以乙醇为溶剂、RhCl3.3H2O为铑源、三苯基膦(PPh3)为配体及甲醛为羰基源,在常压回流条件下一步法合成目标铑膦配合物HRh(CO)(PPh3)3,考察了不同氢源(H2、NaBH4和KOH)对铑膦配合物结构的影响.利用FT-IR、31P CP MAS NMR和XPS等对不同氢...以乙醇为溶剂、RhCl3.3H2O为铑源、三苯基膦(PPh3)为配体及甲醛为羰基源,在常压回流条件下一步法合成目标铑膦配合物HRh(CO)(PPh3)3,考察了不同氢源(H2、NaBH4和KOH)对铑膦配合物结构的影响.利用FT-IR、31P CP MAS NMR和XPS等对不同氢源条件下制备的铑膦配合物产物的结构进行表征.结果显示:以H2为氢源时,铑膦配合物产物主要为trans-RhCl(CO)(PPh3)2;以NaBH4为氢源时,产物为trans-RhCl(CO)(PPh3)2和HRh(CO)(PPh3)3的混合产物,同时甲醛溶液的滴加速度对产物的组成也有着重要影响,通过控制甲醛溶液的滴加速度可以有效抑制产物中trans-RhCl(CO)(PPh3)2的含量;以KOH为氢源时,产物为目标产物HRh(CO)(PPh3)3.展开更多
The intrinsic viscosity and viscometric interaction parameters of perfluorosulfonic acid （PFSA） and poly（vinyl alcohol） （PVA） were measured by dilute solution viscometry. The miscibility between PFSA and PVA was...The intrinsic viscosity and viscometric interaction parameters of perfluorosulfonic acid （PFSA） and poly（vinyl alcohol） （PVA） were measured by dilute solution viscometry. The miscibility between PFSA and PVA was estimated by the criteria of AB and μ. The results indicated that PFSA and PVA were completely miscible for any weight fraction in aqueous solution.展开更多
文摘以乙醇为溶剂、RhCl3.3H2O为铑源、三苯基膦(PPh3)为配体及甲醛为羰基源,在常压回流条件下一步法合成目标铑膦配合物HRh(CO)(PPh3)3,考察了不同氢源(H2、NaBH4和KOH)对铑膦配合物结构的影响.利用FT-IR、31P CP MAS NMR和XPS等对不同氢源条件下制备的铑膦配合物产物的结构进行表征.结果显示:以H2为氢源时,铑膦配合物产物主要为trans-RhCl(CO)(PPh3)2;以NaBH4为氢源时,产物为trans-RhCl(CO)(PPh3)2和HRh(CO)(PPh3)3的混合产物,同时甲醛溶液的滴加速度对产物的组成也有着重要影响,通过控制甲醛溶液的滴加速度可以有效抑制产物中trans-RhCl(CO)(PPh3)2的含量;以KOH为氢源时,产物为目标产物HRh(CO)(PPh3)3.
基金supported by the Innovation Program of Shanghai Municipal Education Commission (Grant No.09YZ163)
文摘The intrinsic viscosity and viscometric interaction parameters of perfluorosulfonic acid （PFSA） and poly（vinyl alcohol） （PVA） were measured by dilute solution viscometry. The miscibility between PFSA and PVA was estimated by the criteria of AB and μ. The results indicated that PFSA and PVA were completely miscible for any weight fraction in aqueous solution.
