directional transfer of charge carriers are impracticable for extracting bulk excitons. To this issue, we here propose that the extraction of bulk exciton could be effectively implemented by surface modification. By taking confined layered bismuth oxycarbonate (Bi2O2CO3) as an example, we highlight that the incorporation of iodine atoms on the surface could modify the micro-region electronic structure and
从本体到表面提取光生物质是获得高效半导体光催化的重要过程。然而,与带电光生载流子相比,中性激子对电场的响应可以忽略不计。因此,涉及用于促进电荷载流子定向转移的带对齐构造的传统策略对于提取体激子是不切实际的。针对这个问题,我们在这里提出通过表面改性可以有效地实现体激子的提取。通过取密闭层状碳酸铋(Bi 2 O 2 CO 3) 作为一个例子,我们强调碘原子在表面的结合可以改变微区电子结构,从而导致表面激子态的能量降低。受益于本体激子态和表面激子态之间的能量梯度,碘修饰的 Bi 2 O 2 CO 3具有高效的本体激子提取,因此在触发1 O 2介导的选择性氧化反应方面表现出提升的性能。这项工作展示了表面改性在调节半导体基光催化剂的激子过程中的积极作用。
Selective Synthesis of Secondary Amines from Nitriles by a User‐Friendly Cobalt Catalyst
作者:Dipesh M. Sharma、Benudhar Punji
DOI:10.1002/adsc.201900586
日期:2019.9.3
Selective hydrogenation/reductive amination of nitriles to secondary amines catalyzed by an inexpensive and user‐friendly cobalt complex, (Xantphos)CoCl2, is reported. The use of (Xantphos)CoCl2 and ammonia borane (NH3−BH3) combination affords the selective reduction of nitriles to symmetrical secondary amines, whereas the employment of (Xantphos)CoCl2 and dimethylamine borane (Me2NH−BH3) along with
Platinum Nanoparticles Uniformly Dispersed on Covalent Organic Framework Supports for Selective Synthesis of Secondary Amines
作者:Nan Wang、Jianguo Liu、Long Tang、Chenguang Wang、Xinjun Li、Longlong Ma
DOI:10.1002/cctc.202101587
日期:2022.3.8
A COF support has been rationally designed for growing of uniformly dispersed platinumnanoparticles with a narrow size distribution. The hybrid composite exhibits high catalytic activity in the reductive amination of benzaldehyde towards secondary amines. This work opens an avenue towards controlling the interaction between active metals and support as well as rational design of catalyst for demanding
Turning the product selectivity of nitrile hydrogenation from primary to secondary amines by precise modification of Pd/SiC catalysts using NiO nanodots
different product is rarely achieved by modification of the catalysts. Hydrogenation of nitriles is an efficient and environmentally benign route for the synthesis of valuable amines, but it usually produces mixtures of primary, secondary and even tertiary amines. Herein we report that the selectivity of Pd/SiC catalysts for the hydrogenation of nitriles with H2 can be turned from primary to secondary amines
The present invention relates to selective NK-1 receptor antagonists of Formula (I) or a pharmaceutically acceptable salt thereof, for the treatment of disorders associated with an excess of tachykinins.