Internal heavy atom effect on the radiative and non-radiative rate constants in xanthene dyes

1979 ◽  
Vol 21 (1) ◽  
pp. 111-118 ◽  
Author(s):  
N.B. Joshi ◽  
P. Gangola ◽  
D.D. Pant
Keyword(s):  
Rate Constants ◽  
Heavy Atom ◽  
Xanthene Dyes ◽  
Heavy Atom Effect ◽  
Radiative Rate ◽  
Atom Effect

The heavy-atom effect on xanthene dyes for photopolymerization by visible light

2019 ◽  
Vol 10 (42) ◽  
pp. 5737-5742 ◽  
Author(s):  
Jieun Yoon ◽  
Young Jae Jung ◽  
Joon Bo Yoon ◽  
Kongara Damodar ◽  
Hyungwook Kim ◽  
...  
Keyword(s):  
Visible Light ◽  
Heavy Atom ◽  
Catalytic Performance ◽  
Xanthene Dyes ◽  
Heavy Atom Effect ◽  
Halogen Atoms ◽  
Atom Effect

Heavy halogen atoms on the xanthene ring significantly increase the photoredox catalytic performance for visible-light-induced photopolymerization.

Photolysis of quinonediazides in cyclohexane formation of coloured adduct, heavy atom effect

1979 ◽  
Vol 44 (6) ◽  
pp. 1772-1778 ◽  
Author(s):  
Viktor Řehák ◽  
Jaroslav Poskočil ◽  
Ivo Dvořáček
Keyword(s):  
Quantum Yield ◽  
Rate Constants ◽  
Heavy Atom ◽  
Heavy Atom Effect ◽  
Atom Effect ◽  
Influence Of Solvent ◽  
The Way

Photolysis of 1,2-naphthoquinone-1-diazide and 9,10-phenathrenequinonediazide in cyclohexane gives coloured products decomposing on further irradiation. Formation of the products and their concentration depends on the way of irradiation (short, continuous) and on the presence of 1-propanol in the solution. The products are presumed to be adducts of ketene with the starting quinonediazides. Rate constants of their formation have been determined. Influence of solvent containing a heavy atom (1-bromopropane, iodoethane) on quantum yield of the photolysis and influence of oxygen have been investigated.

Achieving high singlet-oxygen generation by applying the heavy-atom effect to thermally activated delayed fluorescent materials

2021 ◽  
Author(s):  
Ya-Fang Xiao ◽  
Jia-Xiong Chen ◽  
Wen-Cheng Chen ◽  
Xiuli Zheng ◽  
Chen Cao ◽  
...  
Keyword(s):  
Singlet Oxygen ◽  
Heavy Atom ◽  
Synergetic Effect ◽  
Heavy Atom Effect ◽  
Oxygen Generation ◽  
Thermally Activated ◽  
Singlet Oxygen Generation ◽  
Fluorescent Materials ◽  
Atom Effect

Applying the heavy-atom effect to TADF photosensitizers achieves ultra-high 1O2 generation (ФΔ = 0.91) by the synergetic effect of small ΔEST and considerable SOC.

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

scholarly journals Etude par résonance magnétique nucléaire de composés organiques contenant des chalcogènes. II. L'éther de diphényle et ses analogues soufré, sélénié et telluré

1979 ◽  
Vol 57 (22) ◽  
pp. 2967-2970 ◽  
Author(s):  
Gabriel Llabrès ◽  
Marcel Baiwir ◽  
Léon Christiaens ◽  
Jean-Louis Piette
Keyword(s):  
Crystal Structure ◽  
Theoretical Calculations ◽  
Heavy Atom ◽  
Mesomeric Effect ◽  
Heavy Atom Effect ◽  
Inductive Effects ◽  
Structure Determinations ◽  
Résonance Magnétique ◽  
Atom Effect ◽  
Good Agreement

The 1Hmr study of the title compounds has revealed a screw conformation, with defined interconversion processes, in good agreement with crystal structure determinations and theoretical calculations. The mesomeric effect of the heteroatom is smaller than in the anisole series, due to steric inhibitions.The 13Cmr enhances, to some extent, these conclusions. In the case of Te compounds, a heavy atom effect adds to the classical mesomeric and inductive effects to account for the experimental observations.

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