| 单词 |
auxochrome |
| 释义 |
auxochrome|ˈɔːksəʊkrəʊm|
[G. (O. N. Witt 1888, in Ber. d. Deut. Chem. Ges. XXI. i. 325), f. Gr. αὔξ-ειν to increase + -o + χρῶµα colour.]
Any salt-forming group that, when combined with a chromogen, produces a dyestuff. Hence auxochromic |-ˈkrəʊmɪk|, auxochromous |-ˈkrəʊməs|, adjs., defining such groups.
1892Collin & Richardson tr. Nietzki's Chem. Org. Dyestuffs i. 13 The chromophoric quinone group confers strong acid properties on the auxochromic hydroxyl group. 1893Athenæum 15 July 100/1 They [sc. chromogens] become true dyestuffs by the introduction of..what Witt terms auxochromes. 1902Brit. Jrnl. Photogr. 11 Apr. 299 Auxochromic groups. 1902Encycl. Brit. XXVII. 564/2 Such compounds containing chromophorous groups are termed chromogens, because, although not dyestuffs themselves, they are capable of generating such by the further introduction of salt-forming atomic groups—e.g., OH, NH2. These Witt terms auxochromous groups. 1953J. Ramsbottom Mushrooms & Toadstools ix. 102 Other groups ({b1}OH, {b1}OCH3, {b1}CO2H, NH2), known as auxochromes, modify this basal colour in various ways. |
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