TY - JOUR
T1 - Fluorescence quenching of Y-4,9-dihydro-4,6-dimethyl-9-oxo-1H-imidazo-1,2-a purine (Yt base) and the model compounds Yt(CH2)nadenine by α-bromonaphthalene
AU - Gryczyński, I.
AU - Kawski, A.
AU - Paszyc, S.
AU - Skalski, B.
N1 - Funding Information:
This work was supported by the Polish Academy of Sciences Projects 09.7.1.1.7 and MR. 1.5.2.01.
PY - 1982
Y1 - 1982
N2 - The fluorescence quenching of Y-4,9-dihydro-4,6-dimethyl-9-oxo-1H-imidazo-1,2-a purine (Yt base) and of some model compounds Yt(CH2)nadenine (n = 2, 3, 5) by α-bromonaphthalene was studied in various solvents. The dependence of the ratio k/kd (where k is the rate constant for energy transfer from Yt to α-bromonaphthalene and kd is the diffusion rate constant) on the integrated overlap of the Yt fluorescence and the singlet-triplet absorption of α-bromonaphthalene was linear. The constant k for the model compounds varied with the length of the polymethylene chain and attained its lowest value for n = 3. This is probably due to an increased degree of base stacking interaction in the trimethylene-bridged compound.
AB - The fluorescence quenching of Y-4,9-dihydro-4,6-dimethyl-9-oxo-1H-imidazo-1,2-a purine (Yt base) and of some model compounds Yt(CH2)nadenine (n = 2, 3, 5) by α-bromonaphthalene was studied in various solvents. The dependence of the ratio k/kd (where k is the rate constant for energy transfer from Yt to α-bromonaphthalene and kd is the diffusion rate constant) on the integrated overlap of the Yt fluorescence and the singlet-triplet absorption of α-bromonaphthalene was linear. The constant k for the model compounds varied with the length of the polymethylene chain and attained its lowest value for n = 3. This is probably due to an increased degree of base stacking interaction in the trimethylene-bridged compound.
UR - http://www.scopus.com/inward/record.url?scp=49049136720&partnerID=8YFLogxK
U2 - 10.1016/0047-2670(82)80048-8
DO - 10.1016/0047-2670(82)80048-8
M3 - Article
AN - SCOPUS:49049136720
SN - 0047-2670
VL - 20
SP - 71
EP - 76
JO - Journal of Photochemistry
JF - Journal of Photochemistry
IS - 1
ER -