Results 71 to 80 of about 300,802 (279)

Metal‐Ion Regulated Light‐Free Z→E Isomerization of Azobenzene Glycomacrocycle

Chemistry – A European Journal, EarlyView.
Metal ion‐catalyzed Z→E isomerization of photoswitchable azobenzene glycomacrocycle: A new azobenzene‐based glycomacrocycle is capable of forming a 1:1 complex with divalent metal ions in both E‐ and Z‐isomers. The complexes undergo light‐free Z→E isomerization in a timescale spanning from seconds to weeks.
Yang Zhou, Jinbiao Jiao, Mathieu Lordez, Jean‐Yves Salpin, Juan Xie   +4 more
wiley   +1 more source

Synthetic and structural investigations of neutral solvent/crown ether interactions and f-element/crown ether complexation [PDF]

, 1987
In my senior honors research project, the study of neutral solvent/crown ether interactions and f-element/crown ether complexes, I have been investigating the conditions under which water molecules may be excluded from a late lanthanide ion\u27s primary ...
Voss, Eric John
core   +1 more source

Microwave Irradiation-Assisted Synthesis of a Novel Crown Ether Crosslinked Chitosan as a Chelating Agent for Heavy Metal Ions (M+n)

Molecules, 2010
Microwave irradiation was used to obtain a di-Schiff base type crosslinked chitosan dibenzocrown ether (CCdBE) via the reaction between the –NH2 and –CHO groups in chitosan and 4,4′-diformyldibenzo-18-c-6, respectively.
Ibrahim A. Alsarra, Awwad A. Radwan, Fars K. Alanazi   +2 more
doaj   +1 more source

Deriving General Energy Predictors for Pnictogen Bonding

Chemistry – A European Journal, EarlyView.
This study derives general energetic predictors for pure pnictogen bonds from nitrogen to bismuth based on the potential energy density at the bond critical point. The research highlights the increasing occurrence of secondary interactions for heavier elements.
Jan Langwald, Antonio Frontera
wiley   +1 more source

SYNTHESIS OF FAUJASITE ZEOLITES WITH CROWN-ETHER TEMPLATES [PDF]

, 2011
[[abstract]]The function of crown ethers in the synthesis of faujasite zeolites has been studied. Hexagonal faujasite (EMT) was prepared from 18-crown-6 ether and not from 15-crown-5 ether as the organic template under hydrothermal conditions, whereas ...
WU, CN;CHAO, KJ
core   +1 more source

Syntheses and Properties of Pentafluoroethylplumbanes in the Oxidation States +II, +III, and +IV

Chemistry – A European Journal, EarlyView.
Syntheses of pentafluoroethyl substituted plumbanes in the formal oxidation states +II, +III, and +IV are reported. The compounds were characterized by multinuclear NMR spectroscopy, including 207Pb NMR spectroscopy, mass spectrometry and single‐crystal x‐ray diffraction experiments. ABSTRACT Mono‐, bis‐, and tris(pentafluoroethyl)plumbanes of the type
Michael Grasse, Lukas Hartmann, Beate Neumann, Hans‐Georg Stammler, Berthold Hoge   +4 more
wiley   +1 more source

(1,4,7,10-Tetraoxacyclododecane)(trideuteroacetonitrile)lithium perchlorate

Acta Crystallographica Section E, 2010
In the title compound, [Li(C8H16O4)(CD3CN)]ClO4, the Li atom is pentacoordinate. The O atoms of the 12-crown-4 ether form the basal plane, whereas the N atom of the trideuteroacetonitrile occupies the apical position.
Ilia A. Guzei, Lara C. Spencer, Lingyun Xiao, Ronald R. Burnette   +3 more
doaj   +1 more source

Modulation of Epigenetic Control by Advanced Molecular Tweezers

Chemistry – A European Journal, EarlyView.
Tailored dimeric molecular tweezers recognize the DNA‐binding part of Histone H4 and interrupt the essential histone‐DNA interaction. ABSTRACT This work addresses the question if supramolecular systems can be tailored to interfere with posttranslational modifications (PTM) and epigenetics.
My‐Hue‐Le, Bianca Kamba, Anja Matena, Christine Beuck, Victoria Momand, Spiros Salvanos, Jessica Vossen, Mike Blueggel, Thomas Schrader, Peter Bayer   +9 more
wiley   +1 more source

A covalent organic framework membrane with highly selective and permeable artificial sodium channels via ion recognition

Nature Communications
Biological sodium channels efficiently discriminate between same–charge ions with similar hydration shells. However, achieving precise ion selectivity and high throughput in artificial ion channel fabrication remains challenging.
Jing Wang, Junwei Zhang, Pengrui Jin, He Wen, Ziwen Dai, Hao Tan, Shushan Yuan, Jiakuan Yang, Menachem Elimelech   +8 more
doaj   +1 more source

Diaqua(1,4,7,10,13-pentaoxacyclopentadecane)iron(II) bis(μ-cis-1,2-dicyano-1,2-ethylenedithiolato)bis[(cis-1,2-dicyano-1,2-ethylenedithiolato)ferrate(III)] 1,4,7,10,13-pentaoxacyclopentadecane disolvate

Acta Crystallographica Section E, 2008
The title compound, [Fe(C10H20O5)(H2O)2][Fe2(C4N2S2)4]·2C10H20O5, consists of an [FeII(15-crown-5)(H2O)2]2+ cation, sandwiched between and O—H...O hydrogen bonded by two additional 15-crown-5 ether molecules and two independent [FeIII(mnt)2 ...
Ken Sakai, Shigeyuki Masaoka, Toshiki Yamaguchi   +2 more
doaj   +1 more source