Thermo-optical characterization of fluorescent materials based on edible vegetable oils

IF 4.2 3区工程技术 Q2 CHEMISTRY, APPLIED Dyes and Pigments Pub Date : 2025-05-01 Epub Date: 2025-01-19 DOI:10.1016/j.dyepig.2025.112662

Teófanes B. Serna, Dora G. Felipe, Acácio A. Andrade, Viviane Pilla

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Abstract

This work evaluated the thermo-optical characterization of several vegetable oils such as Persea gratissima (avocado oil, AO), Mauritia flexuosa Linnaeus filius (buriti oil, BO), Passiflora edulis (passion fruit oil, PFO), and Plukenetia volubilis L. (Sacha inchi oil, SIO). Vegetable oils are nontoxic, nonvolatile, nondepletable, and biodegradable resources used for several applications, such as in the foods, cosmetic, lubricant, coating, and pharmaceutical industries, due to their possible antioxidant and antimicrobial activities. In this work, the refractive index temperature coefficients (dn/dT) of AO, BO, PFO, and SIO were characterized as a function of temperature (296-329 K⁻¹) via a Mach–Zehnder interferometer. The thermal diffusivity (D) and fluorescence quantum efficiency (η) were determined via the dual-beam mode-mismatched thermal lens (TL) technique. Fluorescence and time-resolved fluorescence measurements corroborate the TL results. AO presented a relatively higher η value than other vegetable oils did (BO, PFO, and SIO), and avocado oil was heat treated at 180 °C for the synthesis of carbon dots (C_AO-dots). The η and fluorescence lifetime (τ) results obtained for the avocado-based nanoparticles were compared with those of other C-dots using oil as a carbon source, aiming at potential bioapplications.

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基于食用植物油的荧光材料的热光学表征

本研究评估了几种植物油的热光学特性，如Persea gratissima（鳄梨油，AO）、Mauritia flexuosa Linnaeus filius （buriti油，BO）、Passiflora edulis（百香果油，PFO）和Plukenetia volubilis L. （Sacha inchi油，SIO）。植物油是一种无毒、不挥发、不可消耗和可生物降解的资源，由于其可能的抗氧化和抗菌活性，被用于食品、化妆品、润滑剂、涂料和制药等行业。本文通过马赫-曾达干涉仪表征了AO、BO、PFO和SIO的折射率温度系数dn/dT随温度（296-329 K−1）的变化。采用双光束模式不匹配热透镜（TL）技术测定了热扩散系数(D)和荧光量子效率（η）。荧光和时间分辨荧光测量证实了TL的结果。牛油果油的η值高于其他植物油（BO、PFO和SIO），牛油果油在180℃下热处理后合成了碳点（CAO-dots）。将牛油果基纳米颗粒的η和荧光寿命（τ）结果与其他以油为碳源的C-dots进行了比较，旨在潜在的生物应用。

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来源期刊

Dyes and Pigments 工程技术-材料科学：纺织

CiteScore

8.20

自引率

13.30%

发文量

933

审稿时长

33 days

期刊介绍： Dyes and Pigments covers the scientific and technical aspects of the chemistry and physics of dyes, pigments and their intermediates. Emphasis is placed on the properties of the colouring matters themselves rather than on their applications or the system in which they may be applied. Thus the journal accepts research and review papers on the synthesis of dyes, pigments and intermediates, their physical or chemical properties, e.g. spectroscopic, surface, solution or solid state characteristics, the physical aspects of their preparation, e.g. precipitation, nucleation and growth, crystal formation, liquid crystalline characteristics, their photochemical, ecological or biological properties and the relationship between colour and chemical constitution. However, papers are considered which deal with the more fundamental aspects of colourant application and of the interactions of colourants with substrates or media. The journal will interest a wide variety of workers in a range of disciplines whose work involves dyes, pigments and their intermediates, and provides a platform for investigators with common interests but diverse fields of activity such as cosmetics, reprographics, dye and pigment synthesis, medical research, polymers, etc.