Results 51 to 60 of about 4,840 (219)

PGSE and NOE NMR evidence for higher order aggregation in some cationic ruthenium complexes in both protic and aprotic solvents

, 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 ...
Sabatini, Stefano, ZUCCACCIA, Daniele, G. Cardaci, G. Bellachioma, Macchioni, Alceo, Bellachioma, Gianfranco, Cardaci, Giuseppe, E. Clot, Clot, Eric, S. Sabatini, A. Macchioni   +10 more
core   +1 more source

The electronic origin of the ground state spectral features and excited state deactivation in cycloalkanones: the role of intermolecular H-bonding in neat and binary mixtures of solvents

, 2022
In this study, a D–A cycloalkanone (K1) has been investigated by steady state absorption and fluorescence in neat solvents and in three binary mixtures of nonpolar aprotic/polar protic, polar aprotic/polar protic, and polar protic/polar protic solvents ...
Ibrahim Ahmed Z. Al-Ansari (4846957)
core   +1 more source

Aggregation-induced emission effect on turn-off fluorescent switching of a photochromic diarylethene

Beilstein Journal of Organic Chemistry, 2019
Background: Diarylethenes are well-known photochromic compounds, which undergo cyclization and cycloreversion reactions between open- and closed-ring isomers.
Luna Kono, Yuma Nakagawa, Ayako Fujimoto, Ryo Nishimura, Yohei Hattori, Toshiki Mutai, Nobuhiro Yasuda, Kenichi Koizumi, Satoshi Yokojima, Shinichiro Nakamura, Kingo Uchida   +10 more
doaj   +1 more source

Amide Methylation Empowers Concentrated Hydrogel Electrolytes for Wide‐Temperature Flexible Aqueous Sodium‐Ion Batteries

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
An aprotic poly(N,N‐dimethylacrylamide) matrix provides free C=O sites for strong ion solvation, establishing a stable and homogeneous gel phase. This unique polymer network effectively reduces H2O activity, enabling highly concentrated gel electrolytes for high‐voltage, wide‐temperature, and flexible aqueous sodium‐ion batteries.
Shibo Chai, Xianshengwei Zhang, Wenpin Li, Minghao Xu, Shengjun Zhai, Peng Gong, Yihang Zhang, Jiale Xia, Yuanyuan Li, Jinping Liu   +9 more
wiley   +1 more source

Picosecond Transient Grating Study of The Reorientation Dynamics of Nile Red in different classes of solvents

, 1993
The rotational dynamics of nile red has been studied in polar protic, polar aprotic and non-polar solvents. In the non-polar and the aprotic solvents, with the exception of long alkanenitriles, the rotation dynamics is consistent with the prediction of ...
Vauthey, Eric, Eic Vauthey
core   +1 more source

Fluorescence and photostability studies of anthracene-9-carboxylic acid in different media

International Journal of Photoenergy, 2000
Electronic absorption and fluorescence spectra of anthracene-9-carboxylic acid (ANCA) were studied in different homogeneous solvents, binary protic/aprotic solvent mixtures and in heterogeneous solutions of the cationic cetyltrimethyl ammonium bromide ...
M. S. A. Abdel-Mottaleb, H. R. Galal, A. F. M. Dessouky, M. El-Naggar, D. Mekkawi, S. S. Ali, G. M. Attya   +6 more
doaj   +1 more source

Tandem Synthesis and Photophysical Behavior of Pyrazolo[3,4‐h][1,6]naphthyridines: A Theoretical–Experimental Approach

European Journal of Organic Chemistry, EarlyView.
A tandem reaction of 5‐aroylpyrazolo[3,4‐b]pyridines with malononitrile and methanol to access pyrazolo[3,4‐h][1,6]naphthyridines was achieved in 60%–66% yield under microwave conditions. The tricyclic fluorophoric core bears groups of different stereoelectronic nature (i.e., alkyl, aryl, MeO, and CN), and thus their optoelectronic activity shows ...
Carlos Cifuentes, Alexander Ladino‐Bejarano, Cristian Rivera‐Moyano, Jaime Portilla   +3 more
wiley   +1 more source

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

, 2016
PGSE and NOE NMR measurements were carried out for complexes [Ru(η6-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 (εr) ranging from 2.27 (benzene-d6) to 46.45 (dimethyl
Gianfranco Bellachioma (2239336), Stefano Sabatini (1316760), Eric Clot (1574785), Giuseppe Cardaci (2942217), Alceo Macchioni (1348728), Daniele Zuccaccia (1402813)   +5 more
core   +1 more source

Photocatalyst‐Free Trifluoromethylation of Indolizines Through an Electron Donor–Acceptor Complex

European Journal of Organic Chemistry, EarlyView.
A new photocatalyst‐free pathway for the direct C‐3‐trifluoromethylation of indolizines and imidazo[1,2‐a]pyridines through an electron donor–acceptor (EDA) complex is studied. This regioselective reaction supports a wide range of functional groups, indicating good versatility and robustness.
Corinne Coutant, Konan Jean‐Fabrice Koffi, Lielou Lantigner, Pascal Retailleau, Christian Herrero, Christine Tran, Abdallah Hamze, Sandrine Piguel   +7 more
wiley   +1 more source

Structure Determination Using the Method of Continuous Variation: Lithium Phenolates Solvated by Protic and Dipolar Aprotic Ligands

, 2016
The method of continuous variation (MCV) was used in conjunction with 6Li NMR spectroscopy to characterize four lithium phenolates solvated by a range of solvents, including N,N,N′,N′-tetramethylethylenediamine, Et2O, pyridine, protic amines, alcohols ...
David B. Collum (1308378), Laura L. Tomasevich (1326027)   +1 more
core   +1 more source