Intramolecular Triplet‐Triplet Energy Transfer in Polyadenylic Acids: The Influence of Triplet Energy Trapping on the Decay Kinetics of Delayed Fluorescence Produced by a Triplet‐Triplet Annihilation

1972 ◽  
Vol 57 (1) ◽  
pp. 399-408 ◽  
Author(s):  
Claude Helene ◽  
J. W. Longworth
Keyword(s):  
Energy Transfer ◽  
Delayed Fluorescence ◽  
Decay Kinetics ◽  
Triplet Energy ◽  
Energy Trapping ◽  
Triplet Energy Transfer ◽  
Kinetics Of ◽  
Triplet Triplet Annihilation

P-Typ-verzögerte Fluoreszenz von 1-Naphthyl-9-carbazyl-methan

1986 ◽  
Vol 41 (7) ◽  
pp. 971-973
Author(s):  
Maximilian Zander
Keyword(s):  
Energy Transfer ◽  
Filter Paper ◽  
Light Absorption ◽  
Delayed Fluorescence ◽  
Triplet Energy ◽  
Experimental Findings ◽  
Triplet Energy Transfer ◽  
Step Mechanism ◽  
Triplet Triplet Annihilation

P-tvpe Delayed Fluorescence o f 1-Naphthyl-9-carbazyl-methane At 77 K 1-naphthyl-9-carbazyl-methane adsorbed on filter paper shows predominantly delayed fluorescence o f the carbazole chromophore. The experimental findings are in agreement with the assumption that the carbazole chromophore after excitation by light absorption becomes first deactivated by intramolecular triplet-triplet energy transfer and then re-excited in a two-step mechanism including intermolecular naphthalene triplet-triplet annihilation and intramolecular singlet-singlet energy transfer from the naphthalene to the carbazole chromophore.

Exciton Phosphorescence of p-Terphenyl Crystal at 300 K

1980 ◽  
Vol 35 (8) ◽  
pp. 823-827 ◽  
Author(s):  
Eizi Morikawa ◽  
Masahiro Kotani
Keyword(s):  
Energy Transfer ◽  
Absorption Coefficient ◽  
Phosphorescence Spectrum ◽  
Delayed Fluorescence ◽  
Triplet Energy ◽  
Diffusion Limited ◽  
Exciton Lifetime ◽  
Glassy Solution ◽  
Vibrational Progression ◽  
Triplet Energy Transfer

Abstract Exciton phosphorescence from pure p-terphenyl crystals was observed at 300 K. The 0-0 band of the phosphorescence spectrum was found at 20.4 X 103 cm-1 . The vibrational progression of 1.46 x 103 cm-1 is present. The maximum exciton lifetime observed was 200 ms. The excitation spectrum of the exciton phosphorescence differs considerably from that observed in glassy solution, but is poorly structured as well. The absorption coefficient near the origin is small. The absence of sensitized delayed fluorescence from doped tetracene suggests that the triplet energy transfer to this guest is not diffusion limited.

Triplet–triplet annihilation upconversion through triplet energy transfer at a nanoporous solid–liquid interface

2020 ◽  
Vol 22 (32) ◽  
pp. 17807-17813
Author(s):  
Toshiko Mizokuro ◽  
Aizitiaili Abulikemu ◽  
Kengo Suzuki ◽  
Yusuke Sakagami ◽  
Ritsuki Nishii ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Liquid Interface ◽  
Triplet Energy ◽  
Nanoporous Glass ◽  
Solid Liquid Interface ◽  
Solid Liquid ◽  
Triplet Energy Transfer ◽  
Triplet Triplet Annihilation

Photon upconversion and the triplet energy transfer dynamics were studied for sensitizer-fixed nanoporous glass immersed in emitter solution.

Electrochemically triggered upconverted luminescence for light-emitting devices

2019 ◽  
Vol 55 (84) ◽  
pp. 12611-12614 ◽  
Author(s):  
Haruki Minami ◽  
Takuya Ichikawa ◽  
Kazuki Nakamura ◽  
Norihisa Kobayashi
Keyword(s):  
Energy Transfer ◽  
Triplet Energy ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Triplet Energy Transfer ◽  
First Time ◽  
Triplet Triplet Annihilation

Electrochemically triggered upconverted luminescence through triplet–triplet energy transfer (TTET) and subsequent triplet–triplet annihilation upconversion (TTA-UC) is observed for the first time.

H2O2-activated triplet–triplet annihilation upconversion via modulation of the fluorescence quantum yields of the triplet acceptor and the triplet–triplet-energy-transfer efficiency

2015 ◽  
Vol 51 (62) ◽  
pp. 12403-12406 ◽  
Author(s):  
Renjie Tao ◽  
Jianzhang Zhao ◽  
Fangfang Zhong ◽  
Caishun Zhang ◽  
Wenbo Yang ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Energy Transfer Efficiency ◽  
Transfer Efficiency ◽  
Quantum Yields ◽  
Fluorescent Product ◽  
Triplet Energy ◽  
Fluorescence Quantum Yields ◽  
Triplet Energy Transfer ◽  
Triplet Triplet Annihilation

H2O2-activatable TTA upconversion was achieved with non-fluorescent 9,10-bis(diphenylphosphino)anthracene as a triplet acceptor/emitter, which can be oxidized to a fluorescent product by H2O2.

Achieving high power efficiency and low roll-off OLEDs based on energy transfer from thermally activated delayed excitons to fluorescent dopants

2015 ◽  
Vol 51 (60) ◽  
pp. 11972-11975 ◽  
Author(s):  
Shipan Wang ◽  
Yuewei Zhang ◽  
Weiping Chen ◽  
Jinbei Wei ◽  
Yu Liu ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Power Efficiency ◽  
High Efficiency ◽  
Delayed Fluorescence ◽  
Triplet Energy ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
External Power ◽  
Triplet Energy Transfer

A high-efficiency fluorescent organic light-emitting device with a maximum external power efficiency (PE) of 53.4 lm W−1 was fabricated through efficient triplet energy transfer from a thermally activated delayed fluorescence (TADF) host to conventional fluorescent dopants.

scholarly journals Liquid and frozen multilayers of decanol in zeolites as microreactors for direct and oxygen mediated triplet-triplet annihilation of porphyrin

2002 ◽  
Vol 4 (4) ◽  
pp. 161-171 ◽  
Author(s):  
Peter P. Levin ◽  
Silvia M. B. Costa
Keyword(s):  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Solubility Limit ◽  
Delayed Fluorescence ◽  
Supramolecular Organization ◽  
Local Concentration ◽  
Triplet Energy ◽  
Kinetics Of ◽  
Triplet Triplet Annihilation

The kinetics of triplet state decay and concomitant delayed fluorescence of tetraphenylporphyrin (TPP) incorporated into the multilayers of n-decanol adsorbed on the external surface of zeolites at different temperatures were studied by the laser flash photolysis via monitoring the emission and diffuse-reflectance. In deoxygenated samples, the kinetics of diffusion-controlled bimolecular triplet-triplet annihilation (TTA) has been used to probe the multilayers. A very large local concentration of reactants may be obtained using small bulk amounts. A fast TTA rate constant demonstrated the triplet energy migration in TPP assemblies formed at the liquid/solid interface. The TTA in aerated samples is mediated by molecular oxygen leading to1O2feedback—induced delayed fluorescence. Singlet oxygen works as an efficient mobile energy carrier between TPP triplets. The parameters of both TTA may be modified by multilayer, which acts as microreactor with supramolecular organization. The freezing of n-decanol results in dramatic apparent acceleration of both direct and1O2mediated TTA due to the increase in local TPP concentration because of displacement of TPP molecules into the residual liquid domains in polycrystalline matrix. The concentration of TPP in those microreactors can be three orders of magnitude larger than the solubility limit in a particular neat liquid solvent demonstrating the unique features of solid solution, which seems to be due to the presence of crystal/liquid interfaces.

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