.optmat.2019.01.006
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The frequency response of dielectric permittivity measurements at temperatures 35 degrees C and 100 degrees C suggests enhanced inherent optical quality and few defects in the crystal. The Cole-Cole plot shows the presence of grain and grain boundary, it is found that single relaxation is observed in the crystal. The ac and dc conductivity and dielectric behavior of the grown crystal were systemically investigated as a function of frequency and temperature. The third order nonlinear optical property extensively studied by z-scan technique revealed high third order nonlinearity in the form of self-defocusing and two-photon absorption with saturable absorption. The strong intermolecular charge transfer interaction evident from NBO and AIM studies confirms the NLO property of the material. The detailed vibrational assignments were carried out on the basis of potential energy distribution (PED) analysis and scaled quantum mechanical force field calculation using MOLVIB program. The red shifted NH stretching wavenumbers and the broadening of corresponding bands in the solid state as well as the gas phase spectra, optimized molecular geometry and NBO analysis have confirmed the presence of N-H center dot center dot center dot O hydrogen bonding in G4AB.
引用
收藏
页码:48 / 62
页数:15
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