The Triplet State of Ketones in Solution: The Role of the Charge Transfer State in the Quenching of Triplet Acetone by Aromatic Molecules

1973 ◽  
Vol 51 (11) ◽  
pp. 1881-1884 ◽  
Author(s):  
R. O. Loutfy ◽  
R. W. Yip
Keyword(s):  
Energy Transfer ◽  
Charge Transfer ◽  
Energy Difference ◽  
Charge Transfer State ◽  
Triplet Energy ◽  
Excited Triplet ◽  
Aromatic Molecules ◽  
Triplet Energy Transfer ◽  
Transfer State

The rate constants for quenching of triplet acetone by a series of halobenzenes have been determined by flash emission technique. Quenching was found to be approximately a hundred times faster than that for triplet benzophenone. For both triplet ketones, quenching did not decrease with the increase in triplet energy difference between ketone and quencher (as expected for normal endothermic triplet energy transfer) and did not correlate with the i.p. of all of the quenchers studied. All of the qualitative features of the quenching results can be simply interpreted in terms of enhanced coupling of the locally excited triplet ketone and quencher states as a result of interaction with the charge transfer state.

The Role of the Ligand-to-Metal Charge-Transfer State in the Dipivaloylmethanate-Lanthanide Intramolecular Energy Transfer Process

2015 ◽  
Vol 2015 (18) ◽  
pp. 3019-3027 ◽  
Author(s):  
Yolanda C. Miranda ◽  
Leide L. A. L. Pereira ◽  
José H. P. Barbosa ◽  
Hermi F. Brito ◽  
Maria C. F. C. Felinto ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Charge Transfer ◽  
Transfer Process ◽  
Energy Transfer Process ◽  
Charge Transfer State ◽  
Intramolecular Energy Transfer ◽  
Metal Charge ◽  
Metal Charge Transfer ◽  
Transfer State

Role of charge transfer state and host matrix in Eu3+-doped alkali and earth alkali fluoro-aluminoborate glasses

2012 ◽  
Vol 34 (8) ◽  
pp. 1477-1481 ◽  
Author(s):  
N.T. Thanh ◽  
V.X. Quang ◽  
V.P. Tuyen ◽  
N.V. Tam ◽  
T. Hayakawa ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Charge Transfer State ◽  
Host Matrix ◽  
Transfer State

Role of Ligand-to-Metal Charge Transfer State in Nontriplet Photosensitization of Luminescent Europium Complex

2010 ◽  
Vol 114 (13) ◽  
pp. 4494-4500 ◽  
Author(s):  
Li-Min Fu ◽  
Xi-Cheng Ai ◽  
Man-Yu Li ◽  
Xiao-Fan Wen ◽  
Rui Hao ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Europium Complex ◽  
Charge Transfer State ◽  
Metal Charge ◽  
Metal Charge Transfer ◽  
Transfer State

scholarly journals Mechanisms of triplet energy transfer across the inorganic nanocrystal/organic molecule interface

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Xiao Luo ◽  
Yaoyao Han ◽  
Zongwei Chen ◽  
Yulu Li ◽  
Guijie Liang ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Charge Transfer ◽  
Organic Molecule ◽  
Transient Absorption ◽  
High Energy ◽  
Model Systems ◽  
Trap States ◽  
Triplet Energy ◽  
Surface Trap ◽  
Triplet Energy Transfer

AbstractThe mechanisms of triplet energy transfer across the inorganic nanocrystal/organic molecule interface remain poorly understood. Many seemingly contradictory results have been reported, mainly because of the complicated trap states characteristic of inorganic semiconductors and the ill-defined relative energetics between semiconductors and molecules used in these studies. Here we clarify the transfer mechanisms by performing combined transient absorption and photoluminescence measurements, both with sub-picosecond time resolution, on model systems comprising lead halide perovskite nanocrystals with very low surface trap densities as the triplet donor and polyacenes which either favour or prohibit charge transfer as the triplet acceptors. Hole transfer from nanocrystals to tetracene is energetically favoured, and hence triplet transfer proceeds via a charge separated state. In contrast, charge transfer to naphthalene is energetically unfavourable and spectroscopy shows direct triplet transfer from nanocrystals to naphthalene; nonetheless, this “direct” process could also be mediated by a high-energy, virtual charge-transfer state.

scholarly journals Sensitization of ultra-long-range excited-state electron transfer by energy transfer in a polymerized film

2012 ◽  
Vol 109 (38) ◽  
pp. 15132-15135 ◽  
Author(s):  
Akitaka Ito ◽  
David J. Stewart ◽  
Zhen Fang ◽  
M. Kyle Brennaman ◽  
Thomas J. Meyer
Keyword(s):  
Electron Transfer ◽  
Energy Transfer ◽  
Excited State ◽  
Charge Transfer ◽  
Long Range ◽  
Methyl Viologen ◽  
Polymer Network ◽  
Triplet Energy ◽  
Ligand Charge Transfer ◽  
Triplet Energy Transfer

Distance-dependent energy transfer occurs from the Metal-to-Ligand Charge Transfer (MLCT) excited state to an anthracene-acrylate derivative (Acr-An) incorporated into the polymer network of a semirigid poly(ethyleneglycol)dimethacrylate monolith. Following excitation, to Acr-An triplet energy transfer occurs followed by long-range, Acr-3An—Acr-An → Acr-An—Acr-3An, energy migration. With methyl viologen dication (MV2+) added as a trap, Acr-3An + MV2+ → Acr-An+ + MV+ electron transfer results in sensitized electron transfer quenching over a distance of approximately 90 Å.

Role of contact complexes in singlet-triplet energy transfer

1988 ◽  
Vol 48 (3) ◽  
pp. 318-322 ◽  
Author(s):  
N. Kh. Ibraev ◽  
G. A. Ketsle ◽  
L. V. Levshin ◽  
Yu. A. Soinikov
Keyword(s):  
Energy Transfer ◽  
Triplet Energy ◽  
Triplet Energy Transfer
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