Internal heavy atom effect on the triplet spin sublevels of the lowest triplet state of naphthalene. I. Radiative and nonradiative decays of the spin sublevels of 1‐halonaphthalenes

1979 ◽  
Vol 71 (3) ◽  
pp. 1408-1413 ◽  
Author(s):  
Hiroyuki Saigusa ◽  
Tohru Azumi
Keyword(s):  
Triplet State ◽  
Heavy Atom ◽  
Heavy Atom Effect ◽  
Atom Effect

An exceptionally long-lived triplet state of red light-absorbing compact phenothiazine-styrylBodipy electron donor/acceptor dyads: a better alternative to the heavy atom-effect?

2020 ◽  
Vol 56 (11) ◽  
pp. 1721-1724 ◽  
Author(s):  
Yuqi Hou ◽  
Qingyun Liu ◽  
Jianzhang Zhao
Keyword(s):  
Charge Transfer ◽  
Triplet State ◽  
Electron Donor ◽  
Heavy Atom ◽  
Red Light ◽  
Intersystem Crossing ◽  
Spin Orbital ◽  
Heavy Atom Effect ◽  
Donor Acceptor ◽  
Atom Effect

Heavy atom-free dyads showing a red light-absorbing and exceptionally long-lived triplet state based on a spin–orbital charge transfer intersystem crossing mechanism.

scholarly journals Phosphoreszenzeigensch aften von Methyl-, Chlor- und Brom-Derivaten des [2.2] Paracyclophans

1987 ◽  
Vol 42 (9) ◽  
pp. 1041-1042 ◽  
Author(s):  
H. Hopf ◽  
E. Hermann
Keyword(s):  
Triplet State ◽  
Fluorescence Spectra ◽  
Heavy Atom ◽  
The Other ◽  
Quantum Yields ◽  
Heavy Atom Effect ◽  
Chloro Derivatives ◽  
Derivatives Of ◽  
Atom Effect

Phosphorescence and fluorescence spectra, quantum yields of phosphorescence and fluorescence as well as phosphorescence lifetimes have been measured of six methyl-, chloro- and bromo-derivatives of [2.2] paracyclophane in ethanol at 77 K. While the chloro-derivatives as well as dibromo-paracyclophane exhibit a normal internal heavy-atom effect behaviour the momobromo-compound shows anomalies. These possibly indicate that in the monobromo-compound an additional pathway of the radiationless deactivation of the lowest triplet state is effective which does not occur with the other compounds.

scholarly journals Heavy-atom effect on optically excited triplet state kinetics

PLoS ONE ◽  
2017 ◽  
Vol 12 (11) ◽  
pp. e0184239
Author(s):  
Christian Hintze ◽  
Tobias O. Morgen ◽  
Malte Drescher
Keyword(s):  
Triplet State ◽  
Heavy Atom ◽  
Excited Triplet State ◽  
Excited Triplet ◽  
Heavy Atom Effect ◽  
Atom Effect

Zum äußeren Schweratom-Effekt der Phosphoreszenz in nicht-fluoreszierenden aromatischen Verbindungen / The External Heavy-Atom-Effect of Phosphorescence in Non-fluorescing Aromatic Compounds

1973 ◽  
Vol 28 (11) ◽  
pp. 1869-1870
Author(s):  
M. Zander
Keyword(s):  
Triplet State ◽  
Aromatic Compounds ◽  
Heavy Atom ◽  
Quantum Yields ◽  
Naphthalene Derivatives ◽  
Heavy Atom Effect ◽  
Atom Effect

Phosphorescence quantum yields of six non-fluorescing naphthalene derivatives have been measured in ethanol and ethanol-ethylbromide 1:1 at 77 °K. The observed enhancement of phosphorescence yield of four of these in the heavy atom solvent is explained with the assumption that the rate of the phosphorescence transition is increased relatively to the radiationless desactivation of the triplet state.

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