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The formation of a slipped cofacial dimer of zinc (II) tripyridylporphyrin in water-soluble polymer

Paper ID Volume ID Publish Year Pages File Format Full-Text
27349 44017 2011 6 PDF Available
Title
The formation of a slipped cofacial dimer of zinc (II) tripyridylporphyrin in water-soluble polymer
Abstract

A novel tripyridylporphyrin monomer, 5-[4-[2-(acryloyloxy)ethoxy]phenyl]-10,15,20-tris(4-pyridyl)porphyrin (TrPyP), and its zinc (II) complex (ZnTrPyP) were synthesized. It was copolymerized with acrylamide to prepare water-soluble polymer P(ZnTrPyP-AM). The aggregation behavior of P(ZnTrPyP-AM) in aqueous solution was investigated by UV–visible absorption spectra. The red shift of Q band and the significantly enhanced relative intensity (ɛα/ɛβ) indicated that the ZnTrPyP was axially coordinated. Meanwhile, Soret band of porphyrin split into two bands, suggesting exciton coupling of aggregates. The porphyrin pendants of P(ZnTrPyP-AM) were supposed to form a slipped cofacial dimer and the macromolecular matrix helped to create the well-defined porphyrin aggregates. This finding was helpful for the assembly of artificial light-harvesting systems in aquatic environment to mimic the dimeric structure in natural LHC.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► We prepared zinc tripyridylporphyrin monomer and its water-soluble copolymers. ► Soret band of porphyrin pendants splits in copolymer with acrylamide. ► The porphyrin pendants form a slipped cofacial dimer in water. ► The porphyrin dimers dissociate with the addition of pyridine. ► The dimers formed in water-soluble polymer help to mimic the natural LHC.

Keywords
Self-aggregation; Zinc tripyridylporphyrin; Water-soluble polymer; Exciton coupling; Slipped cofacial dimer
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The formation of a slipped cofacial dimer of zinc (II) tripyridylporphyrin in water-soluble polymer
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 220, Issue 1, 30 April 2011, Pages 64–69
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us