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Crystal growth, physical properties and computational insights of semi-organic non-linear optical crystal diphenylguanidinium perchlorate grown by conventional solvent evaporation method
Journal of Crystal Growth ( IF 1.7 ) Pub Date : 2018-02-01 , DOI: 10.1016/j.jcrysgro.2017.11.007
M.S. Kajamuhideen , K. Sethuraman , K. Ramamurthi , P. Ramasamy

Abstract A splendid nonlinear optical single crystals diphenylguanidinium perchlorate (DPGP) was lucratively grown by low cost solvent evaporation method with the dimensions of 8 × 4 × 2 mm3. Structural and morphological studies of grown crystal were confirmed using X-ray diffraction studies. The presence of diverse functional groups was identified using FTIR and RAMAN studies. The molecular structure of a grown crystal was inveterate by NMR studies. The optical transmittance of DPGP crystal was analyzed using UV–vis-NIR studies. Photoluminescence spectrum shows sharp, well defined emission peak at 388 nm. Thermal studies assign that adduct is stable with the melting point of 164 °C. Microhardness studies declare that DPGP crystal belongs to the soft material class and their yield strength and elastic stiffness constant values were evaluated. Photoconductivity studies revealed the negative photoconductive nature of DPGP crystal. Second harmonic generation (SHG) efficiency of the DPGP crystal was 1.4 times that of potassium dihydrogen phosphate. Etching studies were carried out for different etching time. The dielectric studies were performed at different frequency. Laser damage threshold properties of DPGP crystal were examined using Nd:YAG laser system. The HOMO-LUMO energy gap evident the charge transfer interaction of the molecule. The calculated first order hyperpolarizability value is 5 times greater than that of urea. Thus, the grown DPGP single crystals are well suited for NLO device fabrications.

中文翻译:

传统溶剂蒸发法生长的半有机非线性光学晶体高氯酸二苯基胍的晶体生长、物理性质和计算见解

摘要 通过低成本溶剂蒸发法成功地生长了尺寸为 8 × 4 × 2 mm3 的出色非线性光学单晶高氯酸二苯基胍 (DPGP)。使用 X 射线衍射研究证实了生长晶体的结构和形态研究。使用 FTIR 和拉曼研究确定了不同官能团的存在。核磁共振研究证实了生长晶体的分子结构。使用UV-vis-NIR研究分析DPGP晶体的光学透射率。光致发光光谱在 388 nm 处显示出清晰明确的发射峰。热研究表明加合物在 164 °C 的熔点下是稳定的。显微硬度研究表明 DPGP 晶体属于软材料类别,并评估了它们的屈服强度和弹性刚度常数值。光电导研究揭示了 DPGP 晶体的负光电导性质。DPGP 晶体的二次谐波产生 (SHG) 效率是磷酸二氢钾的 1.4 倍。对不同的蚀刻时间进行蚀刻研究。介电研究是在不同频率下进行的。使用 Nd:YAG 激光系统检查 DPGP 晶体的激光损伤阈值特性。HOMO-LUMO 能隙证明了分子的电荷转移相互作用。计算出的一级超极化值比尿素大 5 倍。因此,生长的 DPGP 单晶非常适合 NLO 器件制造。磷酸二氢钾的4倍。对不同的蚀刻时间进行蚀刻研究。介电研究是在不同频率下进行的。使用 Nd:YAG 激光系统检查 DPGP 晶体的激光损伤阈值特性。HOMO-LUMO 能隙证明了分子的电荷转移相互作用。计算出的一级超极化值比尿素大 5 倍。因此,生长的 DPGP 单晶非常适合 NLO 器件制造。磷酸二氢钾的4倍。对不同的蚀刻时间进行蚀刻研究。介电研究是在不同频率下进行的。使用 Nd:YAG 激光系统检查 DPGP 晶体的激光损伤阈值特性。HOMO-LUMO 能隙证明了分子的电荷转移相互作用。计算出的一级超极化值比尿素大 5 倍。因此,生长的 DPGP 单晶非常适合 NLO 器件制造。计算出的一级超极化值比尿素大 5 倍。因此,生长的 DPGP 单晶非常适合 NLO 器件制造。计算出的一级超极化值比尿素大 5 倍。因此,生长的 DPGP 单晶非常适合 NLO 器件制造。
更新日期:2018-02-01
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