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.