CADMIUM(5P-3(1))-PHOTOSENSITIZED LUMINESCENCE OF SOME COMPOUNDS CONTAINING 3 DONOR ATOMS

The cadmium photosensitized luminescence of some compounds containing three donor atoms (N and/or O) has been investigated by the steady illumination method at temperatures between 453 and 553 K. Broad emission spectra in the visible region were observed with diethylenetriamine (DETA), dipropylenetriamine (DPTA), bis-(2-methoxyethyl) ether (BMOEE), bis-2-methoxyethylamine (BMOEA), and bis-(dimethylaminoethyl) ether (BDAEE). By comparing each of these spectra with the spectra of the corresponding bifunctional compounds, we can resolved these spectra into three component bands for DETA, DPTA, BMOEE, and BMOEA, and into four component bands for BDAEE. The longest wavelength bands were observed for the first time. They can be assigned to different types of 1:1 exciplexes (acyclic, monocyclic, and bicyclic). The enthalpy changes of the chelations were evaluated from the temperature dependences of the intensities of the bands and were found to depend on the type of chelating atom.