The electron affinity of tetracyanoethylene and other organic electron acceptors

1976 ◽  
Vol 29 (9) ◽  
pp. 1919 ◽  
Author(s):  
LE Lyons ◽  
LD Palmer
Keyword(s):  
Electron Affinity ◽  
Organic Molecules ◽  
Threshold Energy ◽  
Negative Ions ◽  
Surface Ionization ◽  
Electron Affinities ◽  
Strong Electron ◽  
A Value ◽  
Organic Electron ◽  
Relative Electron

Information on the molecular structure of tetracyanoethylene and its mononegative ion is used to derive the electron affinity of tetracyanoethylene from the experimentally determined threshold energy for photodetachment of electrons from the negative ions. The resultant electron affinity of 2.3(� 0.3) eV is 0.6(� 0.4) eV less than a value derived by the magnetron surface ionization technique. Relative electron affinities for the strong electron acceptor organic molecules, which are known from charge-transfer spectra, are placed on an absolute scale using the photodetachment result for tetracyanoethylene.

The attachment of slow electrons in carbon dioxide

1960 ◽  
Vol 254 (1277) ◽  
pp. 229-241 ◽  
Keyword(s):  
Carbon Dioxide ◽  
Kinetic Energy ◽  
Cross Section ◽  
Electron Affinity ◽  
Negative Ions ◽  
Negative Ion ◽  
Initial Kinetic Energy ◽  
A Value ◽  
Normal Electron ◽  
Peak Cross Section

The formation of positive and negative ions in carbon dioxide has been investigated by means of a Lozier apparatus. The negative ion process was interpreted as CO 2 + e → CO( X 1 Σ + ) + O - (2 P 0 ). The (peak) cross-section for electron attachm ent was found to be 5·07 ± 0·5 x 10 -19 cm 2 at 7·8 eV, and the ionization cross-section reached a m axim um value of 6·80 x 10 -16 cm 2 at 85 eV. Measurements of the electron affinity of oxygen by the normal electron impact method yielded a value of 1·6 ± 0·2 eV for O - ions formed with an initial kinetic energy of 1·8 eV. It is shown that this apparent value of electron affinity must be corrected, because of the initial kinetic energy of the ions and the energy spread of the source electrons, and then yields a value of 1·2 ± 0·3 eV.

Reactions of pyrazine radical anions in solution. II. Oxidation reduction equilibrium between radical anions of pyrazine and anthracene

1972 ◽  
Vol 25 (12) ◽  
pp. 2597 ◽  
Author(s):  
RS Hay ◽  
PJ Pomery
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
Electron Affinity ◽  
Radical Anions ◽  
Free Energies ◽  
Spectrophotometric Methods ◽  
A Value ◽  
Oxidation Reduction ◽  
Spin Resonance ◽  
Relative Electron

The relative electron affinity of pyrazine (pz) and anthracene (A) has been determined in 1,2-dimethoxyethane (dme) solution. Electron spin resonance and spectrophotometric methods were employed to study the equilibrium: (pz-,K+) + A ←→ pz + (A-,K+) The equilibrium constant for this reaction has been calculated, after consideration of other reactions of the pyrazine radical anions in the solution, and modified for the case of the equilibrium reaction of the unassociated radical anions. The resultant value has been used to calculate the relative solution electron affinity of pyrazine, which was determined to be of the order of 0.09 eV smaller than that of anthracene in dme. The free energies of solvation of the radical anions of pyrazine and anthracene have been estimated and a value of the gaseous electron affinity of pyrazine calculated.

Strong electron affinity PDI supramolecules form anion radical for organic pollutants degradation via directly electrophilic attack

2021 ◽  
Author(s):  
Xiaojuan Bai ◽  
Cong Wang ◽  
Xuyu Wang ◽  
Tianqi Jia ◽  
Boxuan Sun ◽  
...  
Keyword(s):  
Organic Pollutants ◽  
Electron Affinity ◽  
Anion Radical ◽  
Environmental Pollutants ◽  
Personal Care Products ◽  
Personal Care ◽  
Electrophilic Attack ◽  
Strong Electron

Pharmaceutical and personal care products (PPCPs) are the most common hazardous environmental pollutants. PDIs anion radical is the promising photocatalyst to transform PPCPs into non-toxic CO2 and H2O for clean...

The Electron Affinities of the Alkyldithio Radicals and their Anions

2012 ◽  
Vol 512-515 ◽  
pp. 2059-2063 ◽  
Author(s):  
Hui Yi Pei ◽  
Ai Fang Gao
Keyword(s):  
Electron Affinity ◽  
Density Functional ◽  
Basis Set ◽  
Electron Affinities ◽  
Hartree Fock ◽  
Functional Methods ◽  
Different Types ◽  
Vertical Detachment Energy ◽  
Vertical Electron Affinity ◽  
P Type

The electron affinities of the CnH2n+1SS/CnH2n+1SS- (n=1-5) species have been determined using four different density functional or hybrid Hartree-Fock density functional methods. The basis set used in this work is of double- plus polarization quality with additional diffuse s- and p-type functions, denoted DZP++. Three different types of the neutral-anion energy separations reported in this work are the adiabatic electron affinity (EAad), the vertical electron affinity (EAvert), and the vertical detachment energy (VDE). The most reliable adiabatic electron affinities, obtained at the DZP++ BP86 level of theory, are 1.794 eV (for CH3SS), 1.777 eV (for C2H5SS), 1.778 eV (a) and 1.809 eV (b) for the two isomers of C3H7SS, 1.782 eV (a), 1.825 eV (b) and 1.778 eV (c) for the three isomers of C4H9SS, and 1.784 eV (a), 1.875 eV (b), 1.805 eV (c) and 1.835 eV (d) for the three isomers of C5H11SS, respectively.

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