Synthesis and characterization of new photoswitchable azobenzene-containing poly( -caprolactones)

A novel and efficient strategy in obtaining series of mono- and bi-armed azobenzene-containing poly( -caprolactone)s is described, starting from a commercially available azobenzene dye via azide/alkyne-"click"-reactions. The attachment of alkyne-telechelic poly( -caprolactone)s (1 kDa and...

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Published in:RSC advances 2016-01, Vol.6 (8), p.6358-6367
Main Authors: Appiah, Clement, Siefermann, Katrin R, Jorewitz, Marcel, Barqawi, Haitham, Binder, Wolfgang H
Format: Article
Language:English
Subjects:
Alkynes
Attachment
Chromatography
Dyes
Joining
Polymers
Strategy
Synthesis
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creator Appiah, Clement
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description A novel and efficient strategy in obtaining series of mono- and bi-armed azobenzene-containing poly( -caprolactone)s is described, starting from a commercially available azobenzene dye via azide/alkyne-"click"-reactions. The attachment of alkyne-telechelic poly( -caprolactone)s (1 kDa and 3 kDa), followed by chromatographic separation, allowed the attachment of either one or two PCl-chains to either side of the azobenzene-dye. The resulting mono- and bi-armed photo-switchable polymers are fully characterized by 2D-NMR techniques and show a high thermal stability. Additionally liquid chromatography at critical conditions (LCCC) coupled to ESI-TOF allowed us to prove the presence of either one or two polymer chains affixed onto the central azobenzene dye. A novel and efficient strategy in obtaining mono- and bi-armed azobenzene-containing poly( -caprolactone)s is described, starting from a commercially available azobenzene dye.
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source Royal Society of Chemistry (RSC) Journals
subjects Alkynes
Attachment
Chromatography
Dyes
Joining
Polymers
Strategy
Synthesis
title Synthesis and characterization of new photoswitchable azobenzene-containing poly( -caprolactones)
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