Results 61 to 70 of about 210,013 (270)

A Theoretical Investigation of the Selectivity of Aza-Crown Ether Structures Chelating Alkali Metal Cations for Potential Biosensing Applications

Molecules
Aza-crown ether structures have been proven to be effective in constructing fluorescent biosensors for selectively detecting and imaging alkali metal ions in biological environments. However, choosing the right aza-crown ether for a specific alkali metal
Mouhmad Elayyan, Mark R. Hoffmann, Binglin Sui   +2 more
doaj   +1 more source

Structural Study of Mismatched Disila-Crown Ether Complexes

Inorganics, 2017
Mismatched complexes of the alkali metals cations Li+ and Na+ were synthesized from 1,2-disila[18]crown-6 (1 and 2) and of K+ from 1,2,4,5-tetrasila[18]crown-6 (4).
Kirsten Reuter, Fabian Dankert, Carsten Donsbach, Carsten von Hänisch   +3 more
doaj   +1 more source

Short and efficient synthesis of thiol group functionalized crown ethers

, 2007
A synthesis of thiol group functionalized crown ethers is reported. The reaction is accomplished by the direct chlorosulfonation of simple crown ethers with chlorosulfonic acid and the reduction of the sulfonyl chloride moiety with LiAlH4 in two steps ...
Yang, B, Lu, XX, Chinese Acad Sci, Chengdu Inst Biol, Chengdu, Peoples R China., Lu, XX, Shi, L, Wang, R, Sun, Y   +5 more
core  

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

Supramolecular assembly of covalently modified Anderson-type polyoxometalates and crown ethers towards pseudo-rotaxane structures

Polyoxometalates
The supramolecular assembly of a series of covalently modified Anderson-type polyoxometalates (POMs) and 18-crown-6 ethers was investigated for the first time.
Yi-An Yin, Wu-Ji Chen, Chun-Yan Liu, Meng-Meng Zhang, Chang-Gen Lin, Haralampos N. Miras, Yu-Fei Song   +6 more
doaj   +1 more source

The synthesis and characterization of phosphine functionalized crown ethers by use of spectroscopic and x-ray methods

, 1995
The phosphine(III) crown ethers, [4'-(N-phenylaza-15crown-5)]3P (1), [4'-(N-phenylaza-l8-crown-6)]3P (2), [4'-(Naza-18-crown-6)]2-Ph-P (3), and [4'-(benzo-15-crown-5)]3P (4) were synthesized by using an electrophilic bromination of the crown phenyl ring (
Haddadian, Fereshteh
core  

Synthesis of new dibenzo-diaza-crown ethers

, 1996
A new method for the synthesis of dibenzo-diaza-crown ethers involving the 1:1-cyclocondensation of α,ω-contrafunctional amines is reported. A new method for the synthesis of dibenzo-diaza-crown ethers by cyclocondensation of α,ω-contrafunctional amines ...
Grell, E., Bernd Gersch, Gersch, B., Lehn, J., Jean-Marie Lehn, Ernst Grell   +5 more
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

Enantiodiscrimination Using a Chiral Crown Ether as a Chiral Solvating Agent Using NMR Spectroscopy

Natural Product Communications, 2019
For enantiomer separation of a variety of chiral compounds, a number of chiral selectors have been developed and applied. Among these chiral selectors are chiral crown ethers, a class of synthetic polyether molecules that bind protonated chiral primary ...
Wonjae Lee, Eunjung Bang, Ji-Hye Yun, Man-Jeong Paik, Weontae Lee   +4 more
doaj   +1 more source

Electrospray mass spectrometry : an investigation of non- covalent interactions of histone/crown ether complexes and applied methods of computational chemistry

, 1996
The focus of this research is to combine both computational as well as experimental methods to study the non-covalent interaction between a selected set of proteins with small molecules.
Nkansah, Shadrack Osei
core