a substance resembling quinone in structure, properties, etc.
Word origin
quinone + -oid
quinoid in American English
(ˈkwɪnɔid)
Chemistry
noun
1.
a quinonoid substance
adjective
2.
quinonoid
Word origin
[1905–10; quin(one) + -oid]This word is first recorded in the period 1905–10. Other words that entered Englishat around the same time include: aspect ratio, jazz, push-up, revolving door, stabilizer-oid is a suffix meaning “resembling,” “like,” used in the formation of adjectives andnouns (and often implying an incomplete or imperfect resemblance to what is indicatedby the preceding element). Other words that use the affix -oid include: alkaloid, anthropoid, cuboid, lithoid, ovoid
Examples of 'quinoid' in a sentence
quinoid
A novel quinoid compound, which had anti-tumor activity, was isolated from the phage-challenged thermophile.
Chenxi Xu, Xumei Sun, Min Jin, Xiaobo Zhang 2017, 'A Novel Benzoquinone Compound Isolated from Deep-Sea Hydrothermal Vent Triggers Apoptosisof Tumor Cells', Marine Drugshttp://www.mdpi.com/1660-3397/15/7/200. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
In the solid state, the title compound exists in the enamine or quinoid form.
Muhabbat T. Honkeldieva, Samat A. Talipov, Rishad Kunafiev, Bakhtiyar T. Ibragimov 2015, 'Crystal structure of bis-p-anizidinegossypol with an unknown solvate', Acta Crystallographica Section E: Crystallographic Communicationshttp://scripts.iucr.org/cgi-bin/paper?S2056989015020393. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The landmark (non-aromatic) examples include quinoid rings, planar radicals and metal-chelate rings.
Krešimir Molčanov, Biserka Kojić-Prodić 2019, 'Towards understanding π-stacking interactions between non-aromatic rings', IUCrJhttp://scripts.iucr.org/cgi-bin/paper?S2052252519000186. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
A correspondingly higher concentration of quinoid structures was found.
Yao Chen,, Yongming Fan,, Mandla A. Tshabalala,, Nicole M. Stark,, Jianmin Gao,, RuijieLiu 2012, 'OPTICAL PROPERTY ANALYSIS OF THERMALLY AND PHOTOLYTICALLY AGED EUCALYPTUS CAMALDULENSISCHEMITHERMOMECHANICAL PULP (CTMP)', BioResourceshttp://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_07_2_1474_Chen_FTSGL_Optical_Anal_Aged_CTMP/1428. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The chemical structure analysis showed that this novel quinoid compound was 2-amino-6-hydroxy-[1,4]-benzoquinone.
Chenxi Xu, Xumei Sun, Min Jin, Xiaobo Zhang 2017, 'A Novel Benzoquinone Compound Isolated from Deep-Sea Hydrothermal Vent Triggers Apoptosisof Tumor Cells', Marine Drugshttp://www.mdpi.com/1660-3397/15/7/200. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The releases of acid and formation of quinoid compounds and carboxylic groups during heat treatment were confirmed.
Yao Chen,, Yongming Fan,, Jianmin Gao,, Nicole M Stark 2012, 'THE EFFECT OF HEAT TREATMENT ON THE CHEMICAL AND COLOR CHANGE OF BLACK LOCUST (ROBINIAPSEUDOACACIA) WOOD FLOUR', BioResourceshttp://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_07_1_1157_Chen_FGS_Heat_Treat_Chem_Color_Wood/1389. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)