N-hetero atomic effect on the photophysics of 2,2′-dipyridylketone

Excited Electronic States and Raman Spectra of 2-Benzoylpyridine

“…It is now known that critical analyses of REPs of different normal modes provide valuable information about molecules in their ground and excited electronic states. 17–19,30,31,35 For this, a prior knowledge of the nature of different normal modes of vibration is necessary. Therefore along with the investigation of REPs, critical analyses of the infrared and polarized Raman bands of the molecule were carried out.…”

“…The case becomes more complicated, but somewhat more interesting, if along with the nonbonding (n-) electrons of the ring nitrogen atom(s), nonbonding electrons are also present in other atoms of the substituent group(s) to the ring. 17 Conformational properties of such molecules depend not only on the nature of the substituent and the surrounding environment, but also on the position of the substituent with respect to the ring heteroatom. Photophysical and photochemical behaviors of such molecules can be understood with much elegance if knowledge of their geometrical and electronic structural properties in the ground and excited electronic states is acquired.…”

“…On the other hand, HT scattering may unravel many interesting features of excited electronic states, such as natures, symmetries, vibronic couplings, decay mechanisms, etc. 17–19…”