- viologen
- vi·ol·o·gen
English syllables. 2014.
viologen
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Viologen — The Viologens are diquaternary derivatives of 4,4 bipyridyl. The name comes from the fact that this class of compounds is easily reduced to the radical mono cation, which is intensely blue coloured. In an experimental electrolysis setup, viologen … Wikipedia
viologen — noun Any of a class of quaternary ammonium salts derived from 4,4 bipyridine … Wiktionary
Viologen — Vi|o|lo|gen [violett, (nlat. Viola = Veilchen); ↑ gen], das; s, e: Sammelbez. für quartäre 4,4′ Bipyridiniumsalze, bei deren Red. durch Pimerisation intensiv farbige Radikale (↑ Semichinone) entstehen. Die V. eignen sich deshalb als… … Universal-Lexikon
viologen — ˈvīələjə̇n noun ( s) Etymology: violet + o + gen : a chloride of any of several bases used as an oxidation reduction indicator because color is exhibited in the reduced form … Useful english dictionary
Electrochromism — is the phenomenon displayed by some chemical species of reversibly changing color when a burst of charge is applied.One good example of an electrochromic material is polyaniline which can be formed either by the electrochemical or chemical… … Wikipedia
Cucurbituril — Computer models of Q5, Q6, and Q7. Top row is the view into the cavity and the bottom is the side view Cucurbiturils are methylene linked macrocyclic molecules made of glycoluril [=C4H2N4O2=] monomers. The oxygen atoms are located along the edges … Wikipedia
Paraquat — This article is about the herbicide. For the British military operation to recapture South Georgia, see Operation Paraquat. Paraquat … Wikipedia
Non-Kekulé molecule — Examples of non Kekulé (a) polyenes, (b) quinodimethanes, and (c) polynuclear aromatics A non Kekulé molecule is a conjugated hydrocarbon that cannot be assigned classical Kekulé structures. Since non Kekulé molecules have two or more formal… … Wikipedia
Chlorophyllin — Other names Natural green 3, E141 Identifiers … Wikipedia
Supramolecular chemistry — refers to the area of chemistry that focuses on the noncovalent bonding interactions of molecules. [cite journal | author=Lehn JM | title=Supramolecular chemistry | journal=Science | volume=260 | issue=5115 | year=1993 | pages=1762–3 |… … Wikipedia
