Selective Hydrogenation of Phenol to Cyclohexanone in Water over Pd@N-Doped Carbon Derived from Ionic-Liquid Precursors
作者:Xuan Xu、Haoran Li、Yong Wang
DOI:10.1002/cctc.201402561
日期:2014.12
N‐doped carbon (CN‐x) derivedfrom N‐containing ionic‐liquid (IL) precursors were synthesized, and Pd@CN‐x prepared by a simple ultrasound‐assisted method showed higher catalytic activity for the selectivehydrogenation of phenol and its derivatives under mild reaction conditions in water than commercial Pd@C and other common Pd heterogeneous catalysts. The catalytic activities of Pd@CN‐x derived from
the type [E(CN)(n)(-)] x [B(C(6)F(5))(3)](n): E = N (dca_nb with n = 1, 2; b = B(C(6)F(5))(3)); E = C (tcm_nb with n = 1, 2, 3), and E = B (tcb_nb with n = 1, 2, 3, 4). Salts bearing these anions such as B[(CN) x B(C(6)F(5))(3)](4)(-) (= [B(CN)(4)(-)] x [B(C(6)F(5))(3)](4)), C[(CN) x B(C(6)F(5))(3)](3)(-) (= [C(CN)(3)(-)] x [B(C(6)F(5))(3)](3)), and N[(CN) x B(C(6)F(5))(3)](2)(-) (=[N(CN)(2)(-)] x [B(C(6)F(5))(3)](2))
将二氰胺 (dca)、三氰基甲烷 (tcm) 和四氰基硼酸盐 (tcb) 的碱金属盐或银盐添加到 B(C(6)F(5))(3) 的乙醚溶液中,得到含有大量 B( [E(CN)(n)(-)] x [B(C(6)F(5))(3)](n) 类型的 C(6)F(5))(3) 加合阴离子: E = N (dca_nb 与 n = 1, 2; b = B(C(6)F(5))(3)); E = C(tcm_nb,n = 1, 2, 3),E = B(tcb_nb,n = 1, 2, 3, 4)。带有这些阴离子的盐,例如 B[(CN) x B(C(6)F(5))(3)](4)(-) (= [B(CN)(4)(-)] x [B (C(6)F(5))(3)](4)), C[(CN) x B(C(6)F(5))(3)](3)(-) (= [C (CN)(3)(-)] x [B(C(6)F(5))(3)](3))
Synthetic Methods for Preparing Ionic Liquids Containing Hypophosphite and Carbon-Extended Dicyanamide Anions
作者:John P. Maciejewski、Haixiang Gao、Jean'ne M. Shreeve
DOI:10.1002/chem.201203740
日期:2013.2.25
Chemical methodology: New syntheticmethods to prepareionicliquidscontaining the hypophosphite (HP) and carbon‐extended dicyanamide (DCA) anions (vinylogous DCA and N,N′‐dicyanoformamide (DCF)) have been developed (see scheme). The performance of these materials as hypergolic ionicliquids has also been evaluated.
Carbene formation upon reactive dissolution of metal oxides in imidazolium ionic liquids
作者:Sil Wellens、Neil R. Brooks、Ben Thijs、Luc Van Meervelt、Koen Binnemans
DOI:10.1039/c3dt53024h
日期:——
of other metal oxides, namely copper(II) oxide, zinc(II) oxide and nickel(II) oxide, was also studied in imidazoliumionicliquids and it was found that stable zinc(II) carbenes were formed in solution, but these did not crystallise under the given experimental conditions. A crystalline nickel(II) carbene complex could be obtained from a solution of nickel(II) chloride dissolved in a mixture of 1-b
发现金属氧化物溶解在咪唑环的C 2位置具有氢原子的不同咪唑离子液体中,但是如果在C 2位置存在甲基取代基则没有。从包含溶解的氧化银(I)的离子液体中结晶的产物的晶体结构表明,这是银(I)卡宾络合物。通过13 C NMR光谱法证明了溶液中碳烯的存在,并且还通过拉曼光谱法监测了反应。还研究了咪唑鎓离子液体中其他金属氧化物,即氧化铜(II),氧化锌(II)和氧化镍(II)的溶解,发现稳定的锌(II)卡宾在溶液中形成,但在给定的实验条件下未结晶。从溶解在1-丁基-3-甲基咪唑鎓和1-乙基-3-甲基咪唑鎓乙酸酯的混合物中的氯化镍(II)溶液可以得到结晶的镍(II)卡宾配合物。
Iron nanoparticles with a square pyramidal structure in mesoporous carbons as an effective catalyst toward oxygen reduction
作者:Shou-Heng Liu、Sheng-Wei Yang、Shih-Che Chen
DOI:10.1039/c6ra22549g
日期:——
FeAMC-1273, with more pyridinic-N and pyridinic-N–Fe for the creation of a square pyramidal planar geometry around iron, exhibits the best ORR activity.