Synthesis, crystal growth and characterization of third order NLO active single crystal: 2-(4-ethylbenzylidene) malononitrile (EBM)

Publication date: Available online 18 July 2018Source: Journal of Physics and Chemistry of SolidsAuthor(s): A. Priyadharshini, S. KalainathanAbstractGood quality, third order nonlinear optical single crystal, 2-(4-ethylbenzylidene) malononitrile (EBM) was successfully grown by slow evaporation solution growth technique (SESGT) at room temperature using ethanol solvent. The formation of new crystalline structure, packing array and features of the molecular geometry were confirmed through the single crystal X-ray diffraction analysis. And also, it is addressed that, crystal belongs to the monoclinic system with centrosymmetric space group P21/c. The morphology of the EBM crystal is simulated with the help of WinXMorph software. The crystalline purity and multifarious functional groups of the EBM were ascertained by powder XRD and FT-IR analyzes, respectively. The Uv–Vis–NIR spectral study directs the way to find the lower cut-off wavelength (λ = 427 nm) and transparency (∼76%) of the grown specimen. The band gap of the EBM is estimated to be 2.92 eV. The photoluminescence spectrum of the crystal reveals that, it can be served as a new green lighting material. The quite low dielectric responses of EBM play a noticeable role in micro-electronics device application. The low etch pit density (EPD) is great evidence for the crystalline perfection of the titular crystal. The laser induced surface damaged threshold (LDT) value of inclusion free EBM crystal is 2.11 GWâ...

Source: Journal of Physics and Chemistry of Solids - July 18, 2018 Category: Physics Source Type: research