期刊
DYES AND PIGMENTS
卷 192, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2021.109397
关键词
Polydiacetylene; Color change pigment; Topochemical polymerization; In situ characterization; Thermochromism
资金
- Innovate UK [509925]
- DataLase Ltd
- EPSRC [EP/N009134/1]
- EPSRC [EP/N009134/1] Funding Source: UKRI
- Innovate UK [509925] Funding Source: UKRI
A library of closely related diacetylenes has been synthesized, with color changes analyzed using various analytical techniques. The diacetylenes with cycloalkyl substituents show greater sensitivity to changes in molecular structure and higher stability compared to those with n-alkyl substituents.
A library of closely related diacetylenes has been synthesised, comprising docosa-10,12-diynediamides with small n-alkyl or cycloalkyl substituents on the termini. Colour changes of these solids in response to ultraviolet (UV) radiation and heating were analysed using a range of analytical techniques, including UV-visible/nearinfrared reflectance, hand-held Raman and solid-state nuclear magnetic resonance (ssNMR) spectroscopies. Colorimetric studies showed that this class of diacetylene undergoes clear colour changes that are very sensitive to even small alterations in molecular structure. The colour change transitions of diacetylenes bearing either cyclopentyl or cyclohexyl substituents were more similar to each other than to those of analogous diacetylenes bearing either n-pentyl or n-hexyl substituents. Differential scanning calorimetry (DSC) also reflected these differences, with the cycloalkyl substituted diacetylenes showing endothermic transitions at significantly higher temperatures than both acyclic analogues. From this library, an n-hexyl substituted diacetylene shows the greatest potential as a colour change pigment, with three distinct colours that are stable at room temperature (white, blue, red), as well as an unstable yellow colour at elevated temperatures.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据