在785nm激发波长观测了乐果晶体及其熔体拉曼光谱,结果显示乐果晶体60℃熔化后在344,428和530cm-1处出现新峰,498cm-1处,(P-S)和648cm-1处,(P=S)峰强度发生反转,,(P=S)峰发生反常蓝移现象。这表明晶体结构长程有序性破坏对乐果拉曼光谱存在较强影响,在有关乐果溶液拉曼光谱实验和理论研究中应予以考虑。 The Raman crystal and its melt Raman spectra were observed at excitation wavelength of 785 nm. The results showed that there were new peaks at 344,428 and 530 cm-1 at 498 cm-1, (PS) and 648 cm-1 , (P = S) peak intensity reversed, (P = S) peak anomalous blue shift phenomenon. This indicates that the long-range and orderly destruction of the crystal structure has a strong effect on the Raman spectrum of dimethoate, and should be considered in the experimental and theoretical studies on the Raman spectroscopy of dimethoate.