排序方式: 共有5条查询结果,搜索用时 0 毫秒
1
1.
Diego AlvesMaraisa Sachini Raquel G. JacobEder J. Lenardão Maria E. ContreiraLucielli Savegnago Gelson Perin 《Tetrahedron letters》2011,52(1):133-135
PEG-400 and glycerol were successfully used as recyclable solvents for the synthesis of several organylthioenynes in good to excellent yields and high selectivity using solid supported catalyst (KF/Al2O3). This easy, general and improved method furnishes the corresponding alkenyl sulfides preferentially with Z configuration. The catalytic system and the glycerol or PEG-400 can be reused up to three times without previous treatment with comparable activity. 相似文献
2.
Sachini Rodrigo Disni Gunasekera Jyoti P. Mahajan Long Luo 《Current Opinion in Electrochemistry》2021
Electrochemical organic synthesis has recently attracted much attention because of its unique reactivity and environmentally benign approach. Conventional electrosynthesis uses either constant current or constant potential, known as direct current electrolysis. However, recently, alternating current electrolysis has begun receiving more attention. The purpose of this study is to give a short overview of the history and recent advances in the field of alternating current electrolysis for organic synthesis. 相似文献
3.
Milinda C. Senarathna Dr. He Li Sachini D. Perera Jose Torres-Correas Shashini D. Diwakara Samuel R. Boardman Noora M. Al-Kharji Dr. Yi Liu Prof. Ronald A. Smaldone 《Angewandte Chemie (International ed. in English)》2023,62(49):e202312617
Covalent organic frameworks (COFs) are known to be a promising class of materials for a wide range of applications, yet their poor solution processability limits their utility in many areas. Here we report a pore engineering method using hydrophilic side chains to improve the processability of hydrazone and β-ketoenamine-linked COFs and the production of flexible, crystalline films. Mechanical measurements of the free-standing COF films of COF-PEO-3 (hydrazone-linked) and TFP-PEO-3 (β-ketoenamine-linked), revealed a Young's modulus of 391.7 MPa and 1034.7 MPa, respectively. The solubility and excellent mechanical properties enabled the use of these COFs in dielectric devices. Specifically, the TFP-PEO-3 film-based dielectric capacitors display simultaneously high dielectric constant and breakdown strength, resulting in a discharged energy density of 11.22 J cm−3. This work offers a general approach for producing solution processable COFs and mechanically flexible COF-based films, which hold great potential for use in energy storage and flexible electronics applications. 相似文献
4.
Furtado F Galvosas P Gonçalves M Kopinke FD Naumov S Rodríguez-Reinoso F Roland U Valiullin R Kärger J 《Journal of the American Chemical Society》2011,133(8):2437-2443
Pulsed field gradient NMR is applied for monitoring the diffusion properties of guest molecules in hierarchical pore systems after pressure variation in the external atmosphere. Following previous studies with purely mesoporous solids, also in the material containing both micro- and mesopores (activated carbon MA2), the diffusivity of the guest molecules (cyclohexane) is found to be most decisively determined by the sample "history": at a given external pressure, diffusivities are always found to be larger if they are measured after pressure decrease (i.e., on the "desorption" branch) rather than after pressure increase (adsorption branch). Simple model consideration reproduces the order of magnitude of the measured diffusivities as well as the tendencies in their relation to each other and their concentration dependence. 相似文献
5.
Francine Novack Victoria Ctia S. Radatz Maraisa Sachini Raquel G. Jacob Gelson Perin Wladimir P. da Silva Eder J. Lenardo 《Tetrahedron letters》2009,50(49):6761-6763
2-Phenylseleno aldehydes and ketones were selectively obtained using solid-supported catalyst (KF/Al2O3) and PEG-400 as clean, recyclable medium in good to excellent yields. The method was applied in the preparation of highly functionalized 2-phenylseleno citronellal and citronellol, potential bactericide agents. The catalytic system KF/Al2O3 and PEG-400 can be re-used for four times without previous treatment. 相似文献
1