ChemInform Abstract: INTERNAL HEAVY-ATOM EFFECT ON THE TRIPLET SPIN SUBLEVELS OF THE LOWEST TRIPLET STATE OF NAPHTHALENE. II. INTERSYSTEM CROSSING PROCESSES FROM THE SINGLET EXCITED STATE TO THE INDIVIDUAL SPIN SUBLEVELS OF THE LOWEST TRIPLET STATE

1980 ◽  
Vol 11 (23) ◽  
Author(s):  
H. SAIGUSA ◽  
T. AZUMI ◽  
M. SUMITANI ◽  
K. YOSHIHARA
Keyword(s):  
Excited State ◽  
Triplet State ◽  
Heavy Atom ◽  
Intersystem Crossing ◽  
Singlet Excited State ◽  
Heavy Atom Effect ◽  
The Individual ◽  
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.

Competition between the heavy atom effect and vibronic coupling in donor–bridge–acceptor organometallics

2020 ◽  
Vol 22 (8) ◽  
pp. 4659-4667 ◽  
Author(s):  
Julien Eng ◽  
Stuart Thompson ◽  
Heather Goodwin ◽  
Dan Credgington ◽  
Thomas James Penfold
Keyword(s):  
Excited State ◽  
Quantum Dynamics ◽  
Heavy Atom ◽  
Vibronic Coupling ◽  
Intersystem Crossing ◽  
Heavy Atom Effect ◽  
Metal Amides ◽  
Coinage Metals ◽  
Dynamics Simulations ◽  
Atom Effect

The excited state properties and intersystem crossing dynamics of a series of donor–bridge–acceptor carbene metal-amides based upon the coinage metals Cu, Ag, Au, are investigated using quantum dynamics simulations and supported by photophysical characterisation.

Enhancement of Reverse Intersystem Crossing in Charge‐Transfer Molecule through Internal Heavy Atom Effect

2021 ◽  
pp. 2104646
Author(s):  
Hyung Suk Kim ◽  
Ja Yeon Lee ◽  
Seongjun Shin ◽  
Wonkyo Jeong ◽  
Sang Hoon Lee ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Heavy Atom ◽  
Intersystem Crossing ◽  
Heavy Atom Effect ◽  
Atom Effect

Löschung der Perylen-Fluoreszenz durch Ag+ -Ionen / Quenching of the Perylene Fluorescence by Ag+-Ions

1983 ◽  
Vol 38 (6) ◽  
pp. 698-700 ◽  
Author(s):  
H. Dreeskamp ◽  
A. Läufer ◽  
M. Zander
Keyword(s):  
Triplet State ◽  
Dynamic Process ◽  
Aromatic Compounds ◽  
Heavy Atom ◽  
Silver Ions ◽  
Intersystem Crossing ◽  
Fluid Solution ◽  
Long Wavelength ◽  
Wavelength Emission ◽  
Atom Effect

The fluorescence of perylene in fluid solution (λ0.0 = 440 nm) is quenched by silver ions in a dynamic process according to a Stern-Volmer kinetics (kq = 2 · 109 [1 • mol-1 · sec-1], in ethanol at 295 K). Simultaneously an unstructured long-wavelength emission (λmax ≈ 470 nm) appears which we assign to a perylene/Ag+ exciplex. A similar emission is observed when other polvcyclic aromatic compounds (PAC) are used, whose fluorescence as in the case of perylene is not easily quenched in an external heavy atom effect by iodopropane (kq ≦ 106). In these cases the excited PAC/Ag+ complex is long-lived enough to emit fluorescence since the intersystem crossing to the triplet system is slow due to the absence of an energetically favorable accepting triplet state

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.

Photochemical heavy-atom effect. 9. Spin-orbital effects on the excited-state cycloaddition of 5-acetoacenaphthylene to cyclopentadiene

1979 ◽  
Vol 44 (4) ◽  
pp. 514-519 ◽  
Author(s):  
Timothy E. O'Boyle ◽  
Lou J. Scott ◽  
Benjamin F. Plummer ◽  
P. S. Song
Keyword(s):  
Excited State ◽  
Heavy Atom ◽  
Spin Orbital ◽  
Heavy Atom Effect ◽  
Atom Effect
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