Literature DB >> 16478172

Contrast viscosity changes upon photoirradiation for mixtures of poly(acrylic acid)-based alpha-cyclodextrin and azobenzene polymers.

Itsuro Tomatsu1, Akihito Hashidzume, Akira Harada.   

Abstract

Polymer-polymer interactions were investigated for mixtures of a poly(acrylic acid) (pAA) carrying azobenzene (pC12Azo) and two kinds of pAA carrying alpha-cyclodextrin (CD), in which CDs are attached to the main chain through the 3- and 6-positions in CD (p3alphaCD and p6alphaCD, respectively), using several techniques, such as viscosity and NMR measurements. Viscosity data exhibited contrast changes upon UV irradiation: thinning (p3alphaCD/pC12Azo) and thickening (p6alphaCD/pC12Azo). NOESY spectra confirmed that the contrast viscosity changes were ascribable to differences in how CD moieties interact with pC12Azo after photoisomerization of azobenzene moieties from trans to cis: dissociation of inclusion complexes (p3alphaCD/pC12Azo) and formation of interlocked complexes (p6alphaCD/pC12Azo).

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Year:  2006        PMID： 16478172     DOI： 10.1021/ja058345a

Source DB:  PubMed          Journal:  J Am Chem Soc        ISSN： 0002-7863            Impact factor:   15.419


  18 in total

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2.  Interaction of cyclodextrins with pyrene-modified polyacrylamide in a mixed solvent of water and dimethyl sulfoxide as studied by steady-state fluorescence.

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4.  Redox-responsive self-healing materials formed from host-guest polymers.

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Journal:  Nat Commun       Date:  2011-10-25       Impact factor: 14.919

5.  Photoswitchable gel assembly based on molecular recognition.

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Journal:  Nat Commun       Date:  2012-01-03       Impact factor: 14.919

Review 6.  Chemically Modified Biopolymers for the Formation of Biomedical Hydrogels.

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7.  Host-guest-driven color change in water: influence of cyclodextrin on the structure of a copper complex of poly((4-hydroxy-3-(pyridin-3-yldiazenyl)phenethyl)methacrylamide-co-dimethylacrylamide).

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Journal:  Beilstein J Org Chem       Date:  2014-10-24       Impact factor: 2.883

8.  Enhanced User-Control of Small Molecule Drug Release from a Poly(ethylene glycol) Hydrogel via Azobenzene/Cyclodextrin Complex Tethers.

Authors:  E M Nehls; A M Rosales; K S Anseth
Journal:  J Mater Chem B       Date:  2016-01-12       Impact factor: 6.331

9.  Cyclodextrin-induced host-guest effects of classically prepared poly(NIPAM) bearing azo-dye end groups.

Authors:  Gero Maatz; Arkadius Maciollek; Helmut Ritter
Journal:  Beilstein J Org Chem       Date:  2012-11-14       Impact factor: 2.883

10.  Reversible phase transfer of nanoparticles based on photoswitchable host-guest chemistry.

Authors:  Lu Peng; Mingxu You; Cuichen Wu; Da Han; Ismail Öçsoy; Tao Chen; Zhuo Chen; Weihong Tan
Journal:  ACS Nano       Date:  2014-02-19       Impact factor: 15.881
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