APPROACHES TO EMPIRICAL DONOR-ACCEPTOR AND POLARITY-PARAMETERS OF POLYMERS IN SOLUTION AND AT INTERFACES

The application of several dyes, such as 4,4'-Bis-N,N-dimethylamino-benzophenone (1), dicyano-bis(1,10-phenanthrolin) iron II (2), and the Pyridium-phenolate betaine E(T) [30] (3) is demonstrated to estimate empirical donor-acceptor and polarity parameters of several inorganic solids, polymers and combination of both. The method employed is based, on a correlation analysis of the UV/VIS spectral data of the probe dyes in more than 70 protic and nonprotic solvents versus the acceptor numbers (AN) of Gutmann as well as to the multiparameter approach of Kamlet and Taft using the alpha, beta and pi* scales. The determination of the acceptor number AN and acidity alpha and dipolarity-polarizability pi* for several compounds (inorganic oxides, cellulose derivatives) is discussed.