Results 121 to 130 of about 1,561 (166)

On the chemiluminescence emission of luminol: protic and aprotic solvents and encapsulation to improve the properties in aqueous solution

Physical Chemistry Chemical Physics, 2020
Luminol encapsulation increases the chemiluminescence wavelength and emission intensity for non-invasive cancer treatments.
Ana Borrego-Sánchez, Angelo Giussani, Mercedes Rubio, Daniel Roca-Sanjuán   +3 more
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Entering chloride kinetic isotope effects in protic and aprotic solvents

Journal of the American Chemical Society, 1976
Chlorine kinetic isotope effects for the reaction of ethylene oxide and chloride ion are normal (/sup 35/Cl//sup 37/Cl greater than unity) in protic solvents and in acetone and dimethylformamide (DMF) in the presence of 1 equiv of 2,6-lutidinium ion. In the presence of 0.1 equiv of this cation (and 0.9 of Li/sup +/) the isotope effect in DMF is inverse
C Gardner Swain
exaly   +2 more sources

Solvatochromic effects on the fluorescence and triplet–triplet absorption of phenosafranine in protic and aprotic solvents [PDF]

Journal of Photochemistry and Photobiology A: Chemistry, 2006
Photophysical and spectroscopic properties of phenosafranine were investigated in 21 solvents, including pure aprotic solvents and pure and binary protic solvent mixtures.
Carlos Previtali
exaly   +2 more sources

PGSE and NOE NMR Evidence for Higher Order Aggregation in Some Cationic Ruthenium Complexes in Both Protic and Aprotic Solvents

Inorganic Chemistry, 2003
PGSE and NOE NMR measurements were carried out for complexes [Ru(eta(6)-cymene)((2-R-C6H4)N=C(Me)-C(Me)=N(2-R-C6H4))Cl]X (X=BF4 or BPh4) in both protic and aprotic solvents with a relative permettivity (epsilon(r)) ranging from 2.27 (benzene-d(6)) to 46 ...
Daniele Zuccaccia, Alceo Macchioni, Eric Clot   +2 more
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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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
openaire   +1 more source

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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Counterion-dependent reorientation dynamics of an oxazine in polar protic and aprotic solvents

The Journal of Physical Chemistry, 1991
G J Blanchard
exaly   +2 more sources