Spectrophotometric and thermodynamic studies on the 1:1 charge transfer interaction of several clinically important drugs with tetracyanoethylene in solution-state: Part one

The investigated drugs differ in their spectral absorption response towards a TCNE acceptor. Some drugs show one strong absorption band and one maximum band, while others show two maxima. The splitting in the latter could be attributed to the existence of two interaction modes within the complex (n → π* and π → π*).137