Acidity of hydrocarbons. XLIX. Equilibrium ion pair acidities of fluorinated benzenes for cesium salts in cyclohexylamine. Extrapolation of pK of benzene

1972 ◽  
Vol 94 (22) ◽  
pp. 7936-7937 ◽  
Author(s):  
A. Streitwieser ◽  
P. J. Scannon ◽  
H. M. Niemeyer
Keyword(s):  
Ion Pair ◽  
Cesium Salts

scholarly journals Ion pair-induced conformational motion in calix[4]arene-strapped calix[4]pyrroles

2015 ◽  
Vol 6 (2) ◽  
pp. 1404-1413 ◽  
Author(s):  
Sung Kuk Kim ◽  
Vincent M. Lynch ◽  
Benjamin P. Hay ◽  
Jong Seung Kim ◽  
Jonathan L. Sessler
Keyword(s):  
Ion Pair ◽  
Binding Modes ◽  
Conformational Motion ◽  
Cesium Salts

Cone- and conformationally mobile calix[4]arene-strapped calix[4]pyrroles bind cesium salts via various different binding modes.

3-(Dicyanomethylidene)indan-1-one-Functionalized Calix[4]arene–Calix[4]pyrrole Hybrid: An Ion-Pair Sensor for Cesium Salts

2016 ◽  
Vol 18 (17) ◽  
pp. 4396-4399 ◽  
Author(s):  
Yerim Yeon ◽  
Soojung Leem ◽  
Corin Wagen ◽  
Vincent M. Lynch ◽  
Sung Kuk Kim ◽  
...  
Keyword(s):  
Ion Pair ◽  
Cesium Salts

Ion Pair Properties of Lithium and Cesium Salts of Carbazole1

1998 ◽  
Vol 120 (8) ◽  
pp. 1718-1723 ◽  
Author(s):  
Alessandro Abbotto ◽  
Andrew Streitwieser ◽  
Manolis Stratakis ◽  
James A. Krom
Keyword(s):  
Ion Pair ◽  
Cesium Salts

Elucidating the structures and cooperative binding mechanism of cesium salts to the multitopic ion-pair receptor through density functional theory calculations

2015 ◽  
Vol 44 (35) ◽  
pp. 15450-15462 ◽  
Author(s):  
Biswajit Sadhu ◽  
Mahesh Sundararajan ◽  
Gunasekaran Velmurugan ◽  
Ponnambalam Venuvanalingam
Keyword(s):  
Quantum Chemical ◽  
Density Functional ◽  
Density Functional Theory Calculations ◽  
Ion Pair ◽  
Cooperative Binding ◽  
Binding Mechanism ◽  
Functional Theory ◽  
Chemical Studies ◽  
Quantum Chemical Studies ◽  
Cesium Salts

Quantum chemical studies predict the binding of Cesium salts to multitopic ion-pair receptor is through cooperative mechanism.

National primary standard of air kerma, air kerma rate, exposure, exposure rate and energy flux for X-rays and gamma radiation GET 8-2019

2020 ◽  
pp. 8-12
Author(s):  
Alexandr V. Oborin ◽  
Anna Y. Villevalde ◽  
Sergey G. Trofimchuk
Keyword(s):  
Gamma Radiation ◽  
Energy Flux ◽  
Primary Standard ◽  
Average Energy ◽  
Ion Pair ◽  
X Rays ◽  
Exposure Rate ◽  
Ionization Chambers ◽  
Air Kerma ◽  
Air Kerma Rate

The results of development of the national primary standard of air kerma, air kerma rate, exposure, exposure rate and energy flux for X-rays and gamma radiation GET 8-2011 in 2019 are presented according to the recommendations of the ICRU Report No. 90 “Key Data for Ionizing-Radiation Dosimetry: Measurement Standards and Applications”. The following changes are made to the equations for the units determination with the standard: in the field of X-rays, new correction coefficients of the free-air ionization chambers are introduced and the relative standard uncertainty of the average energy to create an ion pair in air is changed; in the field of gamma radiation, the product of the average energy to create an ion pair in air and the electron stopping-power graphite to air ratio for the cavity ionization chambers is changed. More accurate values of the units reproduced by GET 8-2019 are obtained and new metrological characteristics of the standard are stated.

Extractive Spectrophotometric Method for the Determination of Glibenclamide by Ion-Pair Complex in Pure Form and Pharmaceutical Formulation

2019 ◽  
Vol 9 (o3) ◽  
Author(s):  
RUAA MUAYAD MAHMOOD ◽  
HAMSA MUNAM YASSEN ◽  
SAMAR , NAJWA ISSAC ABDULLA AHMED DARWEESH ◽  
NAJWA ISSAC ABDULLA
Keyword(s):  
Spectrophotometric Method ◽  
Molar Absorptivity ◽  
Ion Pair ◽  
Pharmaceutical Formulation ◽  
Ratio Method ◽  
Colored Complex ◽  
Colored Product ◽  
Method Of Continuous Variation ◽  
Job's Method

Simple, rapid and sensitive extractive spectrophotometric method is presented for the determination of glibenclamide (Glb) based on the formation of ion-pair complex between the Glb and anionic dye, methyl orange (MO) at pH 4. The yellow colored complex formed was quantitatively extracted into dichloromethane and measured at 426 nm. The colored product obeyed Beer’s law in the concentration range of (0.5-40) μg.ml-1. The value of molar absorptivity obtained from Beer’s data was found to be 31122 L.mol-1.cm-1, Sandell’s sensitivity value was calculated to be 0.0159 μg.cm-2, while the limits of detection (LOD) and quantification (LOQ) were found to be 0.1086 and 0.3292 μg.ml-1, respectively. The stoichiometry of the complex created between the Glb and MO was 1:1 as determined via Job’s method of continuous variation and mole ratio method. The method was successfully applied for the analysis of pharmaceutical formulation.

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