The influence of triplet energy levels of bridging ligands on energy transfer processes in Ir(iii)/Eu(iii) dyads

2011 ◽  
Vol 40 (43) ◽  
pp. 11410 ◽  
Author(s):  
Weili Jiang ◽  
Bin Lou ◽  
Jianqiang Wang ◽  
Hongbin Lv ◽  
Zuqiang Bian ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Energy Levels ◽  
Triplet Energy ◽  
Bridging Ligands ◽  
Transfer Processes

Kinetic and statistical features of triplet energy transfer processes in micellar assemblies

1979 ◽  
Vol 83 (14) ◽  
pp. 1871-1876 ◽  
Author(s):  
Guido. Rothenberger ◽  
Pierre P. Infelta ◽  
Michael. Graetzel
Keyword(s):  
Energy Transfer ◽  
Statistical Features ◽  
Triplet Energy ◽  
Transfer Processes ◽  
Triplet Energy Transfer

Very fast singlet and triplet energy transfers in a tri-chromophoric porphyrin dyad aided by the truxene platform

2015 ◽  
Vol 19 (01-03) ◽  
pp. 427-441 ◽  
Author(s):  
Adam Langlois ◽  
Hai-Jun Xu ◽  
Paul-Ludovic Karsenti ◽  
Claude P. Gros ◽  
Pierre D. Harvey
Keyword(s):  
Energy Transfer ◽  
Electron Exchange ◽  
Triplet Energy ◽  
Transfer Rates ◽  
Transfer Processes ◽  
Energy Transfers ◽  
Donor And Acceptor ◽  
Double Electron ◽  
Fast Rates

A trichromophoric dyad composed of an octa-β-alkyl-palladium(II)porphyrin (donor) and two tri-meso-aryl-zinc(II)porphyrins (acceptors) held by a truxene spacer exhibits very fast rates for triplet energy transfers at 77 (kET(T1) = 1.63 × 108 s-1) and 298 K (kET(T1) = 3.44 × 108 s-1), whereas the corresponding singlet energy transfer rates, kET(S1) = 3.9 × 1010 s-1 (77 K) and kET(S1) = 6.0 × 1010 s-1 (298 K), are also considered fast. The interpretation for these results is that the energy transfer processes proceed via a through bond Dexter mechanism (i.e. double electron exchange) supported by comparison with literature data and evidence for a moderate MO coupling between the donor and acceptor chromophores in the frontier MOs.

Energy transfer from the triplet state

1961 ◽  
Vol 264 (1316) ◽  
pp. 1-18 ◽  
Keyword(s):  
Energy Transfer ◽  
Triplet State ◽  
Singlet Ground State ◽  
Triplet Energy ◽  
Transfer Processes ◽  
Diffusion Controlled ◽  
Donor And Acceptor ◽  
Donor Acceptor ◽  
Transfer Probability ◽  
Resonance Transfer

Energy transfer from the triplet level of a donor molecule resulting in quenching of the donor and elevation of the acceptor molecule from its singlet ground state to a triplet state has been observed between a number of donor-acceptor pairs in fluid solvents. In most cases the mechanism of the transfer has been unequivocally established by observation of the triplet state absorption spectra of both species. Energy transfer from excited singlet donors to the triplet state of the acceptor is not observed. When the energy of the acceptor triplet is considerably lower than that of the donor, transfer is diffusion-controlled but there is no evidence for long-range resonance transfer of the kind found in the analogous singlet energy transfer processes. As the triplet energies become comparable the transfer probability is reduced and no quenching is observed by molecules with triplet levels higher than that of the donor. Transfer of triplet energy between pairs of aromatic hydrocarbons has been illustrated and it has been established that complex formation between donor and acceptor cannot be important under the conditions of these experiments.

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