从大量氟化的基于三羧酸盐和四唑酸盐的配体合成了两个中孔氟化金属-有机骨架(MOF)。基于四唑酸盐的骨架MOFF-5的可及表面积为2445 m 2 g -1,是氟化MOF中最高的。MOFF-5的晶体吸附的碳氢化合物,碳氟化合物和氯氟碳化合物(CFC)(后两种是消耗臭氧层的物质和有力的温室物种),其承重能力高达225%。该材料对非球形分子的吸附表现出明显的偏爱,其结合了异常少量的四氟甲烷和六氟化硫。
Photocatalytic Hydrodefluorination: Facile Access to Partially Fluorinated Aromatics
作者:Sameera M. Senaweera、Anuradha Singh、Jimmie D. Weaver
DOI:10.1021/ja500031m
日期:2014.2.26
science as well as the pharmaceutical and agrochemical industries and yet are often difficult to access. This Communication describes a photocatalytic hydrodefluorination approach which begins with easily accessible perfluoroarenes and selectively reduces the C-F bonds. The method allows facileaccess to a number of partially fluorinated arenes and takes place with unprecedented catalytic activity
A transition‐metal‐free catalytic hydrodefluorination (HDF) reaction of polyfluoroarenes is described. The reaction involves direct hydride transfer from a hydrosilicate as the key intermediate, which is generated from a hydrosilane and a fluoride salt. The eliminated fluoride regenerates the hydrosilicate to complete the catalytic cycle. Dispersion‐corrected DFT calculations indicated that the HDF
描述了多氟芳烃的无过渡金属催化加氢脱氟(HDF)反应。该反应涉及从氢硅酸盐作为主要中间体的氢化物直接转移,这是由氢硅烷和氟化物盐生成的。除去的氟化物使氢硅酸盐再生,从而完成催化循环。分散校正的DFT计算表明HDF反应通过协调的亲核芳族取代(CS N Ar)过程进行。
Synthesis of polyfluoroarene-substituted benzofuran derivatives <i>via</i> cooperative Pd/Cu catalysis