• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Bulletin of the Chemical Society of Japan >Remarkable Enhancement Effect of 2,2,2-Trifluoroethanol on the Solubility of Tris(pentane-2,4-dionato)chromium(III)in Supercritical Carbon Dioxide by Outer-Sphere Complexation through Hydrogen Bonding
【24h】

Remarkable Enhancement Effect of 2,2,2-Trifluoroethanol on the Solubility of Tris(pentane-2,4-dionato)chromium(III)in Supercritical Carbon Dioxide by Outer-Sphere Complexation through Hydrogen Bonding

机译：2,2,2-三氟乙醇通过氢键外球面络合对超临界二氧化碳中三（戊烷-2,4-去离子基）铬（III）溶解度的显着增强作用

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The solubility of tris(pentane-2,4-dionato)chromium(III)(Cr(acac)_3)in supercritical carbon dioxide(SC-CO_2)with and without modifiers was investigated by UV-vis spectrophotometry.The influence of some polar and nonpolar modifiers,such as methanol,ethanol,2,2,2-trifluoroethanol(TFE),acetone,chloroform,and benzene,was studied by changing the temperature,pressure,and concentration of the modifiers.Alcohols,particularly TFE,demonstrated a large solubility enhancement of Cr(acac)_3 among these modifiers.In contrast,acetone having a relatively larger polarity gave a lower enhancement effect than chloroform and benzene.The measurement of the IR absorption spectra of TFE in the presence of Cr(acac)_3 in SC-CO_2 suggested that a drastic solubility enhancement of Cr(acac)_3 upon the addition of TFE could be ascribed to the formation of the stable Cr(acac)_3-TFE complex through hydrogen bonding.The association constants of Cr(acac)_3 with TFE in SC-CO_2 could be determined from the relationship of the solubility enhancement against the TFE concentration.
机译：通过紫外-可见分光光度法研究了三（戊烷-2,4-二价铬）铬（III）（Cr（acac）_3）在超临界二氧化碳（SC-CO_2）中和不使用改性剂时的溶解度。通过改变温度，压力和浓度来研究非极性改性剂，例如甲醇，乙醇，2,2,2-三氟乙醇（TFE），丙酮，氯仿和苯。酒精，特别是TFE，证明了在这些改性剂中，Cr（acac）_3的溶解度大大提高。相反，极性相对较大的丙酮比氯仿和苯的增强效果更低。在存在Cr（acac）_3的情况下TFE的红外吸收光谱的测量在SC-CO_2中的研究表明，添加TFE后Cr（acac）_3的剧烈溶解性增强可归因于通过氢键形成稳定的Cr（acac）_3-TFE配合物.Cr（acac）的缔合常数可以根据以下关系确定_3与SC-CO_2中的TFE溶解度提高对TFE浓度的影响。

著录项

相似文献

  • 外文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号