Synthesis and Ionochromic Effect of Hyperbranched and Linear Poly(thienylene−phenylene)s

A novel hyperbranched poly(thienylene−phenylene) is synthesized, which is compared with a poly(2,3-thienylene−phenylene) and a poly(2,5-thienylene−phenylene). The hyperbranched polymer has much greater solubility in organic solvents than its isomeric linear polymers. A pronounced ionochromic effect...

Full description

Saved in:
Bibliographic Details
Published in:Macromolecules 2003-04, Vol.36 (8), p.2689-2694
Main Authors: Xu, Ming-Hua, Zhang, Hui-Chang, Pu, Lin
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Polymers with particular properties
Preparation, kinetics, thermodynamics, mechanism and catalysts
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A novel hyperbranched poly(thienylene−phenylene) is synthesized, which is compared with a poly(2,3-thienylene−phenylene) and a poly(2,5-thienylene−phenylene). The hyperbranched polymer has much greater solubility in organic solvents than its isomeric linear polymers. A pronounced ionochromic effect is observed for the poly(2,5-thienylene−phenylene) in the presence of LiBF4. This polymer shows a large red shift in its UV−vis spectrum when treated with the metal salt solution. The ionochromic effect is also ion selective. However, both the hyperbranched polymer and the poly(2,3-thienylene−phenylene) show almost no such ionochromic effect probably because of the ortho-substituted thiophene units in their structure. The hyperbranched polymer and the poly(2,5-thienylene−phenylene) are found to be green light emitters and the poly(2,3-thienylene−phenylene) a blue light emitter. These materials are potentially useful for electroluminescence and photovoltaics.
ISSN:0024-9297
1520-5835
DOI:10.1021/ma025650x