摘要
Yttrium forms with CPApM a 1:2 α-complex instantaneously in acidic medium.At pH～ (buffer solution),the α-complex is transformed to a β-complex with an absorption peak at 755 nm after standing.The transformation reaction is a first-order reaction.The rate constant and the apparent activation energy were found to be 9.67×10^(-) min^(-1) and 52.3 kJ·mol^(-1) respectively.The mechanism of the reaction shows that the β-complex(Y:CPApM=2:4)is formed by combining two molecules of α-complex with the liberation of one proton.
Yttrium forms with CPApM a 1:2 α-complex instantaneously in acidic medium.At pH～ (buffer solution),the α-complex is transformed to a β-complex with an absorption peak at 755 nm after standing.The transformation reaction is a first-order reaction.The rate constant and the apparent activation energy were found to be 9.67×10^(-) min^(-1) and 52.3 kJ·mol^(-1) respectively.The mechanism of the reaction shows that the β-complex(Y:CPApM=2:4)is formed by combining two molecules of α-complex with the liberation of one proton.
