N-hetero atomic effect on the photophysics of 2,2'-dipyridylketone.
Emission characteristics of 2,2'-dipyridylketone (DPK) have been studied in the rigid glass matrices of ethanol (EtOH) and methyl cyclohexane (MCH) at 77 K. As in the case of the aromatic analogue benzophenone (BOP), DPK is found to exhibit only phosphorescence emission. Although both BOP and DPK have the lowest triplet states chiefly of n pi* nature, the presence of other triplet states in the neighbourhood of the lowest triplet one is found to play some significant roles in determining the photophysical properties of DPK, specially in the non-polar solvent (MCH). All the photophysical properties including the polarization characteristics have been explored in both the molecules. Experimental observations are corroborated with necessary quantum chemical calculations.
Mishra
Tumpa
T
Physics Department, Burdwan University, Golapbag, Burdwan 713 104, India.
Bhattacharya
Sudeshna
S
Ghosh
Manash
M
Sett
Pinaky
P
Sarkar
Susil Kumar
SK
Ganguly
Tapan
T
Mallick
Prabal Kumar
PK
D015082:2,2'-Dipyridyl / Q000031:analogs & derivatives* / Q000737:chemistry; D000042:Absorption; D016880:Anisotropy; D001577:Benzophenones / Q000737:chemistry; D004583:Electrons; D000431:Ethanol / Q000737:chemistry; D008163:Luminescent Measurements; D010777:Photochemistry; D012997:Solvents; D013057:Spectrum Analysis; D013816:Thermodynamics; D013997:Time Factors
C418768:2,2'-dipyridylketone; D001577:Benzophenones; D012997:Solvents; D000431:Ethanol; D015082:2,2'-Dipyridyl