Picosecond decay dynamics of the trans-stilbene-olefin contact ion pair: electron-transfer vs. ion-pair separation

1985 ◽  
Vol 107 (23) ◽  
pp. 6459-6463 ◽  
Author(s):  
Joshua L. Goodman ◽  
Kevin S. Peters
Keyword(s):  
Electron Transfer ◽  
Ion Pair ◽  
Contact Ion Pair ◽  
Trans Stilbene ◽  
Pair Separation ◽  
Ion Pair Separation

scholarly journals The Ion Pair Thermal Model of MALDI MS

2021 ◽  
Author(s):  
Shiyue Fang
Keyword(s):  
Gas Phase ◽  
Thermal Model ◽  
Ion Pair ◽  
Pair Formation ◽  
Maldi Ms ◽  
Ion Extraction ◽  
Free Ion ◽  
Pair Separation ◽  
Ion Yields ◽  
Ion Pair Separation

The ion pair thermal model for MALDI MS is described. Key elements of the model include thermal desorption and ionization, strong tendency to neutralization via ion pair formation and proton transfer in the gas phase, thermal equilibrium, overall charge neutral plume, and thermal energy assisted free ion generation via ion pair separation by ion extraction potential. The quantities of ions in the solid sample and in the gaseous plume are estimated. Ion yields of different classes of molecules including peptides, nucleic acids, permanent salts and neutral molecules are estimated at the macroscale and single ion pair levels. The estimated ion yields are close to experimentally observed values under certain assumptions. Explanations of several observations in MALDI MS such as mostly single-charged peaks, improvement of spectra by ammonium cation, and ion suppression are provided. We expect that the model can give insights for the design of new conditions and systems for improving the sensitivity and resolution of MALDI MS and improving its capability and reliability to analyze large biomolecules.

Ion-pair separation via selective inclusion/segregation processes

CrystEngComm ◽  
2009 ◽  
Vol 11 (7) ◽  
pp. 1204 ◽  
Author(s):  
Giuseppe Gattuso ◽  
Anna Notti ◽  
Sebastiano Pappalardo ◽  
Melchiorre F. Parisi ◽  
Tullio Pilati ◽  
...  
Keyword(s):  
Ion Pair ◽  
Pair Separation ◽  
Ion Pair Separation

Formation of contact ion-pair and dissociated ion-radicals by electron transfer from excited amine to oxygen molecules

1972 ◽  
Vol 15 (2) ◽  
pp. 223-225 ◽  
Author(s):  
Yoshio Taniguchi ◽  
Akira Miyoshi ◽  
Noboru Mataga ◽  
Haruo Shizuka ◽  
Toshifumi Morita
Keyword(s):  
Electron Transfer ◽  
Ion Pair ◽  
Contact Ion Pair

Elektronentransfer und Ionenpaar-Bildung, 8 [1] 107,109Ag ENDOR-Kopplungen und Redox-Verhalten des Radikal-Kontaktionenpaares aus Bis(triphenyIphosphino)silber(I)-Kation und 3,5-Di(tert-butyl)-o-benzosemichinon-Anion / Electron Transfer and Ion Pairing, 8 [1] 107'109Ag ENDOR Couplings and Redox Behaviour of the Radical Contact Ion Pair from Bis(triphenylphosphino)silver(I) Cation and 3,5-Di(tert-butyl)-o-benzosemiquinone Anion

1988 ◽  
Vol 43 (10) ◽  
pp. 1247-1252 ◽  
Author(s):  
H Bock ◽  
B Hierholzer ◽  
D Jaculi
Keyword(s):  
Electron Transfer ◽  
Cyclic Voltammetry ◽  
Ion Pairing ◽  
Ion Pair ◽  
Redox Behaviour ◽  
Tert Butyl ◽  
Silver Salts ◽  
Contact Ion Pair ◽  
First Time

For the first time, 107,109Ag ENDOR measurements in solution are reported. In addition, the formation of the known paramagnetic contact ion pair [Ag⊕(PR3)2(R2H2C6O2·⊖] on reduction of 3,5-di(tert-butyl)-o-benzoquinone in THF solution containing soluble silver salts and triphenylphosphine is studied by cyclic voltammetry.

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