Chemical growth dynamics of 4-Methyl-4′-Hydroxy Benzylidene Aniline NLO single crystal structure and spectroscopic applications

Abstract

An aromatic Schiff bases organic nonlinear optical single crystal of 4-methyl-4′-hydroxy benzylidene aniline (MHBA) was grown by slow evaporation solution growth technique and the solubility of MHBA in ethanol at increasing temperature was esteemed. The unit cell proportions were gained by both single crystal and powder X-ray diffraction analysis. The structural refinement of MHBA shows that it crystallizes in the orthorhombic system with space group Pbcn. The molecule chiefly consists of two non – planar benzene rings attached by carbon and nitrogen atoms. The various planes of reflection were identified from the powder X-ray diffraction study and the unit cell proportions were same for single crystal XRD. Functional assemblies were entrenched by using Fourier transform infrared and FT Raman analysis by the molecular vibrations in the MHBA crystal. The assignment of protons and carbons in the grown MHBA crystals were recognized from 1H and 13C Nuclear Magnetic Resonance Spectroscopy analyses. The UV- visible and fluorescence spectral evaluate were carried out and to find the optical transmission and emission range of MHBA. The second harmonic generation productivity of MHBA is about 1.04 times than that of a standard sample of potassium dihydrogen orthophosphate. The thermal constancy of the grown crystal was investigated by differential scanning calorimetric, thermo gravimetric and a differential thermal analysis which confirms the decomposition of the sample occurs at 120 °C. Mechanical stuff, the hardness number, yield strength and Young's modulus of the grown material were studied using Vickers micro hardness tester and the work hardening coefficient reveals that MHBA belongs to the family of soft materials. The dielectric measurements with frequency and temperatures were used to find the power dissipation of the grown MHBA crystals.