英语词汇“halochromism”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

ˌhaloˈchromism n.

Brit.

/ˌhalə(ʊ)ˈkrəʊmɪz(ə)m/

U.S.

/ˌhæləˈkroʊˌmɪz(ə)m/

[ < German halochromie (Baeyer & Villiger 1902, in Berichte der Deutsch. Chem. Ges. 35 1190)] Chemistry the property possessed by certain colourless or faintly coloured compounds of becoming brilliantly coloured in the presence of acids or of certain other compounds.

ΘΚΠ

the world > matter > chemistry > chemical properties > [noun] > property of changing colour

halochromism1902

1902 Rep. Brit. Assoc. 119 Reference may be made to some recent work of v. Baeyer and Villiger on dibenzylidene acetone and triphenyl methane. They refer to the constitution of colourless substances which form highly coloured salts, and term the phenomenon halochromism.

1944 Hackh's Chem. Dict. (ed. 3) 395/1 Halochromism, the formation of colored salts from colorless organic bases by the addition of acids.

1952 K. Venkataraman Chem. Synthetic Dyes I. viii. 326 In the phenomenon of halochromism, the neutral organic compounds, which become brilliantly colored on the addition of hydrogen ion, are colored to about the same depth and intensity by the addition of neutral substances such as boron trichloride or stannic chloride instead of hydrogen ion.

单词	halochromism
释义	> as lemmas ˌhaloˈchromism ˌhaloˈchromism n. Brit. /ˌhalə(ʊ)ˈkrəʊmɪz(ə)m/ , U.S. /ˌhæləˈkroʊˌmɪz(ə)m/ [ < German halochromie (Baeyer & Villiger 1902, in Berichte der Deutsch. Chem. Ges. 35 1190)] Chemistry the property possessed by certain colourless or faintly coloured compounds of becoming brilliantly coloured in the presence of acids or of certain other compounds. ΘΚΠ the world > matter > chemistry > chemical properties > [noun] > property of changing colour halochromism1902 1902 Rep. Brit. Assoc. 119 Reference may be made to some recent work of v. Baeyer and Villiger on dibenzylidene acetone and triphenyl methane. They refer to the constitution of colourless substances which form highly coloured salts, and term the phenomenon halochromism. 1944 Hackh's Chem. Dict. (ed. 3) 395/1 Halochromism, the formation of colored salts from colorless organic bases by the addition of acids. 1952 K. Venkataraman Chem. Synthetic Dyes I. viii. 326 In the phenomenon of halochromism, the neutral organic compounds, which become brilliantly colored on the addition of hydrogen ion, are colored to about the same depth and intensity by the addition of neutral substances such as boron trichloride or stannic chloride instead of hydrogen ion. extracted from halo-comb. form¹ < as lemmas
随便看	methanes methanide methaniline methanogen methanogeneses methanogenesis methanogenic methanogens methanoic methanoic acid methanol methanolic methanols methanolysis methanometer methanotroph methanotrophic methantheline methantheline bromide methapyrilene methapyrilenes methaqualone methaqualones methe methedrine

> as lemmas