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

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 Thionation Induces Efficient Generation of Excited Triplet State and Singlet Oxygen: Heavy Atom-Free BODIPY Photosensitizers Based on S1(n,π*) State

2020 ◽  
Author(s):  
Wenbin Hu ◽  
XIan-Fu Zhang ◽  
Mingyu Liu
Keyword(s):  
Excited State ◽  
Quantum Yield ◽  
Triplet State ◽  
Singlet Oxygen ◽  
Efficient Method ◽  
Heavy Atom ◽  
Excited Triplet State ◽  
Excited Triplet ◽  
Efficient Generation ◽  
Π State

The attachement of SR (R is alkyl or phenyl) makes BODIPY efficiently generate excited triplet state (T<sub>1</sub>) and singlet oxygen with quantum yield up to 0.82 (compared to 0.10 of parent BODIPY). This affords an efficient method to synthesize heavy atom free photosensitizers. This efficient T<sub>1</sub> formation is because SR presence leads to a new excited state S<sub>1</sub>(n,pi*) with an energy smaller but close to the usual S<sub>1</sub>(pi,pi*) state.

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