Results 41 to 50 of about 841,438 (283)
Beverages, 2020 Coffee is one of the most common drinks worldwide. Due to the variability of elements composition, coffee is important for human health. The aim of this study is to assess the concentration of certain selected elements of commercial samples of roasted ...
Sati Y. Al-Dalain +4 more
doaj +1 more source
, 2005 Photostimulated electron detachment from aqueous inorganic anions is the simplest example of solvent-mediated electron transfer. Here we contrast the behavior of halide anions with that of small polyatomic anions, such as pseudohalide anions (e.g., HS ...
Bradforth, Stephen E. +5 more
core +1 more source
Modeling Carbon Chain Anions in L1527 [PDF]
, 2008 The low-mass protostellar region L1527 is unusual because it contains observable abundances of unsaturated carbon-chain molecules including CnH radicals, H2Cn carbenes, cyanopolyynes, and the negative ions C4H- and C6H-, all of which are more associated ...
Harada, Nanase, Herbst, Eric
core +3 more sources
Anion–Anion Proton Transfer in Hydrogen Bonded Complexes
Chemistry – An Asian Journal, 2010 AbstractComplexation of dihydrogen phosphate by an anion receptor containing six hydrogen bond donor groups has been shown to reduce the pKa of the bound anionic species to such an extent that addition of further aliquots of dihydrogen phosphate result in deprotonation of the bound species with the resultant formation of a monohydrogen phosphate ...
GALE P. A +5 more
openaire +6 more sources
, 2004 Time resolved transient absorption spectroscopy has been used to determine quantum yields for electron photodetachment in 193 nm and (where possible) 248 nm laser excitation of miscellaneous aqueous anions, including hexacyanoferrate(II), sulfate ...
Crowell, R. A. +2 more
core +1 more source
Formation and structural chemistry of the unusual cyanide-bridged dinuclear species [Ru-2(NN)(2)(CN)(7)](3-)(NN=2,2 '-bipyridine or 1,10-phenanthroline) [PDF]
, 2009 Crystallisation of simple cyanoruthenate complex anions [Ru(NN)(CN)(4)](2) (NN = 2,2'-bipyridine or 1,10-phenanthroline) in the presence of Lewis-acidic cations such as Ln(III) or guanidinium cations results, in addition to the expected [Ru(NN)(CN)(4)](2)
Adams +19 more
core +1 more source
Anion receptors containing thiazine-1,1-dioxide heterocycles as hydrogen bond donors
Beilstein Journal of Organic Chemistry, 2010 The synthesis, X-ray crystal structures and anion recognition properties of two receptors containing thiazine-1,1-dioxide heterocycles as hydrogen bond donating subunits are reported.
Hong-Bo Wang +2 more
doaj +1 more source
Singlet Excited States of Anions with Higher Main Group Elements
, 2013 Previous studies have shown that dipole-bound excited states exist for certain small anions. However, valence excited states have been reported for some closed-shell anions, but those with singlet valence excited states have, thus far, contained a single
Fortenberry, Ryan C.
core +1 more source
Salt-doped block copolymers: ion distribution, domain spacing and effective χ parameter [PDF]
, 2012 We develop a self-consistent field theory for salt-doped diblock copolymers, such as polyethylene oxide (PEO)–polystyrene with added lithium salts.
Nakamura, Issei, Wang, Zhen-Gang
core +1 more source
Laser Cooling of Molecular Anions [PDF]
, 2015 We propose a scheme for laser cooling of negatively charged molecules. We briefly summarise the requirements for such laser cooling and we identify a number of potential candidates.
Comparat, Daniel +4 more
core +4 more sources