作者:Hiroko Ajiki、Federica Pozzi、Lulu Huang、Lou Massa、Marco Leona、John R. Lombardi
DOI:10.1002/jrs.3066
日期:2012.4
Monobromoindigo is a component of Tyrian purple, a purple–red natural colorant extracted from various species of sea snails, which was possibly first produced by the ancient Phoenicians and has been employed as a symbol of royalty and power by several civilizations over the centuries. Raman spectroscopy has proved to be an effective analytical technique to detect historical dyes, as it allows rapid and accurate identification of unknowns in a nondestructive way. Although other constituents of Tyrian purple have been comprehensively investigated by Raman spectroscopy, the Raman bands of 6-bromoindigo, a molecule that has been correlated with a specific snail species, Hexaplex trunculus (also known as Murex trunculus), have been reported but not previously assigned. This paper includes a complete assignment of the Raman spectrum of the 6-bromoindigo isomer, including experimental spectra recorded at 488 and 785 nm, which were compared with those collected from indigo under the same conditions.1 Theoretical Raman spectra for both molecules were obtained using density functional theory calculations. Copyright © 2011 John Wiley & Sons, Ltd.
单溴靛蓝是蒂利亚紫的一种成分,蒂利亚紫是从各种海螺中提取的一种紫红色天然着色剂,可能最早由古代腓尼基人生产,几个世纪以来一直被多个文明用作皇室和权力的象征。拉曼光谱已被证明是检测历史染料的有效分析技术,因为它能以无损的方式快速准确地识别未知物质。虽然拉曼光谱已经对提安紫色的其他成分进行了全面研究,但 6-bromoindigo 分子的拉曼光谱带却一直未见报道,而这种分子与特定的蜗牛物种 Hexaplex trunculus(又称 Murex trunculus)有关。本文对 6-溴靛蓝异构体的拉曼光谱进行了完整的赋值,包括在 488 和 785 纳米波长处记录的实验光谱,并将其与在相同条件下从靛蓝采集的光谱进行了比较1。Copyright © 2011 John Wiley & Sons, Ltd. All Rights Reserved.