| 单词 |
thermochromism |
| 释义 |
thermochromism|θɜːməʊˈkrəʊmɪz(ə)m|
[ad. G. thermochromie (H. Stobbe 1904, in Ber. d. Deut. Chem. Ges. XXXVII. 2239), f. Gr. χρῶµα colour: see thermo- and -ism.]
The phenomenon whereby certain substances undergo a reversible change of colour or shade when heated or cooled. Also ˈthermochromy, in the same sense.
1911Chem. Abstr. V. 2087 Characteristics of ‘thermo⁓chromy’. 1914Ibid. VIII. 2387 The corresponding salts of the thiourethans..are colorless and do not exhibit thermochromism. 1960New Scientist 2 June 1424/1 In all cases where the substance was both thermochromic and photochromic the colour formed either by heat (thermochromism) or by ultra-violet irradiation at low temperature (photochromism) was spectroscopically identical. 1963[see photochromy c]. 1965New Scientist 14 Jan. 102/1 Thermochromy..may well be a quite general property of solids containing trivalent chromium ions. 1974Inorg. Chem. XIII. 2512/2 The thermo⁓chromism of these compounds involves a gradual change in color from gold to yellow to light green as the temperatures are lowered from 100° down to liquid nitrogen temperature.
So thermoˈchromic a., of, pertaining to, or displaying thermochromism.
1904Jrnl. Chem. Soc. LXXXVI. i. 672 (heading) Thermochromic properties of dibenzylidensuccinic anhydride. 1953[see photochromic a.]. 1965New Scientist 14 Jan. 102/1 Heating has the same effect and the higher the chromium content, the lower the temperature required for the ‘thermochromic’ transition. 1974Inorg. Chem. XIII. 2106/1 This salt is thermochromic: green at 25° and yellow at 80°. |
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