TY - JOUR
T1 - The fractal nature of the surfaces of porous silicas as revealed in electronic energy transfer between adsorbates
T2 - Comparison of three donor/acceptor pairs
AU - Pines, Dina
AU - Huppert, Dan
AU - Avnir, David
PY - 1988
Y1 - 1988
N2 - Electronic energy transfer between adsorbed rhodamine 6G (R6G, donor) and malachite green (MG, acceptor) was studied on nonporous silica, on silica with average pore diameter of 60 Å (Si-60), on Si-100 and on Si-200. The decay profiles obey the Klafter-Blumen equation for the survival probability in fractal environments, with fractal dimensions D of 2.1, 2.3, 2.5, and 2.7, respectively, in good agreement with the results obtained with two other pairs, rhodamine-B/MG and R6G/R6G (in a depolarization experiment). The invariance of D to changes in the critical Förster radius, suggests that the derived D values reflect structural scale invariance properties of the supports and in particular the surface fractal dimension as "seen" by surface/molecule interaction. This interpretation compares favorably with other surface studies of SiO2.
AB - Electronic energy transfer between adsorbed rhodamine 6G (R6G, donor) and malachite green (MG, acceptor) was studied on nonporous silica, on silica with average pore diameter of 60 Å (Si-60), on Si-100 and on Si-200. The decay profiles obey the Klafter-Blumen equation for the survival probability in fractal environments, with fractal dimensions D of 2.1, 2.3, 2.5, and 2.7, respectively, in good agreement with the results obtained with two other pairs, rhodamine-B/MG and R6G/R6G (in a depolarization experiment). The invariance of D to changes in the critical Förster radius, suggests that the derived D values reflect structural scale invariance properties of the supports and in particular the surface fractal dimension as "seen" by surface/molecule interaction. This interpretation compares favorably with other surface studies of SiO2.
UR - http://www.scopus.com/inward/record.url?scp=0010781875&partnerID=8YFLogxK
U2 - 10.1063/1.455226
DO - 10.1063/1.455226
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AN - SCOPUS:0010781875
SN - 0021-9606
VL - 89
SP - 1177
EP - 1180
JO - The Journal of Chemical Physics
JF - The Journal of Chemical Physics
IS - 2
ER -