hypsochromicadj.
/hɪpsəʊˈkrəʊmɪk/ Causing or characterized by a lightening of colour, or a shift of the absorption spectrum towards shorter wavelengths.
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hypsochrome1892
hypsochromic1892
1892 Jrnl. Chem. Soc. 62 i. 562 Definite atoms or groups of atoms on entering a molecule cause..a characteristic rise [read fall] (‘bathochromic groups’), or fall [read rise] (‘hypsochromic groups’), of the tint.
1932 S. J. Gregg tr. J. Eggert Physical Chem. 559 The hydrogen atom itself is hypsochromic in nature, for on removing the unsaturated character of a chromophoric group by adding hydrogen to it the absorption band migrates toward the ultra-violet.
1946 Ann. Rep. Progr. Chem. XLII. 118 For substituents attached to the carbonyl group, the effects are quite different, both λmax. and εmax. being usually decreased (hypso- and hypochromic effects).
1957 Jrnl. Biol. Chem. 229 716 In addition to the reduction in extinction there is a hypsochromic shift of 2 to 3 mμ accompanying the formation of the polymers.
1972 P. Rys & H. Zollinger Fund. Chem. & Applic. Dyes x. 153 As a rule, the vatting of indigo derivatives..produces a hyposchromic shift.
This entry has not yet been fully updated (first published 1976; most recently modified version published online March 2018).
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adj.1892