高荧光紫色色调自然染料Lagerstroemia叶:优秀的光学和OLED发光特性和抗氧化活性的应用程序

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications Pub Date : 2025-04-01 DOI:10.1016/j.optcom.2025.131818

R. Chaithra, D. Harshitha, C.G. Renuka

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引用次数: 0

摘要

采用不同溶剂对紫薇花中黄酮类染料的提取进行了研究。利用NMR和LC-MS技术分析了提取的染料的碳结构和植物化学特征，FT-IR光谱证实了功能基团的存在。该研究还评估了黄酮类化合物的光电、荧光和光度特性。SEM-EDX分析证实了其化学成分，以碳为主要元素。甲醇提取的类黄酮具有较窄的直接带隙（Eg = 2.57 eV）、较高的折射率（n = 1.54）、较高的介电常数（ε = 12.123）和较高的光学导电性（σ = 3.63 × 10^3 S/m）。黄酮类化合物以其高量子产率、显著的寿命和明显的斯托克斯位移而闻名，表现出强烈的紫色发射，光谱从紫色到蓝色。这些特性使它们在有机led和光电子应用中具有价值。此外，类黄酮有助于消除dpph自由基，有助于开发抗氧化绿色材料。

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A highly fluorescent violet hue natural dye from Lagerstroemia speciosa: Excellent optical and photoluminescent properties for OLED and antioxidant activity applications

The present study uses different solvents to investigate the extraction of flavonoid dyes from Lagerstroemia speciosa flowers. The extracted dyes were analyzed for their carbon structure and phytochemical profile using NMR and LC-MS techniques, while FT-IR spectroscopy confirmed the presence of functional groups. The research also evaluated flavonoids' optoelectronic, fluorescence, and photometric properties. SEM-EDX analysis confirmed the chemical composition, with carbon as the predominant element. The optical characteristics of the methanol-extracted flavonoid show a narrow direct bandgap (Eg = 2.57 eV), a high refractive index (n = 1.54), a dielectric constant (ε = 12.123), and elevated optical conductivity (σ = 3.63 × 10^3 S/m). Flavonoids are known for their high quantum yield, significant lifetime, and pronounced Stokes shift, exhibiting strong violet emission with a spectrum from violet to blue colors. These properties make them valuable for organic LEDs and optoelectronic applications. Additionally, flavonoids help eliminate DPPH-free radicals, contributing to developing antioxidant green materials.

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来源期刊

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.