摘要
三角帆蚌贝壳珍珠层及养殖珍珠的拉曼光谱中除由文石矿物引起的拉曼峰外 ,还可观察到明显的由全反式结构的类胡萝卜素引起的 113 2cm-1(C—C单键的伸缩振动 )和 15 2 7cm-1(CC双键的伸缩振动 )两个拉曼峰 ,根据类胡萝卜素的拉曼光谱特征推断其分子中的CC双键的数目为 10。珍珠层中类胡萝卜素的相对浓度与珍珠层的颜色密切相关 ,在同一贝壳中从壳后端至壳顶 ,其相对浓度逐渐变小。对贝壳珍珠层中类胡萝卜素的研究可为珍珠漂白及在食品、化妆品等领域的应用提供科学的依据。
In the laser Raman spectra of nacre and cultured pearl from Hyriopsis cumingii (Lea), in addition to the bands due to aragonite mineral, two bands at 1 132 cm -1 (C-C single bond stretching vibration) and 1 527 cm -1 (CC double bond stretching vibration) are observed, which resulted from all-trans carotenoids. The number of CC double bonds in molecules of this carotenoid is predicted to be 10 based on the position of its Raman bands. The relative concentrations of carotenoid in nacre are closely associated with the color of nacre and tend to reduce gradually from posterior to umbo region in nacre of the same shell. Research on carotenoids in nacre and cultured pearl provides insight into the applications of them in cosmetics and food, as well as in pearl bleaching.
出处
《矿物学报》
CAS
CSCD
北大核心
2001年第3期389-392,共4页
Acta Mineralogica Sinica
基金
广东省自然科学基金项目 ( 0 0 0 898)
