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Spectrophotometric behavior of polyvinylpyrrolidone in aqueous and nonaqueous media (I)

Türker, , Lemi
Güner, Alev
Yigit, F. Pinar
Güven, O.
Electronic spectral behavior of polyvinylpyrrolidone solutions in various media has been determined by UV-VIS spectrophotometry. A theoretical approach has been developed to explain the experimentally observed concentration dependent spectral behavior of polyvinyl pyrrolidone in aqueous and nonaqueous solvents. Increase in the concentration of the polymer or the addition of guanidine salts caused bathochromic shift. A similar concentration effect has been observed in nonaqueous media in the absence of guanidine salts.