Results 211 to 220 of about 300,802 (279)

Cooperative effects in multivalent crown ether/ammonium assemblies

, 2016
Krbek, Larissa Katharina Sophie von
core  

CO₂ reduction to CO on an iron-porphyrin complex with crown-ether appended cation-binding site.

Dalton Trans
Zhu C, Surendran AK, D'Agostino C, Roithová J, de Visser SP.   +4 more
europepmc   +1 more source

Some of the next articles are maybe not open access.

Related searches:

Crown ethers in hydrogenated graphene

Physical Chemistry Chemical Physics, 2021
Graphane could serve as an ideal platform to rigidify the highly flexible crown ethers, which will greatly improve the binding strength and selectivity of crown ethers with metal cations and open up new applications for crown ethers and graphane.
Kai Guo, Sitong Liu, Haoming Tu, Zhikun Wang, Liang Chen, Haiqing Lin, Maosheng Miao, Jing Xu, Wei Liu   +8 more
openaire   +2 more sources

UNSATURATED CROWN ETHERS: STILBENO-CROWN ETHERS

Chemistry Letters, 1982
Abstract Stilbenocrown ethers 3a,c and 4a,b were synthesized in a cyclization reaction of benzoin with oligoethylene glycol ditosylates(2a-c) under a phase-transfer condition. Extractions of aqueous alkali picrates(Na+–Cs+) were examined with the distilbenocrown ethers 4a,b, the partially-hydrogenated tetraphenylcrown ethers 6a,b and the
Yoshihisa Inoue, Mikio Ouchi, Toshiyo Nakazato, Takashi Matsuda, Tadao Hakushi   +4 more
openaire   +1 more source

From Crown Ethers to Zeolites: Reaction of EtAlCl2 with Crown Ethers

Journal of Inclusion Phenomena, 1984
In contrast to aluminum alkyls, alkyl aluminum halides such as EtAlCl2 react with crown ethers to form cation-anion pairs which exhibit the liquid clathrate effect. Specifically, [12-C-4-·AlCl2][AlCl3Et] and [18-C-6·AlCl2][AlCl3Et] have been isolated and characterized by X-ray diffraction techniques.
Jerry L. Atwood, Hosny Elgamal, Gregory H. Robinson, Simon G. Bott, James A. Weeks, William E. Hunter   +5 more
openaire   +1 more source

Diaza-crown ethers—VI

Tetrahedron, 1980
Abstract The stability constants for the 1:1 complexes of 1,7,10,16-tetraoxa-4, 13-diazacyclooctadecane and 4,7,13,16,21,24-hexaoxa-1, 10-diazabicyclo[8,8,8]hexacosane with Na+, K+, Rb+ and Cs+ have been determined in acetonitrile at 25.0°C by conductivity measurements. The stability constants are considerably higher, and the selectivity is different,
S. Kulstad, L.Å. Malmsten
openaire   +1 more source

The discovery of crown ethers

Journal of Inclusion Phenomena and Molecular Recognition in Chemistry, 1988
The discovery of the crown ethers stemmed from efforts to control the catalytic activity of vanadium and copper by complexation with multidentate ligands. The first crown ether, 2,3,11,12-dibenzo-1,4,7,10,13,16-hexaoxacyclo-octadeca-2,11-diene, was obtained in 0.4% yield during an attempt to prepare a phenolic ligand from catechol and bis(2-chloroethyl)
openaire   +2 more sources

Antifungal Activity of Crown Ethers

Journal of Inclusion Phenomena, 1984
Some crown ethers were found to show significant antifungal activity against some wood-decay fungi, phytopathogenic fungi and eumycetes,Trichophytons for dermatomycosis. Their toxicity was evaluated by the paper disc method as well as by determining the values of ED50, i.e., the concentration which inhibits the mycelium growth by 50%.
Koji Yagi, Veronica Garcia, Ma. E. Rivas, Javier Salas, Andres Camargo, Takeo Tabata   +5 more
openaire   +1 more source

Novel crown ethers by oxidative cycloaddition of thiopheno crown ethers

Journal of the Chemical Society, Perkin Transactions 1, 1994
The synthesis of the thiopheno crown ethers 4 is described. The oxidative cycloaddition of these and the known thiopheno crown ethers 2 with N-phenylmaleimide is reported. The resulting sulfoxy-bridged cycloadducts 15 and 16 are transformed oxidatively into the phthalimido crown ethers 14 and 17.
YuanQiang Li, Thies Thiemann, Tsuyoshi Sawada, Masashi Tashiro   +3 more
openaire   +1 more source