Zeolite energy transfer

Ramamurthy, V., Lakshminarasimhan, P., Grey, C.P. and Johnston, L.J. (1998). Energy transfer, proton transfer and electron transfer reactions within zeolites. J. Chem. Soc. Chem. Commun. 2411-2424... 

The visual proof of energy transfer in this experiment is based on the observation that Py+ and Ox+ are incorporated into zeolite L from an aqueous solution with about equal rates. It is therefore possible to control the mean distance between donors D and acceptors A by varying the occupation probability. The main processes are energy transfer and luminescence as illustrated in Figure 1.27. Energy... 

The energy transfer between donors Py+ and acceptors Ox+ can be used for observing the one dimensional diffusion kinetics of these dyes inside the zeolite... 

L channels. We assume that in all channels a situation can be prepared as illustrated in Figure 1.30, at the beginning of the experiment. Immediately after all dye molecules have entered the zeolite channels, the maximum energy transfer is observed because the donor-to-acceptor distance is short. The donor-to-acceptor distance increases, and hence the energy-transfer rate decreases, when the molecules diffuse deeper into the channels. From this, the following relation for diffusion kinetics is found under the condition that the initial distributions of the donors and the acceptors are the same, [)py+ p x+, denoted as p°. Experimental details can be found in [77],... 

Figure 27 Sensitized solar cell based on dye-loaded zeolite L antenna systems. The antenna systems absorb light and transport their energy mainly along the c axis of the crystals to the semiconductor surface. Electron-hole pairs are formed in the semiconductor by energy transfer from the antenna system to the conduction band of the semiconductor.

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