Smart Materials Analytic Research and Technology SMART Laboratory

Changanassery, India

Smart Materials Analytic Research and Technology SMART Laboratory

Changanassery, India

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Mahalakshmi V.,Smart Materials Analytic Research and Technology SMART Laboratory | Lincy A.,Smart Materials Analytic Research and Technology SMART Laboratory | Thomas J.,Kuriakose Elias College | Saban K.V.,St Aloysius College
Optik | Year: 2015

Crystals of diaqua maleatocalcium (II) (CaC4H2O4·2H2O) have been grown by the controlled diffusion of ionic species in inert hydrosilica gel. The single crystal X-ray diffraction studies reveal that the crystal belongs to orthorhombic system with non-centrosymmetric space group P212121. The unit cell parameters are a = 6.849(5) Å, b = 8.665(5) Å, c = 11.002(5) Å and α = β = γ = 90.000(5)°. The functional groups present in the compound are identified from the FTIR spectrum. Thermogravimetric studies are performed to explore the thermal stability and decomposition pattern of the material. The UV - vis - NIR studies indicate wide transparency window, a befitting material characteristic for optoelectronic applications. The optical band gap of the material was estimated using diffuse reflectance spectroscopy. The second harmonic generation (SHG) efficiency possessed by the crystal is revealed by the Kurtz and Perry powder test. © 2015 Elsevier GmbH.


Lincy A.,Smart Materials Analytic Research and Technology SMART Laboratory | Mahalakshmi V.,Smart Materials Analytic Research and Technology SMART Laboratory | Thomas J.,Kuriakose Elias College | Raghavaiah P.,University of Hyderabad | Saban K.V.,St Aloysius College
Optik | Year: 2016

Single crystals of a new nonlinear optical material, triaquatrismalonatodicerium (III) dihydrate ([3H2O(C3H2O4)3 Ce2]·2H2O), have been grown using gel aided solution growth technique. The functional groups present in the crystal are identified using FTIR spectrum. X-ray diffraction studies on single crystals showed that the compound crystallizes in the monoclinic system with a non centrosymmetric space group P21 with unit cell dimensions a = 7.6795(5)Å, b = 12.9648(7)Å, c = 8.9545(5)Å, α = γ = 90°, β = 101.380(6)°. Thermogravimetric studies reveal the thermal stability and decomposition pattern of the material. The UV - vis spectrum indicates excellent transmittance in the entire visible region. Optical band gap energy of the crystal was evaluated from the diffused reflectance spectrum (DRS). Photoluminescence spectroscopy throws light on the optical emission properties. Excellent second harmonic generation (SHG) efficiency of the crystal was confirmed by Kurtz and Perry powder test. © 2015 Elsevier GmbH.

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