Distinct changes of Debye relaxation in primary and secondary monoalcohols by carbon nano-dots
Distinct changes of Debye relaxation in primary and secondary monoalcohols by carbon nano-dots
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碳纳米点对伯和仲一元醇德拜弛豫的明显变化
DOI：
10.1016/j.molliq.2019.111738
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发表时间：
2020
影响因子：
6
通讯作者：
Wang Li-Min
中科院分区：
文献类型：
--
作者：
Guo Yuxing;Jin Xiao;Kang Zhenhui;Wang Li-Min
The origin of the dielectric Debye relaxation in monoalcohols has kept interests for decades. In this work, we explored the Debye relaxation in a primary alcohol, 2-ethyl-1-hexanol, and a secondary one, 4-methyl-3-heptanol, by doping with carbon nano-dots. Dielectric and infrared spectra of the pure and doped samples were measured. We found that doping in 2-ethyl-1-hexanol decreases slightly the Debye relaxation strength together with a subtle decrease in the relaxation time, while, strikingly, the Debye relaxation strength in 4-methyl-3-heptanol is enhanced significantly, accompanied by increased relaxation time. Differently, the relaxation strength of the structural α-relaxation is both enhanced in the two monoalcohols. The infrared measurements reveal an evident increase in the fraction of associated hydrogen bonds for the doped 4-methyl-3-heptanol when compared to the pure sample. In contrast, only trivial difference is exhibited for the case of 2-ethyl-1-hexanol and its doped one. The remarkable effects of the carbon nano-dots on the Debye relaxation in the tested 4-methyl-3-heptanol sample could suggest the preferential transition from H-bond rings to chains.
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DOI：
10.1063/1.4947470
发表时间：
2016-02
期刊：
--
影响因子：
--
作者：
T. Hecksher
通讯作者：
T. Hecksher
DOI：
10.1063/1.4978585
发表时间：
2017-03
期刊：
The Journal of chemical physics
影响因子：
--
作者：
S. Arrese-Igor;Á. Alegría;J. Colmenero
通讯作者：
S. Arrese-Igor;Á. Alegría;J. Colmenero
DOI：
10.1021/jp054542k
发表时间：
2005-11
期刊：
The journal of physical chemistry. B
影响因子：
--
作者：
Li-Min Wang;Shervin Shahriari;R. Richert
通讯作者：
Li-Min Wang;Shervin Shahriari;R. Richert
影响因子：
8.6
作者：
Gainaru, C.;Meier, R.;Boehmer, R.
通讯作者：
Boehmer, R.
影响因子：
56.9
作者：
Lee, Hau-Nan;Paeng, Keewook;Ediger, M. D.
通讯作者：
Ediger, M. D.