Solid-state polymerization behaviors of polydiacetylene nanofibers
Solid-state polymerization behaviors of polydiacetylene nanofibers
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DOI：
10.1080/15421406.2020.1741807
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发表时间：
2020-06-12
影响因子：
0.7
通讯作者：
Oikawa, Hidetoshi
中科院分区：
文献类型：
--
作者：
Chiba, Rie;Onodera, Tsunenobu;Oikawa, Hidetoshi
聚丁二炔（PDA）纳米纤维（NF）的固相聚合转化率曲线与PDA纳米晶（NC）的转化率曲线有很大的不同。PDA NF清楚地显示出较长的诱导期，并且转化率比PDA NC高得多。这些差异已经基于PDA NF和/或PDA NC中的热软化晶格进行了讨论。此外，与PDA体相晶体相比，PDA纳米纤维的激子吸收峰位置发生了红移。这一事实表明，PDA NF内的PDA链将几乎是无应变的，并且有效的π-缀合可能完全扩展到最大水平。
The conversion curve of solid-state polymerization in polydiacetylene (PDA) nanofibers (NFs) was so different from that of PDA nanocrystals (NCs). PDA NFs clearly showed the longer induction period, and the conversion rate was much higher than that of PDA NCs. These differences have been discussed on the basis of thermally softened crystal lattice in PDA NFs and/or PDA NCs. In addition, the excitonic absorption peak position of PDA NFs was red-shifted, compared with PDA bulk crystals. This fact suggests that PDA chains inside PDA NFs would be almost strain-free and the effective pi-conjugation is fully extended possibly to the maximum level.