In situ generated and stabilized Pd nanoparticles by N<sup>2</sup>,N<sup>4</sup>,N<sup>6</sup>-tridodecyl-1,3,5-triazine-2,4,6-triamine (TDTAT) as a reactive and efficient catalyst for the Suzuki–Miyaura reaction in water
作者:Nasser Iranpoor、Sajjad Rahimi、Farhad Panahi
DOI:10.1039/c5ra24120k
日期:——
The Suzuki–Miyaura coupling reaction was efficiently catalyzed by the in situ generated and stabilized Pd nanoparticles employing TDTAT in water.
Suzuki–Miyaura 偶联反应在水中通过 in situ 生成和稳定的 Pd 纳米颗粒,利用 TDTAT 有效催化。
L-도파 전구체 화합물, 이의 제조방법, 및 이를 이용한 18F 표지 L-도파의 제조방법
申请人:Gachon University of Industry-Academic cooperation Foundation 가천대학교 산학협력단(220040376324) BRN ▼129-82-07687
公开号:KR20190061368A
公开(公告)日:2019-06-05
본 발명은 L-도파 전구체 화합물, 이의 제조방법, 및 이를 이용한 F 표지 L-도파의 제조방법에 관한 것으로, 본 발명에 따른 신규 L-도파 전구체를 사용한 F 표지된 L-도파의 제조방법은, F의 표지효율을 향상시킬 수 있고, 표지반응 후, 생성물의 분리 정제 단계를 연속적으로 수행할 수 있는 On-column 표지법(컬럼을 통과하면서 표지하는 방법)으로 수행될 수 있는 바, 최종 생성물인 F 표지된 L-도파를 종래 방법 대비 고수율로 수득할 수 있고, 나아가 bead 표지법 등의 다양한 방법의 적용에 용이한 장점을 가진다. 특히, F 자체가 반응 방사화학적 수율이 낮고, 종래의 표지 방법은 반응 단계 및 시간이 긴 단점이 있었던 점을 고려할 때, 본 발명의 신규 L-도파 전구체를 사용한 F 표지된 L-도파의 제조방법이 가지는 장점은 경제적 관점과 산업적 측면에서도 유용한 효과이다.
realize efficient CO2 electroreduction into formateover a widepotentialwindow, however, they will undergo in situ structural evolution under the reaction conditions. Therefore, clarifying the structural evolution process, the real active site and the catalytic mechanism is significant. Here, taking Cu2SnS3 as an example, we unveiled that Cu2SnS3 occurred self-adapted phaseseparation toward forming the
双金属硫化物有望在较宽的电位窗口内实现有效的 CO 2电还原成甲酸盐,然而,它们将在反应条件下进行原位结构演变。因此,阐明结构演化过程、真正的活性位点和催化机制具有重要意义。在这里,以Cu 2 SnS 3为例,我们揭示了Cu 2 SnS 3发生自适应相分离,形成稳定的SnO 2 @CuS 和SnO 2 @Cu 2电化学过程中的 O 异质结。计算表明,强耦合界面作为真正的活性位点驱动电子自流从 Sn 4+到 Cu +,从而促进离域的 Sn 位点将 HCOO* 与 H* 结合。Cu 2 SnS 3纳米片在-0.6 V 至-1.1 V 的宽电位范围内实现了超过83.4% 的甲酸盐选择性。我们的研究结果提供了对CO 2电还原下三元硫化物的结构演化过程和性能增强起源的深入了解。
Delaminated layered double hydroxides as catalysts for the Meerwein–Ponndorf–Verley reaction
作者:Julia M. Hidalgo、César Jiménez-Sanchidrián、José Rafael Ruiz
DOI:10.1016/j.apcata.2013.11.007
日期:2014.1
dodecylbenzenesulphonate, nitrate or hydroxyl ions. Some of these solids exhibited moderate catalytic activity in the MPV reaction of benzaldehyde with 2-propanol. The reaction was conducted at 82 °C (0.06 mol of 2-propanol was treated with 0.003 mol of benzaldehyde in the presence of 1 g of catalyst). Calcining at 450 °C the delaminated LDHs, however, provided solids with a high surface activity that made
Meerwein-Ponndorf-Verley(MPV)反应涉及通过用作氢供体的醇对羰基化合物的氢转移还原。该方法由均相和非均相催化剂催化。后者可以是酸或碱类型的。在这项工作中,我们结合使用了分层和离子交换,以从层状双氢氧化物(LDHs)中获得分层的固体。使用共沉淀法或通过水合将含碳酸盐的LDH碳酸盐煅烧而获得的固体进行再水化处理,制备了三种含碳酸盐,羟基或十二烷基苯磺酸盐(DBS)的Mg / Al LDH(Mg / Al比= 2)。LDH的X射线衍射图表现出插入碳酸根,羟基或DBS离子的LDH的典型谱线。通过在60°C超声处理此固体在1-丁醇中的悬浮液,对含DBS的LDH进行分层。通过搅拌该分层的LDH在1-丁醇中的适量Ca(NO)悬浮液,可以使该分层的LDH中的DBS离子与硝酸根或氢氧根离子交换。3)3 Ca(OH)2, 分别。所得的分层固体由类似水镁石的纳米层组成,其中的过量电荷被
Water-soluble and highly emissive near-infrared nano-probes by co-assembly of ionic amphiphiles: towards application in cell imaging
作者:Yuzhi Xing、Dahua Li、Bin Dong、Xiaocheng Wang、Chengfeng Wu、Lan Ding、Shixin Zhou、Jian Fan、Bo Song
DOI:10.1039/c9nj01184f
日期:——
fluorescent dye (denoted by PBI-TPE-11), a bolaamphiphile bearing conjugated tetraphenylethylene and perylenebisimide in the middle and two aliphatic pyridinium groups at both ends. PBI-TPE-11 self-assembled into flake-like nanostructures in aqueous solution and showed very weak fluorescence emission from 600 to 830 nm, covering the NIR region. This result seems discrepant with that previously reported