Department of Physics, Takshashila University, Ongur (PO), Tindivanam (TK), Villupuram, 604305, Tamilnadu, India.
Department of Chemistry, School of Engineering and Technology, Surya Group of Institutions, Vikravandi, Villupuram, 605652, Tamilnadu, India.
J Fluoresc. 2023 Jan;33(1):287-295. doi: 10.1007/s10895-022-03061-7. Epub 2022 Nov 21.
Herein, we report the extraction, characterization, linear and third-order nonlinear optical (TONLO) features of the natural pigment from Ocimum tenuiflorum leaves using different polar solvents. The polar solvents such as, ethanol, acetone, methanol and dimethyl sulfonate (DMSO) were used to extract the natural pigment from Ocimum tenuiflorum leaves. The effect of solvent on linear and TONLO properties of the natural pigment was studied and multi- parameter scale known as Kamlet-Abboud-Taft was used to analyse the solvent characteristics on solute molecule. The functional groups of the extracted natural pigments were examined via Fourier transform infrared (FT-IR) spectrometer. TONLO characteristics of the natural pigment was scrutinised by a continuous wave (CW) diode laser working at 650 nm wavelength. The nonlinear refractive index (n) and nonlinear coefficient of absorption (β) of the natural pigment was ascribed to the behavior of self-defocusing, saturable absorption (SA) and reverse saturable absorption (RSA). The TONLO susceptibility (χ) of the natural pigment in polar solvents was found to be the order of 10 esu. The natural pigment extracted from Ocimum tenuiflorum leaves is a potential material for applications in nonlinear optical.
在这里，我们报告了使用不同极性溶剂从罗勒叶中提取、表征天然色素的线性和三阶非线性光学（TONLO）特性。使用极性溶剂，如乙醇、丙酮、甲醇和二甲基亚砜（DMSO）从罗勒叶中提取天然色素。研究了溶剂对天然色素线性和 TONLO 性质的影响，并使用多参数标度 Kamlet-Abboud-Taft 来分析溶剂特征对溶质分子的影响。通过傅里叶变换红外（FT-IR）光谱仪检查提取的天然色素的官能团。通过连续波（CW）二极管激光器在 650nm 波长下工作来研究天然色素的 TONLO 特性。天然色素的非线性折射率（n）和非线性吸收系数（β）归因于自散焦、饱和吸收（SA）和反饱和吸收（RSA）的行为。在极性溶剂中，天然色素的 TONLO 磁化率（χ）为 10esu 量级。从罗勒叶中提取的天然色素是一种在非线性光学中具有应用潜力的材料。
