Complexes between hydrogen bonded bisporphyrin tweezers and cholesterol-appended fullerenes as organogelators and liquid crystals
摘要:
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.
Complexes between hydrogen bonded bisporphyrin tweezers and cholesterol-appended fullerenes as organogelators and liquid crystals
摘要:
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.