Synthesis of Selected Novel Covalently Linked Flavoquinolones
作者:Ram Singh、Geetanjali
DOI:10.1055/s-2005-870019
日期:——
The synthesis of novel covalently linked flavoquinolones via amide bond is described using mixed anhydride method and their spectroscopic studies have been done by UV/Vis and 1H NMR spectroscopic data.
Electroactive materials, a process for their preparation as well as the
申请人:NKT Research Center A/S
公开号:US05708123A1
公开(公告)日:1998-01-13
Stable, electroactive material which when a potential is applied from the outside is subjected to one or more reversible redox reactions, for use in devices with an electrochromic display or another electrochromic color change or in batteries. The material comprises a condensed ring structure, the oxidized form of which is of the formula ##STR1## in which R.sub.1, R.sub.2, X, and A may have any meaning with the proviso that the condensed ring structure maintains the reversible properties. The material can be prepared by various processes and it is suited for use as electrochromic material for use in devices with an electrochromic display or as coating on windows because it presents a distinct and easily visible color change when it is subjected to a potential. In addition, the material is suited for use in rechargeable batteries because is possesses an excellent capacity and reversibility.
稳定的、电活性材料,当外部施加电势时,会经历一种或多种可逆的氧化还原反应,在电致变色显示器或其他电致变色装置或电池中使用。该材料包括一种紧凑的环状结构,其氧化形式的化学式为##STR1## 其中 R.sub.1、R.sub.2、X 和 A 可以具有任何含义,但紧凑的环状结构必须保持可逆性质。该材料可以通过各种工艺制备,适用于作为电致变色材料用于电致变色显示器中,或作为窗户的涂层,因为当其受到电势作用时,它呈现出明显且易于看到的颜色变化。此外,该材料适用于可充电电池,因为具有优异的容量和可逆性。
US5708123A
申请人:——
公开号:US5708123A
公开(公告)日:1998-01-13
Oxidation of sulfides with hydrogen peroxide catalyzed by 10,10′-linked bisflavinium perchlorates
作者:Yasushi Imada、Takashi Ohno、Takeshi Naota
DOI:10.1016/j.tetlet.2006.12.017
日期:2007.2
A series of bisflavinium perchlorates linked with methylene spacer at N10-position exhibit high catalytic activities for the oxidation of sulfides with hydrogenperoxide affording the corresponding sulfoxides. The kinetic studies revealed that the reaction rates are dependent on the spacer length of the catalysts due to their specific intramolecular electrochemical behaviors.