×
验证码:
换一张
忘记密码?
记住我
×
登录
中文版
|
English
中国科学院青海盐湖研究所机构知识库
Knowledge Management System Of Qinghai Institute of Salt Lakes,CAS
登录
注册
ALL
ORCID
题名
作者
学科领域
关键词
资助项目
文献类型
出处
收录类别
出版者
发表日期
存缴日期
学科门类
学习讨论厅
粘贴图片网址
首页
研究单元&专题
作者
文献类型
学科分类
知识图谱
新闻&公告
在结果中检索
研究单元&专题
无
作者
无
文献类型
无
发表日期
无
语种
无
出处
无
资助项目
无
收录类别
无
资助机构
无
×
知识图谱
ISL OpenIR
开始提交
已提交作品
待认领作品
已认领作品
未提交全文
收藏管理
QQ客服
官方微博
反馈留言
没有检索到与您的查询相符的结果。
限定条件
语种:A rapid liquid X-ray diffractometer was used to study the time-averaged and space-averaged structure of aqueous sodium sulfate solutions at 298 and 323 K. Difference radial distribution functions of the solutions were obtained from accurate diffraction data. The interaction distances of Na( )-OH(2) and S-H(2)O in solutions were found to be 0.235 and 0.385 nm, respectively, after deconvolution of superposition peaks by Gaussian multi-peak fitting program. The characteristic distance of the NaSO (4) (-) contact ion pairs in higher concentration solutions was determined to be 0.345 nm, suggesting that the Na( ) ions coordinated with SO (4) (2-) ions in the mono-dentate form. Effects of concentration and temperature on the hydration structure of the solutions were discussed in the present paper. With a decrease in concentration, the contributions of the H(2)O to the diffraction pattern increase, the average coordination number of the Na( ) ions hardly changes, while the hydration number of SO (4) (2-) ions increases slightly. The formation of NaSO (4) (-) contact ion pairs becomes easier at higher temperature. The structure of hydrogen bond in dilute solutions is broken to a considerable extent with rising temperature, and the peak at 0.290 nm splits into two peaks at 0.275 and 0.305 nm, respectively. A rapid liquid X-ray diffractometer was used to study the time-averaged and space-averaged structure of aqueous sodium sulfate solutions at 298 and 323 K. Difference radial distribution functions of the solutions were obtained from accurate diffraction data. The interaction distances of Na( )-OH(2) and S-H(2)O in solutions were found to be 0.235 and 0.385 nm, respectively, after deconvolution of superposition peaks by Gaussian multi-peak fitting program. The characteristic distance of the NaSO (4) (-) contact ion pairs in higher concentration solutions was determined to be 0.345 nm, suggesting that the Na( ) ions coordinated with SO (4) (2-) ions in the mono-dentate form. Effects of concentration and temperature on the hydration structure of the solutions were discussed in the present paper. With a decrease in concentration, the contributions of the H(2)O to the diffraction pattern increase, the average coordination number of the Na( ) ions hardly changes, while the hydration number of SO (4) (2-) ions increases slightly. The formation of NaSO (4) (-) contact ion pairs becomes easier at higher temperature. The structure of hydrogen bond in dilute solutions is broken to a considerable extent with rising temperature, and the peak at 0.290 nm splits into two peaks at 0.275 and 0.305 nm, respectively.