Increasing the Open Circuit Voltage of Bulk-Heterojunction Solar Cells by Raising the LUMO Level of the Acceptor
作者:Floris B. Kooistra、Joop Knol、Fredrik Kastenberg、Lacramioara M. Popescu、Wiljan J. H. Verhees、Jan M. Kroon、Jan C. Hummelen
DOI:10.1021/ol062666p
日期:2007.2.1
We report the synthesis, characterization, and electrochemical properties of ten new fullerene derivatives for usage in organic solar cells. The phenyl ring of PCBM was substituted with electron-donating and electron-withdrawing substituents to study their influence on the LUMO level of the parentfullerene. We varied the LUMO level over a range of 86 mV and show a small but significant change of the
Combretastatin Analogs with Tubulin Binding Activity
申请人:PINNEY Kevin G.
公开号:US20090075943A1
公开(公告)日:2009-03-19
Analogs of combretastatin have been discovered which demonstrate impressive cytotoxicity as well as a remarkable ability to inhibit tubulin polymerization. Such compounds are excellent clinical candidates for the treatment of cancer in humans. In addition, certain of these ligands, as pro-drugs, may well prove to be tumor selective vascular targeting chemotherapeutic agents or to have vascular targeting activity resulting in the selective prevention and/or destruction of nonmalignant proliferating vasculature.
The invention provides novel benzindole derivatives, processes for producing them, as well as a neuroprotective agent, an agent to prevent or treat diseases involving the degeneration, retraction or death of neurons, and an analgesic, each containing the benzindole derivatives as an active ingredient.
Synthesis of diverse analogues of Oenostacin and their antibacterial activities☆
作者:Vandana Srivastava、Mahendra P. Darokar、Atiya Fatima、J.K. Kumar、Chinmay Chowdhury、Hari Om Saxena、Gaurav R. Dwivedi、Kunal Shrivastava、Vivek Gupta、S.K. Chattopadhyay
DOI:10.1016/j.bmc.2006.09.034
日期:2007.1.1
Several diverse analogues of Oenostacin, a naturally occurring potent antibacterial phenolic acid derivative, have been synthesized. A small library with more than forty analogues having different aromatic rings and varied side chains has been achieved through solution phase synthesis. Some of these analogues, that is, 22, 23 and 42, possessed potent antibacterial activities against Staphylococcus epidermidis and Staphylococcus aureus having EC50 ranging from 0.49 to 0.67 mu M as compared to Oenostacin (EC50 = 0.12 mu M). (c) 2006 Elsevier Ltd. All rights reserved.
810. Syntheses in the colchicine series. Part I. Products from the stobbe condensation of methyl γ-(2 : 3 : 4-trimethoxybenzoyl)butyrate with dimethyl succinate