Results 11 to 20 of about 2,183 (174)

Prediction of Solvatochromic Polarity Parameters for Aqueous Mixed-Solvent Systems [PDF]

open access: yesApplied Sciences, 2020
Solvent polarity is important data being used in solvent selections for preliminary engineering design of chemical processes. In this work, a predictive model is proposed for estimating the solvatochromic polarity of electronic transition energy (ET) of ...
Alif Duereh   +2 more
doaj   +2 more sources

Effects of solvent and structure on the reactivity of 2-substituted nicotinic acids with diazodiphenylmethane in aprotic solvents [PDF]

open access: yesJournal of the Serbian Chemical Society, 2012
The rate constants for the reactions of diazodiphenylmethane (DDM) with 2-substituted nicotinic acids in nine aprotic solvents at 30°C were determined. The obtained second order rate constants in aprotic solvents, were correlated using the Kamlet-Taft
Drmanić Saša Ž.   +2 more
doaj   +1 more source

Solvatochromic parameters of deep eutectic solvents formed by ammonium-based salts and carboxylic acids. [PDF]

open access: yesFluid Phase Equilib, 2017
Deep eutectic solvents (DES) have been studied in a wide range of applications, and despite their potential as sustainable solvents, detailed knowledge on their solvatochromic parameters is still lacking. To overcome this problem, in this work, the Kamlet Taft (KT) solvatochromic parameters, namely the hydrogen-bond acidity, hydrogen-bond basicity and ...
Teles ARR   +5 more
europepmc   +4 more sources

Solvent effect on the absorption and emission spectra of carbon dots: evaluation of ground and excited state dipole moment

open access: yesBMC Chemistry, 2021
Background Carbon dots (C-dots) are photoluminescent nanoparticles with less than 10 nm in size. Today, many studies are performed to exploit the photoluminescence (PL) property of carbon dots, and our focus in this study is to estimate the dipole moment
Parisa Mohammad-Jafarieh   +4 more
doaj   +1 more source

New QSAR and Solvatochromic Estimation of Molecular Parameters of Chlortetracycline

open access: yesRevista de Chimie, 2020
The present paper is focused on determination of the main parameters of Chlortetracycline. Chlortetracycline belongs to one of the most used family of antibiotics worldwide, Tetracyclines. Because of the large spectrum of infections which can be treated with this category of antibiotics there are attempts to find new derivatives from this class.
Antonina Gritco-Todirascu   +4 more
openaire   +1 more source

Investigations of the reactivity of pyridine carboxylic acids with diazodiphenylmethane in protic and aprotic solvents, Part I: Pyridine mono-carboxylic acids [PDF]

open access: yesJournal of the Serbian Chemical Society, 2005
Rate constants for the reaction of diazodiphenylmethane with isomeric pyridine carboxylic acids were determined in chosen protic and aprotic solvents at 30 °C, using the well known UV spectrophotometric method.
Marinković Aleksandar D.   +3 more
doaj   +1 more source

Dinuclear Copper(II) Complex of Containing N,N-diisopropyl,N'-3-propylamide-ethylenediamine, and Dihydroxo Bridge; Solvatochromic and Thermochromic [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2022
The synthesis and characterization of a dinuclear [LCu(m-OH)2CuL](ClO4)2, complex with a tridentate N,N-diisopropyl,N'-3-propylamide-ethylenediamine hemilabile ligand (abbreviated L) is reported.
Asieh Heidarain, Hamid Golchoubian
doaj   +1 more source

Solvatochromism studies on UV spectra of 4,5-disubstituted-1,2,4-triazoline-3-thiones

open access: yesMacedonian Journal of Chemistry and Chemical Engineering, 2012
The influence of a series of organic solvents on the UV spectra of investigated 1,2,4-triazoles, was studied by implementing solvatochromic theory.
Vesna B. Dimova   +1 more
doaj   +1 more source

Calculation of the stability constants for the complex formation of dioxovanadium (V) with methyliminodiacetic acid in various H2O + CH3OH solutions using kamlet-abboud-taft equation [PDF]

open access: yesJournal of the Serbian Chemical Society, 2013
The stability constants for the complex formation of VO2+ cation with methyliminodiacetic acid (MIDA) have been determined in this research for various volume fractions of methanol (0-45% v/v) at T = 298 K, I = 0.1 mol dm-3 of sodium perchlorate.
Majlesi Kavosh   +4 more
doaj   +1 more source

Investigations of the reactivity of pyridine carboxylic acids with diazodiphenylmethane in protic and aprotic solvents. Part II. Pyridine mono-carboxylic acid N-oxides [PDF]

open access: yesJournal of the Serbian Chemical Society, 2006
The rate constants for the reaction of three isomeric pyridine mono-carbocylic acid N-oxides with diazodiphenylmethane were determined at 30 ºC in thirty two protic and aprotic solvents by the well known UV spectrophotometric method.
MILICA MISIC-VUKOVIC   +3 more
doaj   +3 more sources

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