【摘要】 对多种彩色珍珠样品进行了可见光光谱和拉曼光谱测试,研究了珍珠致色成分的种类及其与颜色的关系。研究结果表明:(1)彩色淡水珍珠和海水珍珠样品均会在1 121～1 132和1 506～1 524cm-1范围出现强峰,该特征峰归属于多烯化合物的C—C和C—C伸缩振动;(2)随着珍珠颜色的加深,样品位于1 117～1 132,1 502～1 524和2 000～3 500cm-1范围的峰逐渐增强,特征峰所代表的有机质与珍珠颜色有关;(3)深紫色淡水珍珠和深橘红色海水珍珠样品在1 475～1 575cm-1范围的包络峰可分成8～10个次级峰,计算可知多烯化合物C—C双键数目分别为N=9～27和N=7～27。珍珠中不同种类和含量的多烯化合物,可能是彩色珍珠的致色原因。更多还原

【Abstract】 Based on the visible spectra and Raman spectra test of a variety of colored pearls samples to study the relationship between the organic component and the pearl’s color was studied.The study results show that both the freshwater and seawater pearls exhibit strong characteristic peaks in 1 121～1 132and 1 506～1 524cm-1 range,which is respectively attributed to the C—C and C—C stretching vibration;the peak intensity in 1 117～1 132,1 502～1 524and 2 000～3 500cm-1range increases as the color deepens,which is closely related to the pearl’s color;The peak in the 1 475～1 575cm-1 range is divided into 8～ 10secondary peaks of purple freshwater pearl and deep orange seawaterpea rl.Thenumberof C—C doublebondsisN=9～ 27and N=7～27respectively after calculation.Polyene compound of different varieties and content could be the reason for the pearls’ color.更多还原