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Thermal Stability and Photochromic Properties of a Fluorinated Indolylfulgimide in a Protic and Aprotic Solvent [PDF]

Journal of Photochemistry and Photobiology A: Chemistry, 2008
The photochromic properties and thermal stability of a newly synthesized fluorinated N-ethoxycarbonylmethyl indolylfulgimide substituted on the imide nitrogen were examined in a protic and aprotic environment. The absorption spectra and extinction coefficients of the Z- and C-forms of the fluorinated indolylfulgimide (open and closed, respectively ...
Watson J Lees
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Phosphoryl Transfer From Phosphomonoesters in Aprotic and Protic Solvents

Pure and Applied Chemistry, 1980
Abstract
F Ramirez
exaly   +2 more sources

Rotational diffusion in aprotic and protic solvents

Chemical Physics, 1978
Abstract We present the orientational relaxation times in protic and aprotic solvents for rose bengal in its lowest excited singlet state. The method uses a mode locked dye laser for polarized excitation, and time correlated single photon counting for determination of the time resolved polarized fluorescence.
Kenneth G. Spears, Laurence E. Cramer
openaire   +1 more source

Selective Recognition of Alkyl Pyranosides in Protic and Aprotic Solvents

Journal of the American Chemical Society, 2008
The design and synthesis of receptors capable of selective, noncovalent recognition of carbohydrates continues to be a signature challenge in bioorganic chemistry. We report a new generation of tripodal receptors incorporating three pyridine (compound 2) or quinoline (compound 3) rings around a central cyclohexane core for use in molecular recognition ...
Prakash B, Palde, Peter C, Gareiss, Benjamin L, Miller   +2 more
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Photooxidation of Co-thiolato complexes in protic and aprotic solvents

Chemical Communications, 2006
Protic solvents decrease the susceptibility of the thiolate ligand in Co(III) thiolato complexes toward attack by singlet oxygen, but greatly increase the conversion of the peroxidic intermediate to the sulfenato product.
Billy, Hernandez, Yanju, Wang, Dong, Zhang, Matthias, Selke   +3 more
openaire   +2 more sources

New protic salts of aprotic polar solvents

Tetrahedron Letters, 2004
Abstract Aprotic polar solvents such as DMF, acetonitrile or DMSO can be protonated to form stable triflate salts when treated with triflic acid. The reaction of the same solvents with N , N -bis(trifluoromethanesulfonyl)imide led to the isolation of the corresponding N , N -bis(trifluoromethanesulfonyl)imide salts.
Isabelle Favier, Elisabet Duñach
openaire   +1 more source

Aminolysis of oxime ethers in protic and aprotic solvents

Journal of the Chemical Society, Perkin Transactions 2, 1989
Reactions of oxime ethers with the primary amines, n-propyl-, n-butyl-, n-pentyl-, and n-hexylamine in DMSO, DMF, and MeCN are strongly catalysed by general bases. The observed secondorder rate constants (kA) exhibit a curvilinear dependence on amine concentration leaving a positive intercept.
Ajay K. Jain, Anurag Kumar, Kula N. Sarma   +2 more
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Solvation of acetone in protic and aprotic solvents and binary solvent mixtures

Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 1985
The infrared spectra of dilute solutions of acetone in a range of protic and aprotic solvents have been measured in the C—O stretch region. Band maxima are shown to correlate linearly with 13C n.m.r. shifts for the carbonyl carbon and, after suitable corrections, with solvent acceptor numbers.
Martyn C. R. Symons, Graham Eaton
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Protic-Dipolar Aprotic Solvent Effects on Rates of Bimolecular Reactions

Chemical Reviews, 1969
exaly   +2 more sources

Isotropic magnetic shielding constants of retinal derivatives in aprotic and protic solvents

The Journal of Chemical Physics, 2013
We investigate the nuclear isotropic shielding constants σ(13C) and σ(17O) of isomers of retinoic acid and retinal in gas-phase and in chloroform, acetonitrile, methanol, and water solutions via Monte Carlo simulation and quantum mechanics calculations using the GIAO-B3LYP/6-311++G(2d,2p) approach.
G, Colherinhas, T L, Fonseca, M A, Castro, K, Coutinho, S, Canuto   +4 more
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