ZrCl_4/Hantzsch 1,4-dihydropyridine as a new and efficient reagent combination for the direct reductive amination of aldehydes and ketones with weakly basic amines

ZrCl4/Hantzsch 1,4-dihydropyridine is a mild and highly efficient reagent combination for the direct reductive amination. Weakly basic amines such as anilines substituted by electron-withdrawing group and heteroaromatic amines can be reductively alkylated with electron rich aldehydes and ketones under mild conditions to form the secondary amines in excellent yields.

PES/改性UiO⁃66复合膜的制备及其重金属离子分离性能研究

制备了锆1,4⁃羧基苯(UiO⁃66)系列金属有机骨架(MOF)材料,对比了不同MOF材料对重金属离子的吸附性能,并制备了聚醚砜/聚醚酰亚胺/改性MOF(PES/PEI/MOF)复合膜,对比了MOF添加量对膜重金属离子吸附和渗透性能的影响。结果表明,在UiO⁃66系列MOF材料中,UiO⁃66⁃NH2对重金属离子的吸附性能最好;在其负载量为15%(质量分数,下同)时,复合膜对重金属离子的截留性能最好。

四亚甲基双(环戊二烯基)二氯化钛、锆的合成和~1H NMR谱

文献中已报道了亚甲基桥联双环戊二烯基二氯化钛、锆、（CH2）n（C5H4）2MCl2（M=Ti、Zr;n=1,2,3）的合成和1HNMR谱。我们按如下反应合成了四亚甲基双（环戊二烯基）二氯化钛、锆化合物。