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viologen

Line breaks: vi|olo¦gen
Pronunciation: /vʌɪˈəʊlədʒ(ə)n
 
/

Definition of viologen in English:

noun

Chemistry
Any of a series of synthetic compounds related to the weedkiller paraquat, used as redox indicators. They contain heteroaromatic cations of the general formula (C5H4NR)22+.
Example sentences
  • The intermolecular interactions between the viologens and the macrocyclic molecule were investigated in a solution before photoirradiation.
  • Methyl viologen also affects electron-transducing reactions in the endoplasmic reticulum and in mitochondria.
  • The transgenic plants were also more tolerant to the oxidative damage caused by methyl viologen showing less chlorosis and less electrolyte leakage than the controls.

Origin

1930s: from violet (because of the purple colour when electrochemically reduced) + -gen.

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