TY - JOUR
T1 - Intramolecular donor-acceptor systems. 7. Solvent dielectric relaxation effects on the photophysics of 6-(phenylamino)-N,N-dimethyl-2-naphthalenesulfonamides
AU - Kosower, E. M.
AU - Kanety, H.
AU - Dodiuk, H.
AU - Striker, G.
AU - Jovin, T.
AU - Boni, H.
AU - Huppert, D.
PY - 1983
Y1 - 1983
N2 - Excitation of 6-[(4-X-phenyl)amino]-N,N-dimethyl-2-naphthalenesulfonamides (X = Br, H, CH3, OCH3) produces a nonplanar S1 (S1,np) state which undergoes intramolecular electron transfer in a wide polarity range of solvents to form a charge-transfer S1 state (S1,ct), the processes being defined by emission maxima and fluoroescence quantum yields as a function of solvent polarity and phenyl substituent. From the variation of fluorescence lifetimes with solvent polarity using dioxane-water and dioxane-methanol mixtures, solvent dielectric relaxation rates are implicated as the controlling feature for the nonradiative electron-transfer process which quenches the charge-transfer fluorescence and reforms the S0 state.
AB - Excitation of 6-[(4-X-phenyl)amino]-N,N-dimethyl-2-naphthalenesulfonamides (X = Br, H, CH3, OCH3) produces a nonplanar S1 (S1,np) state which undergoes intramolecular electron transfer in a wide polarity range of solvents to form a charge-transfer S1 state (S1,ct), the processes being defined by emission maxima and fluoroescence quantum yields as a function of solvent polarity and phenyl substituent. From the variation of fluorescence lifetimes with solvent polarity using dioxane-water and dioxane-methanol mixtures, solvent dielectric relaxation rates are implicated as the controlling feature for the nonradiative electron-transfer process which quenches the charge-transfer fluorescence and reforms the S0 state.
UR - http://www.scopus.com/inward/record.url?scp=0001209745&partnerID=8YFLogxK
U2 - 10.1021/j100237a010
DO - 10.1021/j100237a010
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AN - SCOPUS:0001209745
SN - 0022-3654
VL - 87
SP - 2479
EP - 2484
JO - Journal of Physical Chemistry
JF - Journal of Physical Chemistry
IS - 14
ER -