Supramolecular structures and method for forming the same
申请人:Lin King-Fu
公开号:US20070120113A1
公开(公告)日:2007-05-31
A primary supramolecular structure is described. The primary supramolecular structure has a shape of ring-like disk. The shape of ring-like disk has a diameter of about 10 nanometers to about 60 nanometers. The mentioned primary supramolecular structure is formed by self-assembly of amphiphilic conjugate molecules. Moreover, a secondary supramolecular structure is described. The secondary supramolecular structure has a shape of ring-like disk. The shape of ring-like disk has a diameter of about 100 nanometers to about 300 nanometers. The mentioned secondary supramolecular structure is formed by self-assembly of amphiphilic conjugate molecules hybrid with metal alkoxides or non-metal alkoxides.
Molecular aggregations and supramolecular architectures of amphiphilic PEO17–OPV3 and its hybrid with silica
作者:Chi-Chun Hsieh、King-Fu Lin
DOI:10.1039/b503393d
日期:——
The synthesis, luminescence properties and self-assembly of a specifically-designed amphiphilic PEO17âOPV3 molecule (and its hybrid with silicates) to form ring-like disks are described. The synthesis was begun with the WittigâHorner reaction to form a co-planar Ï-conjugated PPV oligomer segment, followed by linking with PEO17 through a sulfonate group that causes a twist in the molecule between the hydrophobic and hydrophilic segments. Due to its amphiphilic nature, its photoluminescence behavior is greatly affected by the solvent type and concentration. The deposition of PEO17âOPV3 molecules on mica with a proper co-solvent was able to form a ring-like supramolecular architecture of ca. 30 nm in diameter as observed by atomic force microscopy (AFM). The width of the enclosed peripheral area on both sides of the ring is on the same order of magnitude as the length of the PEO17âOPV3 molecule. The self-assembly of a PEO17âOPV3 hybrid with silica to form a ring-like disk of ca. 150 nm diameter and ca. 0.65 nm thickness was also observed. The latter is roughly equal to the width of rod segment, implying that ÏâÏ stacking governs the self-assembly process in the co-organization between PEO17âOPV3 molecules and silicates, whereas the twist in molecules orients the ring formation. As a result, a multi-lamellar phase transformation mechanism is proposed for the formation of such a supramolecular architecture.