Jonas, Albert (2021). Blue precipitation – Color reaction where the solvent polarity changes in a thermochromic three‐component mixture. CHEMKON, 28 (8), pp. 349-352. 10.1002/ckon.202000071
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Thermochromicmixturesare designed in awaythat acolor former is reversibly or irreversibly convertedfrom acolorless to acolored statewhencombinedwithadeveloper underthe influenceofheat. In asimpleexperi-ment,the influenceofsolvent polarity on thecolor beha-vior of thermochromicmixtures is shown. In anon-polarsolvent, thecolor former is separatedfromasolidphase ofthedeveloper.Whenapolarsolvent is added, thedevel-oper dissolvesand is transferredtothe liquid phaseofthecolorformer, creating thecolored compound that is stabili-zedinthe polarphase.Further addition of polarsolventleadstodiscolorationsincethe developerismoresolubleinthesolvent mixture. Therefore, themetastabledye-devel-oper complexdissociates,and themixture gets colorlessagain. This aestheticexperimentprovides amotivatingin-troduction to thesubject of thermochromicmixtures.
Item Type: |
Journal Article (Original Article) |
|---|---|
PHBern Contributor: |
Jonas, Albert, Rubner, Isabel, Oetken, Marco |
ISSN: |
0944-5846 |
Language: |
German |
Submitter: |
Albert Jonas |
Date Deposited: |
22 Feb 2024 10:22 |
Last Modified: |
23 Feb 2024 22:51 |
Publisher DOI: |
10.1002/ckon.202000071 |
PHBern DOI: |
10.57694/7305 |
URI: |
https://phrepo.phbern.ch/id/eprint/7305 |
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