作者单位:Univ Barcelona, Dept Quim Inorgan & Organ, Marti I Franques 1-11, E-08028 Barcelona, Spain[1]Univ Nacl Autonoma Mexico, Dept Quim Inorgan, Fac Quim, Ciudad Univ, Mexico City 04510, DF, Mexico[2]Univ Nacl Autonoma Mexico, Fac Quim, Ciudad Univ, Mexico City 04510, DF, Mexico[3]CINVESTAV, Dept Quim, AP 14-740, Mexico City 07000, DF, Mexico[4]