Aqueous Media Effect on Molecular Recognition. II. Temperature Dependence of Chemical Selectivity in Alcohols and Water
作者:Tadashi Endo、Yoshihiro Aono、Takashi Yazawa、Munetoshi Hayashi、Yuuichi Yokose、Takahiro Iida、Takashi Isago
DOI:10.1246/bcsj.70.3047
日期:1997.12
Oxidation of a pair of associating thiols (1 and 2), each having the binding site [–C(=O)NHC(=O)NH–] and the recognition site (R1 or R2), is examined at several temperatures in alcohols (MeOH, EtOH, n-PrOH, and i-PrOH) and water. The selectivity (r), a measure of molecular recognition of 1 by 2 (or of 2 by 1), in the oxidation is defined as the logarithmic ratio of the yield of an unsymmetrical disulfide
一对缔合硫醇(1 和 2)的氧化,每个硫醇都有结合位点 [–C(=O)NHC(=O)NH–] 和识别位点(R1 或 R2),在醇中的几个温度下进行检查(MeOH、EtOH、n-PrOH 和 i-PrOH) 和水。选择性 (r) 是氧化中 1 x 2(或 2 x 1)分子识别的量度,定义为不对称二硫化物 (4) 的产量与对称二硫化物产量的两倍的对数比( 3)。发现除了一种情况外,醇中的选择性均随温度升高而显着降低,而水中的选择性随温度升高而增加。讨论了观察到的选择性与影响选择性的因素(例如,分子间缔合、溶剂的物理化学性质和疏水相互作用)的相关性。