| 释义 |
quinonoid, a. Chem.|ˈkwɪnəʊnɔɪd|
[f. quinone + -oid.]
Being, resembling, or characteristic of a quinone; being or exhibiting a molecular structure typified by that of quinone, viz. a doubly unsaturated ring with double bonds to two substituents (usu. in para positions).
1878Chem. News 5 July 9/1 (heading) Quinonoid body found in a species of agaric. 1892Proc. Chem. Soc. VIII. 101 It was maintained that in the case of azo-dyes, the rosanilines, methylene-blue, &c., colour was conditioned by a quinonoid structure. 1908Jrnl. Chem. Soc. XCIV. i. 806 The meaning of the term quinonoid must be widened to include substances..in which the quinonoid oxygen atom is displaced by a bivalent imine or hydrocarbon group. 1951I. L. Finar Org. Chem. I. xxvii. 545 The yellow colour of p-benzoquinone is due to the presence of the quinonoid structure {b2}{btr1}{bbr1} {b2}{b2}{bbr1}{btr1}{b2} . 1956Nature 14 Jan. 79/2 The quinonoid product of the catecholase reaction..is an active oxidase in the cresolase reaction. 1974Ibid. 20 Dec. 710/2 The sclerotisation and tanning of insect cuticles is generally thought to result from a crosslinking of the cuticular proteins by quinonoid derivatives of tyrosine. |