Synthesis and evaluation of antioxidative properties of a series of organoselenium compounds
摘要:
A series of organoselenocyanate compounds 4a-d were synthesized utilizing 1,8-naphthalic anhydride as the building unit. These compounds were evaluated for their antioxidative activities against DMBA-PMA-induced oxidative stress in a two-stage mouse skin carcinogenic model. Compound 4d was found to have the maximum antioxidative property in comparison with the other compounds. Also, the pretreatment group showed better results than the concomitant treatment groups.(c) 2005 Elsevier Ltd. All rights reserved.
Photoinduced Electron Transfer in Covalently Linked 1,8-Naphthalimide/Viologen Systems
作者:Thao P. Le、Joy E. Rogers、Lisa A. Kelly
DOI:10.1021/jp000855y
日期:2000.7.1
A series of polymethylene-linked 1,8-naphthalimide/viologen diads has been synthesized. The number of intervening methylenes was varied from 2 to 6. For comparison, a series of N-alkylpyridiniumyl-1,8-naphthalimide “parent” compounds was prepared and photophysically characterized. Relative to the parent compounds, the electronically excited singlet state of the 1,8-naphthalimide was found to be quenched
Various 2-substituted 2,3-dihydro-1H-benz[de]isoquinolin-1-ones were obtained in high yields by chemoselective reduction of 2-substituted 1H-benz[de]isoquinoline-1,3(2H)-diones with sodium or zinc borohydride at room temperature.
Deoxyribonucleic Acid Encoded and Size-Defined π-Stacking of Perylene Diimides
作者:Jeffrey Gorman、Sarah R. E. Orsborne、Akshay Sridhar、Raj Pandya、Peter Budden、Alexander Ohmann、Naitik A. Panjwani、Yun Liu、Jake L. Greenfield、Simon Dowland、Victor Gray、Seán T. J. Ryan、Sara De Ornellas、Afaf H. El-Sagheer、Tom Brown、Jonathan R. Nitschke、Jan Behrends、Ulrich F. Keyser、Akshay Rao、Rosana Collepardo-Guevara、Eugen Stulz、Richard H. Friend、Florian Auras
DOI:10.1021/jacs.1c10241
日期:2022.1.12
molecules. The PDIs are integrated within DNA chains using phosphoramidite coupling chemistry, allowing selection of the DNA sequence to either side, and specification of intermolecular DNA hybridization. In this way, we have developed a “toolbox” for construction of any stacking sequence of these semiconducting molecules. We have discovered that we need to use a full hierarchy of interactions: DNA guides
天然光系统使用蛋白质支架来控制分子间相互作用,从而实现激子流动、电荷生成和长程电荷分离。相比之下,当前有机电子器件(例如OLED和太阳能电池)的结构控制有限。我们在此报告了 π 共轭苝二酰亚胺 (PDI) 的 DNA 编码组装,并对电子耦合分子的数量进行确定性控制。 PDI 使用亚磷酰胺偶联化学集成在 DNA 链中,允许选择任一侧的 DNA 序列,并指定分子间 DNA 杂交。通过这种方式,我们开发了一个“工具箱”,用于构建这些半导体分子的任何堆叠序列。我们发现,我们需要使用完整的相互作用层次:DNA 引导半导体达到指定的紧密接近度,疏水-亲水分化驱动半导体部分的聚集,局部几何结构和静电相互作用定义分子间定位。因此,PDI 堆积以产生大量的分子间 π 波函数重叠,导致单线态激发态从 PDI 单体中的局域激子演变为波函数在五聚体中所有五个 PDI 上离域的准分子。这伴随着主要三重态形成机制的变
Use of 2-(hydroxyalkyl)-1H-benz[de]isoquinoline-1,3(2H)-diones as
申请人:E. R. Squibb & Sons, Inc.
公开号:US04006238A1
公开(公告)日:1977-02-01
Method of treating allergies with a pharmaceutical composition containing as the active ingredient a compound or mixture of compounds of the formula ##STR1## wherein R.sup.1 and R.sup.2 are independently selected from hydrogen, halogen, trifluoromethyl, lower alkyl, lower alkoxy, lower alkylthio, nitro, amino, or cyano; and A is a straight or branched chain alkylene of 1 to 8 carbons.
A series of organoselenocyanate compounds 4a-d were synthesized utilizing 1,8-naphthalic anhydride as the building unit. These compounds were evaluated for their antioxidative activities against DMBA-PMA-induced oxidative stress in a two-stage mouse skin carcinogenic model. Compound 4d was found to have the maximum antioxidative property in comparison with the other compounds. Also, the pretreatment group showed better results than the concomitant treatment groups.(c) 2005 Elsevier Ltd. All rights reserved.