The conformational distribution in diphenylmethane determined by nuclear magnetic resonance spectroscopy of a sample dissolved in a nematic liquid crystalline solvent
作者:G. Celebre、G. De Luca、J. W. Emsley、E. K. Foord、M. Longeri、F. Lucchesini、G. Pileio
DOI:10.1063/1.1555631
日期:2003.4.8
The deuterium decoupled, proton nuclear magnetic resonance spectrum of a sample of diphenylmethane-d3 dissolved in a nematic liquid crystalline solvent has been analyzed to yield a set of dipolar couplings, Dij. These have been used to test models for the conformational distribution generated by rotation about the two ring-CH2 bonds through angles τ1 and τ2. Conformational distributions, particularly
已分析溶解在向列液晶溶剂中的二苯甲烷-d3 样品的氘解耦质子核磁共振谱,以产生一组偶极耦合,Dij。这些已用于测试通过角度 τ1 和 τ2 围绕两个环-CH2 键旋转生成的构象分布模型。构象分布,特别是当从量子化学计算中获得时,通常用势能面 V(τ1,τ2) 来描述,然后用它来定义概率密度分布 P(τ1,τ2)。这里表明,当尝试从实验数据中获得 P(τ1,τ2) 时,直接执行此操作而不经过尝试表征 V(τ1,τ2) 的中间步骤可能是一个优势。