珍珠层的FT-Raman光谱特征

FT-Raman spectra of nacre in shell of Hriopsis cumingii

采用傅里叶变换拉曼光谱 (FT Raman)对我国三角帆蚌贝壳珍珠层及其在 1 5 0℃处理 1至 1 5 h不等后的样品进行了研究 ,并与相应的激光拉曼光谱进行了对比 .结果表明 ,两类拉曼光谱均能观察到珍珠层中无机相文石的特征拉曼峰 ,但各峰的相对强度稍有不同 .FT Raman光谱中可观察到两个有机质的拉曼峰 ,位置为 1 5 0 7cm- 1 和 1 1 2 7cm- 1 ,它们在加热 6h后消失 ,这与激光拉曼光谱可观察到类胡萝卜素的拉曼峰明显不同 .此外 ,FT Raman研究证实在 1 5 0℃加热即使长达 1 5 h,珍珠层中的文石依然未发生相变 .

Fourier transformation Raman spectroscopy is used to study the nacre of mollusk shell ( Hriopsis cumingii ) before and after heattreatment at 150 ℃ for 115 h in ambient condition.The results show that the typical Raman spectra of aragonite are observed before and after heattreatment.Compared with the laser Raman spectra,the two extra Raman bands at 1 507 cm -1 and 1 127 cm -1 produced by organic matrix in nacre are observed and they are vanished after heattreatment for 6 h.