Complexes between hydrogen bonded bisporphyrin tweezers and cholesterol-appended fullerenes as organogelators and liquid crystals
作者:Ze-Yun Xiao、Jun-Li Hou、Xi-Kui Jiang、Zhan-Ting Li、Zhi Ma
DOI:10.1016/j.tet.2009.09.107
日期:2009.12
This paper reports the gelation and liquid crystal properties of a class of new complexes between zinc and copper bisporphyrin and C-60 derivatives. The bisporphyrins are induced by intramolecular hydrogen bonding to adopt a preorganized V-shaped conformation and therefore efficiently complex the C-60 derivatives. As a result, the capacity of their mixtures to gelate alkanes is increased notably. The bisporphyrins themselves and their complexes with the C-60 derivatives form the smectic liquid crystal phase. However, the glassy transition temperature of the complexes decreases considerably. (C) 2009 Elsevier Ltd. All rights reserved.
Chemical Surface Modification via Radical C−C Bond-Forming Reactions
作者:Kai Oliver Siegenthaler、Andreas Schäfer、Armido Studer
DOI:10.1021/ja0686716
日期:2007.5.1
Radical C−C bond-forming reactions at self-assembled monolayers (SAMs) can be used for the modification of alkene terminated Si wafers under neutral conditions. Many functional groups are tolerated under radical conditions and biologically interesting molecules such as biotin can be immobilized via this approach.
自组装单层 (SAM) 上的自由基 C-C 键形成反应可用于在中性条件下改性烯烃封端的 Si 晶片。许多官能团在自由基条件下是可以耐受的,并且可以通过这种方法固定生物素等生物学感兴趣的分子。