Dendrimers depolarization

From time-resolved fluorescence depolarization measurements, the anisotropy decay times (0) and the associated anisotropy ([>) have been determined for all first generation dendrimers using Eq.(l) ... 

From fluorescence depolarization measurements, anisotropy relaxation times and the associated anisotropy values have been determined for p-C2P1 p-C2P2, p-C2P3, and / -C2P. For the dendrimers with more than one chromophore, a two-exponen-tial function was found to be necessary to fit the experimental anisotropy decay traces (Table 1.2). The multichromophoric dendrimers present two-exponential decays in the anisotropy traces. The fast component (410 ps to 280 ps) of the anisotropy decay (Table 1.2) is found to decrease from p-C2P2 to p-C2P4. Contrary to the meta-substituted dendrimers m-C 1 P , the sum of the / , is now always close to the limiting value of the anisotropy even if 11 is larger than one. 

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