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DSC and Raman Spectra for α- and β-Endosulfan plus 60/40 mixture

机译:DSC和拉曼光谱用于α-和β-硫丹加60/40的混合物

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The symmetrical β-conformer of endosulfan has the identical chemical composition of the asymmetrical α-conformer, and both have very different melting/boiling points. The α- and β-isomer however have markedly different Raman spectra at each of 50℃, 75℃ and 100℃. Moreover, the commercially available Raman spectra of the 60/40 (α-/p~) mixture at the same temperatures is discrete from either α- and b-isomer alone. Previous research demonstrated that at α- boiling point 110℃, β-conformer partially converts to aDSC curves of mixtures suggest thermal interactions and conformational changes occurs in BOTH α- and β-isomer at temperatures even 60℃ lower than the liquid/gas phase transition.
机译:硫丹的对称β-构象异构体具有与不对称α-构象异构体相同的化学组成,并且两者的熔点/沸点都非常不同。然而,α-和β-异构体在50℃,75℃和100℃各自具有明显不同的拉曼光谱。此外,在相同温度下60/40(α-/ p〜)混合物的市售拉曼光谱与单独的α-异构体和b-异构体是不连续的。先前的研究表明,在α沸点110℃时,β-构象异构体部分转化为混合物的aDSC曲线,表明即使在比液相/气相转变温度低60℃的温度下,α-和β-异构体都发生热相互作用和构象变化。 。

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