FLUORESCENCE STUDIES OF THE COIL TO GLOBULE TRANSITION OF ACENAPHTHYLENE LABELED POLY(N,N-DIETHYLACRYLAMIDE) IN DILUTE AQUEOUS UREA SOLUTION

摘要

@@In general, the coil to globule transition (CGT) would occur in a very small temperature interval for long stiff polymer chains but span over a broad temperature interval for short flexible chains.[1] However, there is a lack of quantitative information regarding the changes of the mobility of the chain occurring in the CGT.[2] Fluorescence techniques, including quenching and anisotropy measurements, [3,4] have been used to study the effects of urea on the conformational behavior of acenaphthylene labeled poly (N, N-diethylacrylamide) (PDEA/ACE) in dilute aqueous solution.