ChemInform Abstract: Reactivity and Intersystem Crossing of Singlet Methylene in Solution.

Singlet methylene radical ((1an extented Arrhenius expression ofand futhermore rate coefficients for(7)(11)and for the intersystem crossing via(6)were determined.The experimental conditions ranged from 1900 to 4000 K with corresponding pressures between 0.23 to 0.54 bar.Theα(reflects well the experimental results obtained for the b˜

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Reactivity and intersystem crossing of singlet methylene in solution

Journal of the American Chemical Society ◽

10.1021/ja00241a030 ◽

1987 ◽

Vol 109 (7) ◽

pp. 2101-2107 ◽

Cited By ~ 27

Author(s):

Nicholas J. Turro ◽

Yuan Cha ◽

Ian R. Gould

Keyword(s):

Intersystem Crossing ◽

Singlet Methylene

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Role of intersystem crossing in the dynamics of the O(3P)+ICl reaction

Molecular Physics ◽

10.1080/00268979650027225 ◽

1996 ◽

Vol 87 (4) ◽

pp. 865-877

Author(s):

L. J. POWELL

Keyword(s):

Intersystem Crossing

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Spin-Forbidden Excitation Enables Infrared Photoredox Catalysis

10.26434/chemrxiv.12124215.v1 ◽

2020 ◽

Author(s):

Tomislav Rovis ◽

Benjamin D. Ravetz ◽

Nicholas E. S. Tay ◽

Candice Joe ◽

Melda Sezen-Edmonds ◽

...

Keyword(s):

Excited State ◽

Ground State ◽

Intersystem Crossing ◽

Photoredox Catalysis ◽

Infrared Irradiation ◽

Triplet Excitation ◽

New Family ◽

Ir Light

We describe a new family of catalysts that undergo direct ground state singlet to excited state triplet excitation with IR light, leading to photoredox catalysis without the energy waste associated with intersystem crossing. The finding allows a mole scale reaction in batch using infrared irradiation.

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Intersystem crossing processes in the 2CzPN emitter: a DFT/MRCI study including vibrational spin–orbit interactions

Physical Chemistry Chemical Physics ◽

10.1039/d0cp06011a ◽

2021 ◽

Vol 23 (5) ◽

pp. 3668-3678

Author(s):

Angela Rodriguez-Serrano ◽

Fabian Dinkelbach ◽

Christel M. Marian

Keyword(s):

Quantum Chemical Calculations ◽

Quantum Chemical ◽

Intersystem Crossing ◽

Spin Orbit ◽

Spin Orbit Interactions

Multireference quantum chemical calculations were performed in order to investigate the (reverse) intersystem crossing ((R)ISC) mechanisms of 4,5-di(9H-carbazol-9-yl)-phthalonitrile (2CzPN).

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Singlet Methylene Removal Rate Constants from the (0,1,0) Vibrational Level: Enhancement via Complex-Mediated Vibrational Relaxation

Zeitschrift für Physikalische Chemie ◽

10.1524/zpch.2001.215.6.795 ◽

2001 ◽

Vol 215 (6) ◽

Cited By ~ 1

Author(s):

M.A. Buntine ◽

G.J. Gutsche ◽

W.S. Staker ◽

M.W. Heaven ◽

K.D. King ◽

...

Keyword(s):

Vibrational Level ◽

Rate Constants ◽

Vibrational Relaxation ◽

Flash Photolysis ◽

Laser Flash Photolysis ◽

Removal Rate ◽

Laser Flash ◽

Laser Absorption ◽

Photolysis Laser ◽

Singlet Methylene

The technique of laser flash photolysis/laser absorption has been used to obtain absolute removal rate constants for singlet methylene,

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Electron transfer sensitized photolysis of 'onium salts

Canadian Journal of Chemistry ◽

10.1139/v88-055 ◽

1988 ◽

Vol 66 (2) ◽

pp. 319-324 ◽

Cited By ~ 55

Author(s):

R. J. DeVoe ◽

M. R. V. Sahyun ◽

Einhard Schmidt ◽

N. Serpone ◽

D. K. Sharma

Keyword(s):

Electron Transfer ◽

Flash Photolysis ◽

Laser Flash Photolysis ◽

Laser Flash ◽

Quantitative Model ◽

Intersystem Crossing ◽

Single Electron Transfer ◽

Onium Salts ◽

Encounter Complex ◽

Back Electron Transfer

We have studied the anthracene-sensitized photolyses of both diphenyliodonium and triphenylsulphonium salts in solution using both steady-state and laser flash photolysis techniques. Photoproducts, namely, phenylated anthracenes along with iodobenzene or diphenylsulphide, respectively, are obtained from both salts with quantum efficiencies of ca. 0.1 at 375 nm. We infer the intermediacy of diphenyliodo and triphenylsulphur radicals formed by single electron transfer from the singlet-excited anthracene. We have developed a quantitative model of this chemistry, and identify the principal sources of inefficiency as back electron transfer, which occurs at nearly the theoretically limiting rate, intersystem crossing from the initially formed sensitizer–'onium salt encounter complex, and in-cage radical recombination.

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