Abstract:

Polyamidoamine (PAMAM) dendrimers of G3. 5 and G4. 0 were synthesized by means of the divergent method. The effects of the dendrimer generation , the molar ratio of dendrimer to C0²⁺ , the pH value of the solu-tion, the reaction time and the temperature on the interaction between polyamidoamine dendrimers and C0²⁺ were then investigated. The results indicate that (1) the maximum absorption wavelength of PAMAMG4. 0/C0²⁺ solution appears at 356 nmr,while the PAMAM G3.5/C0²⁺ solution seldom shows light absorption in visibls spectrum,(2) the absorbency of PAMAM G4. 0/C0²⁺  solution at 356nm increases when the molar ratio of PAMAM G4. 0 to C0²⁺ changes from 1: 10 to 1: 30 , and the same phenomenon can be observed when increasing the reaction time , and ( 3) both the pH value of the solution and the reaction temperature greatly inf1uence the interaction between poly-amidoamine dendrimers and C0²⁺  •

Key words: spectrophotometrγ, dendrimer, C0²⁺ , interaction