Effect of alkyl substituents on the thermodynamics of the self-association of purine in aqueous solution
作者:Harri Lönnberg、Jyrki Ylikoski、Antti Vesala
DOI:10.1039/f19848002439
日期:——
the isodesmic model to the molar enthalpies of infinite dilution at different initial concentrations. Carbon-bonded alkyl groups have been shown to increase the tendency to association by making the association enthalpy more negative. In contrast, the increasing size of the N9-bonded alkyl groups appears to reduce the negative entropy contribution and thus stabilize the associated complexes. These findings
通过将等渗模型应用于不同初始浓度下无限稀释的摩尔焓,已确定了几种烷基取代的嘌呤自缔合的热力学参数。碳键合的烷基已显示出通过使缔合焓更负而增加了缔合趋势。相反,增加的N9键合烷基的大小似乎减少了负熵的贡献,从而稳定了相关的配合物。这些发现以偶极-诱导的偶极相互作用和疏水键的形式进行了讨论。