使用拉曼光谱仪检测氦氖激光诱导的光致发光,对钴基蓝色颜料进行实用鉴定

IF 2.4 3区 化学 Q2 SPECTROSCOPY
Sergio Ruiz-Moreno, MaJosé Soneira, Rosanna Perez-Pueyo
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引用次数: 0

摘要

自 19 世纪初以来,历史上被称为钴蓝的颜料一直是艺术绘画中最广泛使用的颜料之一。由于钴蓝具有多种优异的特性,人们迅速开发出了各种不同的合成工艺,从而形成了今天的钴基颜料。由于许多钴基颜料都是由相同的原材料(主要是钴氧化物(或盐类)和氧化铝)制成,因此即使使用拉曼光谱,也很难对这些颜料进行区分和表征。在这项研究中,我们使用拉曼光谱仪,以红色 He-Ne 激光(632 nm)为激发光源,分析了六种钴基商标颜料和两种化学纯化合物(铝酸钴和煅烧氧化铝)。值得注意的是,作者在这种结构的钴基颜料中只检测到了与铝酸钴相关的 517 cm-1 附近的拉曼频带。为了获得更多信息,这项工作的一个基本目的是检测这些化合物中煅烧氧化铝(α-氧化铝)残留物发出的光致发光(PL),尤其是位于 1367 和 1396 cm-1 处的强双色光。从实验角度来看,在光谱仪的同一光谱范围内同时获得拉曼和聚光信息是非常了不起的。此外,517 厘米-1 附近的拉曼光谱带的强度与双色谱带的强度之间的关系可用作估算每种颜料质量的指标。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Practical identification of cobalt-based blue pigments detecting the induced photoluminescence by a He-Ne laser using a Raman spectrometer

Practical identification of cobalt-based blue pigments detecting the induced photoluminescence by a He-Ne laser using a Raman spectrometer

Practical identification of cobalt-based blue pigments detecting the induced photoluminescence by a He-Ne laser using a Raman spectrometer

Since the early 19th century, the pigment historically known as cobalt blue has been one of the most widely used in artistic painting. Its many and excellent properties led to the rapid development of different synthesis processes for the pigments known today under the generic name of cobalt-based pigments. The differentiation and characterization of these pigments is often difficult, because many of them are made of the same raw materials, mainly cobalt oxides (or salts) and alumina (aluminum oxide), even when Raman spectroscopy is used. In this research, six cobalt-based trademark pigments and two chemically pure compounds, cobalt aluminate and calcined alumina, have been analyzed using a Raman spectrometer with a red He-Ne laser (632 nm) as the excitation source. It should be noted that only the Raman band around 517 cm−1 associated with the cobalt aluminate has been detected by the authors in cobalt based pigments with this configuration. In order to obtain additional information, a fundamental aim of this work has been to detect the photoluminescence (PL) emitted by the leftover of calcined alumina (α-alumina) in these compounds, particularly in the form of a strong doublet located at 1367 and 1396 cm−1. From an experimental point of view, it is remarkable that both Raman and PL information can be acquired within the same spectral range of the spectrometer. Additionally, the relationship between the intensities of the Raman band around 517 cm−1 and those of the doublet can be used as an indicator to estimate the quality of each pigment.

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来源期刊
CiteScore
5.40
自引率
8.00%
发文量
185
审稿时长
3.0 months
期刊介绍: The Journal of Raman Spectroscopy is an international journal dedicated to the publication of original research at the cutting edge of all areas of science and technology related to Raman spectroscopy. The journal seeks to be the central forum for documenting the evolution of the broadly-defined field of Raman spectroscopy that includes an increasing number of rapidly developing techniques and an ever-widening array of interdisciplinary applications. Such topics include time-resolved, coherent and non-linear Raman spectroscopies, nanostructure-based surface-enhanced and tip-enhanced Raman spectroscopies of molecules, resonance Raman to investigate the structure-function relationships and dynamics of biological molecules, linear and nonlinear Raman imaging and microscopy, biomedical applications of Raman, theoretical formalism and advances in quantum computational methodology of all forms of Raman scattering, Raman spectroscopy in archaeology and art, advances in remote Raman sensing and industrial applications, and Raman optical activity of all classes of chiral molecules.
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