摘要
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。
We detect Raman spectra of dimethoate crystal and melt at 785 nm. The results show new Raman peaks appear at 344, 428 and 530 cm-1 after dimethoate crystal melting at 60~C, the intensities of v(P-S)(~498 cm^-1) and v(P=S)(~648 cm^-1) are reversed, v(P=S) line takes abnormal blue shift. This indicates that the failure of crystal structure has large effect to Raman spectra of dimethoate, it should be taken into account in the ex- periment and theory research of dimethoate solution.
出处
《光散射学报》
北大核心
2013年第2期158-162,共5页
The Journal of Light Scattering
基金
山东省科技攻关项目(2010GSF10285)
关键词
乐果
拉曼散射
晶体
熔体
dimethoate
Raman scattering
crystal
melt