Regioselective Bond Cleavage in the Dissociative Electron Transfer to Benzyl Thiocyanates:  The Role of Radical/Ion Pair Formation

2006 ◽  
Vol 128 (20) ◽  
pp. 6595-6604 ◽  
Author(s):  
Emad M. Hamed ◽  
Hanh Doai ◽  
Christopher K. McLaughlin ◽  
Abdelaziz Houmam
Keyword(s):  
Electron Transfer ◽  
Bond Cleavage ◽  
Ion Pair ◽  
Pair Formation ◽  
Dissociative Electron Transfer ◽  
Ion Pair Formation

scholarly journals Rydberg atom scattering in K(12p)-CH3NO2 collisions: role of transient ion pair formation

2017 ◽  
Vol 875 ◽  
pp. 082002
Author(s):  
M. Kelley ◽  
S. Buathong ◽  
F. B. Dunning
Keyword(s):  
Rydberg Atom ◽  
Ion Pair ◽  
Pair Formation ◽  
Ion Pair Formation ◽  
Atom Scattering

Mechanistic Studies on Fast Ligand Substitution Reactions of Pt(II) in Different Ionic Liquids: Role of Solvent Polarity and Ion-Pair Formation

2008 ◽  
Vol 47 (16) ◽  
pp. 7121-7132 ◽  
Author(s):  
Svetlana Begel ◽  
Peter Illner ◽  
Simon Kern ◽  
Ralph Puchta ◽  
Rudi van Eldik
Keyword(s):  
Ionic Liquids ◽  
Solvent Polarity ◽  
Ligand Substitution ◽  
Ion Pair ◽  
Pair Formation ◽  
Mechanistic Studies ◽  
Substitution Reactions ◽  
Ion Pair Formation ◽  
Role Of Solvent

scholarly journals Ion-Pair Formation of [CoIII(pn)2(Cl)(L)2+····· I−] by Aqueous-Organic Solvent Medium Enhanced Photoreduction: A Perspective Regression Analysis

2020 ◽  
Vol 32 (6) ◽  
pp. 1379-1383
Author(s):  
L. Devaraj Stephen ◽  
S.G. Gunasekaran ◽  
M. Soundarrajan
Keyword(s):  
Charge Transfer ◽  
Organic Solvent ◽  
High Performance ◽  
Ion Pair ◽  
Pair Formation ◽  
The Novel ◽  
Solvent Medium ◽  
Ion Pair Formation ◽  
Iodide Ion

Reduction of CoIII centre in CoIII(pn)2(Cl)(L)2+ with reference to solvent medium and structure of the complex via ion pair charge transfer (IPCT) paves way for the novel reaction mechanism route. In this work, we prepared, characterized and photoinduced the complexes CoIII(pn)2(Cl)(L)2+ (where L = RC6H4NH2, R = m-OMe, p-F and H) in the presence of iodide ion. Quantum yield for 254 nm excitation of CoIII(pn)2(Cl)(L)2+(where L = RC6H4NH2, R = m-OMe, p-F and H) in water-1,4-dioxane mixtures (Diox = 0, 5, 10, 15, 20, 25, and 30% (v/v)) were also derived for all the complexes in presence of added iodide ion, in which CoIII was reduced via [CoIII(pn)2(Cl)(L)2+….. I-] ion-pair formation. The photoinduced state is ion-pair charge transfer transition state and the quantum efficiency is solvent reliant and they are non-reactive. That is, change in ΦCo(II) is dependable with observed increase in xDiox of the mixed solvent medium. Correlation analysis using empirical parameters εr, Y, ET N and DNN provides a model to understand the solvent medium participation and interaction. This work gains an insight into the role of aqueous-organic solvent medium in CoIII(pn)2(Cl)(L)2+ photoreduction, which may be of great significance in developing novel approaches in the field of high performance catalysis

Elektronentransfer und Ionenpaar-Bildung, 48 [1] Titrationen von Tetraphenyl-p-benzochinon mit Natrium- und Kaliummetall in aprotischen Lösungen / Electron Transfer and Ion Pair Formation, 48 [ 1 ] Titrations of Tetraphenyl-p-benzoquinone with Sodium and Potassium Metals in Aprotic Solutions

1996 ◽  
Vol 51 (9) ◽  
pp. 1222-1228 ◽  
Author(s):  
Hans Bock ◽  
Markus Kleine
Keyword(s):  
Electron Transfer ◽  
Radical Anion ◽  
Esr Spectra ◽  
Electron Transfer Reaction ◽  
Ion Pair ◽  
Pair Formation ◽  
Reaction Products ◽  
Ion Pair Formation ◽  
Electron Reduction ◽  
Sodium And Potassium

UV/VIS and ESR spectra of electron transfer reaction products in aprotic (cH⊕ < 0,1 ppm) solution can be measured in an especially designed and sealed glass apparatus and provide information on unknown facets of the microscopic pathway through the network of interdependent equilibria. For tetraphenyl-p-benzoquinone in tetrahydrofuran, single-electron reduction by a sodium metal mirror produces a red solution and, unexpectedly, after addition of 2.2.2. cryptand, contact with a potassium metal mirror generates a green (!) one. For both, ESR/ENDOR spectra prove the presence of tetraphenyl-p-benzoquinone radical anion. UV/VIS measurements provide the clue: In the equilibrium revealed by repetetive spectra recording, M·⊖solv + Me⊕solv ⇄ [M·⊖···Me⊖]solv, the radical anion is green (vm = 16900 cm-1) and the contact ion pair red (vm=18900 cm-1 ). On ion pair formation, therefore, the excitation energy of the radical anion increases by 0.25 eV.

Exclusive triplet electron transfer leading to long-lived radical ion-pair formation in an electron rich platinum porphyrin covalently linked to fullerene dyad

2020 ◽  
Vol 56 (45) ◽  
pp. 6058-6061 ◽  
Author(s):  
Dili R. Subedi ◽  
Habtom B. Gobeze ◽  
Yuri E. Kandrashkin ◽  
Prashanth K. Poddutoori ◽  
Art van der Est ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Excited State ◽  
Ion Pair ◽  
Pair Formation ◽  
Triplet Excited State ◽  
Ion Pair Formation ◽  
Donor Acceptor ◽  
Platinum Porphyrin ◽  
Covalently Linked ◽  
Pair Energy

Radical ion-pair energy as high as 1.48 eV with lifetime as much as ∼1 μs, exclusively from the triplet excited state of a photosensitizer, is established in a novel donor–acceptor conjugate.

scholarly journals Very strong Rydberg atom scattering in K(12p)–CH3NO2collisions: Role of transient ion pair formation

2017 ◽  
Vol 146 (18) ◽  
pp. 184307 ◽  
Author(s):  
M. Kelley ◽  
S. Buathong ◽  
F. B. Dunning
Keyword(s):  
Rydberg Atom ◽  
Ion Pair ◽  
Pair Formation ◽  
Ion Pair Formation ◽  
Atom Scattering

scholarly journals Ion-Pair Formation in Neutral Potassium-Neutral Pyrimidine Collisions: Electron Transfer Experiments

2019 ◽  
Vol 7 ◽  
Author(s):  
Mónica Mendes ◽  
Beatriz Pamplona ◽  
Sarvesh Kumar ◽  
Filipe Ferreira da Silva ◽  
Antonio Aguilar ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Ion Pair ◽  
Pair Formation ◽  
Ion Pair Formation

The role of Rydberg states in photoionization of NO2and (NO+, O−) ion pair formation induced by one VUV photon

2013 ◽  
Vol 139 (4) ◽  
pp. 044311 ◽  
Author(s):  
S. Marggi Poullain ◽  
K. Veyrinas ◽  
P. Billaud ◽  
M. Lebech ◽  
Y. J. Picard ◽  
...  
Keyword(s):  
Rydberg States ◽  
Ion Pair ◽  
Pair Formation ◽  
Ion Pair Formation
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