A temperature-dependent hydrating water structure around chlorine anion
A temperature-dependent hydrating water structure around chlorine anion
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氯阴离子周围的温度依赖性补水结构
DOI:
10.1016/j.molliq.2020.114313
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发表时间:
2020-11
影响因子:
6
通讯作者:
Xuefeng Zhu
中科院分区:
文献类型:
--
作者:
Qingcheng Hu;Yuying Liang;Haiwen Zhao;Huimin Yang;Xuefeng Zhu
The hydrating water structure in NaCl aqueous solution has long been a controversial topic. We employ the Multivariate Curve Resolution method to get the solute-correlated (SC) OD/OH stretch bands from the Raman spectra of D2O/H2O–NaCl solutions at temperatures from 293 to 573 K. The largely narrowed SC bands remain a nearly constant wavenumber of the main peak with increasing temperature but get sunken around 2611 cm−1/3591 cm−1to let the ~2660 cm−1/~3635 cm−1modes be more prominent above a pivoting temperature (TP, ≈453 K/433 K for OD/OH bands). These spectral features incline to support a more flexible water structure in the Cl−hydration shell (CHS) balanced by the water–water hydrogen bond and water–Cl−bond. Most hydrating water molecules are engaged in hydrogen bonding configurations of single donor (SD) and single hydrogen-bond water (SHW). As temperature rises, the SD/SHW ratio in CHS first decreases belowTPbecause of the SD → SHW transition but then increases aboveTPowning to the rapid increase of the contact ion pairs. Moreover, we ascribe the differences between the SC OD and OH bands primarily to the stronger D2O–D2O hydrogen bond and D2O–Cl−bond.
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影响因子:
6
作者:
Gujt J;Bešter-Rogač M;Hribar-Lee B
通讯作者:
Hribar-Lee B
DOI:
10.32481/djph.2022.05.001
发表时间:
2022-05-31
期刊:
Delaware Journal of Public Health
影响因子:
--
作者:
通讯作者:
--
DOI:
10.1073/iti5109106
发表时间:
2009-12
期刊:
Proceedings of the National Academy of Sciences
影响因子:
--
作者:
通讯作者:
--
影响因子:
5.7
作者:
通讯作者:
--
DOI:
10.32481/djph.2020.11.001
发表时间:
2020-11-07
期刊:
Delaware Journal of Public Health
影响因子:
--
作者:
Khan OA;Gibbs TE
通讯作者:
Gibbs TE