Energy Transfer in Assembled Systems

The population of the exeited states of a lanthanide ion can be achieved via several mechanisms. The diagram in Fig. 9.19 shows only some of the pathways leading to lanthanide-centred luminescence (see also Chapter 1). In the early years of the study of 

A sequential double electron transfer mechanism can also be invoked where it is thermodynamically feasible. The free energy dependence of the photoinduced electron transfer can be expressed (in eV) by the following equation [71]  

Subtle aspects during the design of the ii-/hybrid architecture can lead to a fine-tuning of the lanthanide centred luminescence. By exploiting this principle Piguet, Biinzli and 

This is the first example of communication between two lanthanide ions present in the same molecule. Indeed the energy transfer is assisted by a favourable energy overlap and by the chemical stmcture that allows the two metal centres to be in close proximity. Here, selective excitation of the 04 state of Tb resulted in sensitised luminescence from Yb at 980 nm [77]. 

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