External iodine atoms influence over the intersystem crossing rate of cyanine iodide ion pair in benzene solution

1991 ◽  
Vol 95 (5) ◽  
pp. 1903-1906 ◽  
Author(s):  
Bjorn Sauerwein ◽  
Gary B. Schuster
Keyword(s):  
Benzene Solution ◽  
Ion Pair ◽  
Intersystem Crossing ◽  
Iodide Ion

Construction of a [2]pseudorotaxane and a [3]pseudorotaxane based on perbromoethylated pillar[5]arene/pyridinium iodide ion-pair recognition

2019 ◽  
Vol 55 (31) ◽  
pp. 4527-4530 ◽  
Author(s):  
Li Shao ◽  
Bin Hua ◽  
Jiyong Liu ◽  
Feihe Huang
Keyword(s):  
Ion Pair ◽  
Iodide Ion

Herein we report the preparation of a [2]pseudorotaxane and a [3]pseudorotaxane based on perbromoethylated pillar[5]arene/pyridinium iodide ion-pair recognition.

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

Some physical properties of aqueous solutions of tetramethylammonium bromide and tetramethylammonium iodide

1965 ◽  
Vol 18 (8) ◽  
pp. 1161 ◽  
Author(s):  
BJ Levien
Keyword(s):  
Aqueous Solutions ◽  
Physical Properties ◽  
Activity Coefficients ◽  
Ion Association ◽  
Ion Pair ◽  
Standard Entropy ◽  
Solubility In Water ◽  
Iodide Ion ◽  
Tetramethylammonium Bromide

The activity coefficients up to saturation, some conductances and densities, and the solubility in water have been measured for tetramethylammonium bromide and tetramethylammonium iodide. Ion association exists and the ion-pair constants have been calculated by three methods. The standard entropy of the aqueous (CH3)4N+ ion has been calculated.

Mechanism of vibrational relaxation and intersystem crossing within excited ion-pair states of I2

1991 ◽  
Vol 103 (3) ◽  
pp. 417-428
Author(s):  
Ágúst Kvaran ◽  
Svava ósk Jónsdóttir ◽  
Thorgeir E. Thorgeirsson
Keyword(s):  
Vibrational Relaxation ◽  
Ion Pair ◽  
Intersystem Crossing
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