Metal ion-water complex calculations



 Dear CCLers,
 Would any one please point to me any references of ab initio,
 semiempirical, DFT calculations on metal ion-water complexes? The metal
 ions I am interested in are Na+, K+, Mg2+, Zn2+, Cl-, etc.
 Thanks a lot in advance.
 Sincerely,
 Yongxing Liu