电子吸收光谱法鉴别染料混合物中的三芳基甲烷、酞菁和杂蒽

Oleg Posilskyi, Ganna Artamonova, Elena Trunova
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摘要

本文采用电子吸收光谱法对43种不同颜色圆珠笔膏(蓝紫29种、粉紫3种、蓝3种、黑5种、绿1种、红2种)的定性组成和鉴别进行了研究。研究结果表明,每种浆料都可以通过研究其吸收光谱的性质来区分,这是由于不同官能团的存在而产生的。结果表明,大多数膏体样品含有以三芳基甲烷、酞菁、杂蒽染料或其混合物为基础的颜料。每种染料都有一定的吸收最大值。所有样品均在λ~590 nm处检测到最宽且最强的波段,对应于三芳基甲烷染料。λ~670 nm处为酞菁染料。在绿色范围(λ~520 ~ 560nm)存在吸收带,表明膏体成分中存在杂蒽染料。利用光致发光光谱的方法,在光谱的绿色区域(λ=530 nm)激发红外发光,表明11个蓝紫色,5个黑色和1个红色糊状物由于其组成中存在结晶紫和一些其他三芳基甲烷染料而表现出明亮的发光。三种蓝色膏体均检测到微弱发光。其他的三芳基甲烷染料的发光光谱与酞菁染料的吸收光谱重叠,这是由于酞菁染料在膏体中存在的缘故。所得数据可为鉴别和区分现代生产厂家圆珠笔膏的成分,建立其分类和鉴别差异提供参考依据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
IDENTIFICATION OF TRIARYLMETHANE, PHTHALOCYANINE AND XANTHENE IN A MIXTURE OF DYES BY ELECTRON ABSORPTION SPECTROSCOPY
In the work, the qualitative composition and differentiation of 43 samples of ballpoint pen pastes of different colors was investigated (blue-violet – 29 samples, pink-violet – 3 samples, blue – 3 samples, black – 5 samples, green – 1 sample and red –2 samples) by the method of electronic absorption spectroscopy. The results of the study showed that each paste can be distinguished by studying the nature of their absorption spectra, which arises due to the presence of different functional groups. It was established that most of the analyzed paste samples contain pigments based on triarylmethane, phthalocyanine, xanthene dyes or their mixture. Certain absorption maxima correspond to each type of dyes. The broad and most intense band at λ~590 nm, which was detected for all samples, corresponds to triarylmethane dyes. The band at λ~670 nm corresponds to phthalocyanine dyes. The presence of absorption bands in the green range (λ~520–560 nm) indicates the presence of xanthene dyes in the composition of the pastes. Using the method of photoluminescence spectroscopy upon exci­tation of IR luminescence in the green region of the spectrum (λ=530 nm) it is shown that 11 blue-violet, 5 black and one red pastes exhibit bright luminescence due to the presence of crystal violet and some other triarylmethane dyes in their composition. Weak luminescence was detected for three blue pastes. No luminescence response was observed for the other tes­ted pastes, which is due to the presence of phthalocyanine dyes in these pastes, the absorption of which overlaps with the luminescence spectra of triarylmethane dyes. The obtained data can be used to create a reference base for identifying and differentiating the composition of ballpoint pen pastes of modern manufacturers and establishing their classification and identification differences.
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