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Molecular length dependent polarizability

机译:分子长度依赖性极化率

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Abstract: Electric Field Induced Second Harmonic GEneration (EFISH) and the electro-optic Kerr effect were applied to solutions of double stranded DNA, in which the average strand length varied from 2958 base pairs to 140 base pairs. This size range covers the transition from the `rod-like' model (which applies to samples $LS about 300 base pairs) to the `worm- like' model. In both these electro-optic measurements the electric dipole moment is primarily ionic in nature, and shows a saturating length dependence, although saturation occurred at different lengths. Saturation occurred at longer lengths for EFISH than for the Kerr effect.!17
机译:摘要:将电场诱导的二次谐波产生(EFISH)和电光Kerr效应应用于双链DNA溶液中,其平均链长在2958个碱基对到140个碱基对之间变化。这个大小范围涵盖了从“棒状”模型(适用于约300个碱基对的$ LS样本)到“蠕虫状”模型的过渡。在这两种电光测量中,电偶极矩本质上主要是离子性的,并且显示出饱和的长度依赖性,尽管饱和发生在不同的长度上。 EFISH的饱和时间比Kerr效应的时间更长。!17

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