¹³C-NMR常磁性緩和速度測定による水-メタノール混合溶媒系における二価遷移金属イオンの選択的溶媒和の検出

抄録

A ¹³C-NMR spin-lattice relaxation time of methanol was measured with solutions of o-, m-BDS (BDS: benzenedisulfonate) and perchlorate of some divalent transition metals in water-methanol mixture. The comparison in NMR data between water-methanol mixture and pure methanol solution gave the number of methanol molecules that locate in the first solvation sphere of divalent transition metal ions. The results show that divalent transition metal ions are preferentially hydrated in all the Mn²⁺ and Cu²⁺ salt/H₂O/Me0H systems, while in the Coo-BDS and Nio-BDS/HH₂0/MeOH system s, both Co²⁺ and Ni²⁺ show no preferential solvation behaviors, presumably due to the o-BDS^2- counter ion effect.