Results 31 to 40 of about 10,994 (228)

Probing hydrogen-bonding in binary liquid mixtures with terahertz time-domain spectroscopy: a comparison of Debye and absorption analysis. [PDF]

, 2015
Terahertz time-domain spectroscopy is used to explore hydrogen bonding structure and dynamics in binary liquid mixtures, spanning a range of protic-protic, protic-aprotic and aprotic-aprotic systems.
Bräuer, Pierre, D'Agostino, Carmine, Gladden, Lynn F, Li, Ruoyu, Tan, Nicholas Y, Zeitler, J Axel   +5 more
core   +2 more sources

Spectroscopic behavior of pyrrolanthrone and its derivative in aprotic and protic solvents [PDF]

International Conference on Atomic and Molecular Pulsed Lasers XIII, 2018
Recently synthesized pyrrolanthrone, naphtho[1,2,3-cd]indole-6(2H)-one (PyAn), and its water-soluble derivative, 3(naphtho[1,2,3-cd]indole-6(2H)-one-2-yl) sodium propylsulfonate, are very promising for anticancer therapy due to both the fluorescent and cytotoxic properties.
Merezhko, A. G., Gerasimova, M. A., Gornostaev, L. M., Tropina, D. A., Slyusareva, E. A.   +4 more
openaire   +2 more sources

Greener Method to Obtain a Key Intermediate of Vitamin E over Cu-ZSM-5 [PDF]

, 2014
The catalytic oxidation of 2,3,5-trimethylphenol was performed over transition metals modified ZSM-5 zeolites employing hydrogen peroxide as oxidant under mild reaction conditions.
Alcón M. J., Bonrath W., Bonrath W., Borade R., Busca G., Caudo S., Choudhary V. R., Clara Saux, Coman S. M., Corma A., Emeis C. A., Gil A., Handique J. G., Hulea V., Inchaurrondo N. S., Kato C. N., Kholdeeva O., Kholdeeva O. A., Li P., Li Y., Liliana B. Pierella, María Soledad Renzini, Palacio M., Pierella L., Pérez-Ramírez J., Rhee K., Rosenau T., Sashkina K. A., Saux C., Silvina Gomez, Sotelo J. L., Timofeeva M. N., Trukhan N., Trukhan N. N., Tsai C. L., Wang F., Wang Y., Zhou S., Zrncevic S., Čejka J.   +39 more
core   +1 more source

The Far Side of Carboranes: Anticancer Active Monocations and Ambiently Stable Dications

Angewandte Chemie, EarlyView.
This work describes the synthesis of bench‐stable dicationic carboranes. Their enhanced electrophilicity is documented by opening the clusters with weak nucleophiles or dihydrogen. The surprising stability of positively charged carboranes in water enabled a study of their in vitro antiproliferative activity, which surpassed the effects of doxorubicin ...
Vlastimil Němec, Josef Holub, Maksim A. Samsonov, Zdeňka Růžičková, Josef Cvačka, Ján Vančo, Zdeněk Trávníček, Jan Belza, Zdeněk Dvořák, Jan Vrána, Aleš Růžička   +10 more
wiley   +2 more sources

Effect of Solvent and Catalyst Types on Stability and Properties of Zinc Phthalocyanine in the Organic–Inorganic Hybrid Materials

Crystals, 2021
Hybrid materials, i.e., the organically modified silicates (ORMOSIL) based on zincphthalocyanine (ZnPc) and silica glass matrix were synthesized by the sol-gel method using protic solvents (methanol, ethanol, isopropanol, butanol) and aprotic solvent (N ...
Barbara Popanda, Marcin Środa, Katarzyna Cholewa-Kowalska   +2 more
doaj   +1 more source

Comprehensive Modeling of Acetone Clusters: QTAIM Analysis and QCE Study. [PDF]

J Comput Chem
A multiscale DFT‐QTAIM‐QCE approach links acetone cluster interactions to liquid‐phase behavior. Macroscopic thermodynamic and IR properties emerge from a dynamic equilibrium of small clusters. ABSTRACT In molecular research, comprehending the microscopic source of the macroscopic characteristics of polar aprotic solvents continues to be a significant ...
Baikété J, Malloum A, Conradie J.
europepmc   +2 more sources

Synthesis of pyrrolizines by intramolecular capture of 1,4-dipolar intermediates in reactions of enamines with dimethyl acetylenedicarboxylate [PDF]

, 1981
Solvent polarity and reaction temperature strongly influence the reactions of dimethyl acetylenedicar-boxylate (DMAD) with 1-pyrrolidinyl enamines of acyclic and cyclic ketones. Whereas DMAD and 1-[1-phenyl-2-(phenylthio)ethenyl]pyrrolidine (3) give only
Harkema, S., Hummel, G.J. van, Reinhoudt, D.N., Trompenaars, W.P., Verboom, W., Visser, G.W.   +5 more
core   +3 more sources

Porous Phenazine‐bridged Tetraoxa[8]Circulenes for Selective Gold Recovery and Heterogeneous Catalysis

Angewandte Chemie, EarlyView.
Gold recycling from electronic waste using porous materials is an emerging concept to reduce the environmental impact of gold mining. In this work, we report the synthesis of a highly porous phenazine‐derived tetraoxa[8]circulene polymer and its utilization in gold capture and heterogeneous catalysis.
Patrick W. Fritz, Eylül Attar, Timur Ashirov, Krzysztof Piech, Ali Coskun   +4 more
wiley   +2 more sources

Red-Shifted Environmental Fluorophores and Their Use for the Detection of Gram-Negative Bacteria

Chemosensors, 2021
Two novel, water-soluble, merocyanine fluorophores were readily prepared by microwave-assisted synthesis. Full optical characterization was performed in a series of protic and aprotic solvents, and the dyes displayed fluorescence in the red region with ...
Alicia Megia-Fernandez, Maxime Klausen, Bethany Mills, Gillian E. Brown, Heather McEwan, Neil Finlayson, Kevin Dhaliwal, Mark Bradley   +7 more
doaj   +1 more source

Nucleofugalities of neutral leaving groups in 80% aqueous acetonitrile [PDF]

, 2016
Nucleofugalites of tetrahydrothiophene, dimethyl sulfide and differently substituted pyridines in 80 % aqueous acetonitrile have been derived from the SN1 solvolysis rate constants of the corresponding X,Y-substituted benzhydryl derivatives (1–10).
Jurić, Sandra, Kronja, Olga, Portolan, Toni   +2 more
core   +4 more sources