Journal Title
Title of Journal: Monatsh Chem
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Abbravation: Monatshefte für Chemie - Chemical Monthly
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Publisher
Springer Vienna
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Authors: Isolde Kuchler Fritz Pittner Gisela Pittner Gerhard Sontag
Publish Date: 2010/02/13
Volume: 141, Issue: 2, Pages: 131-135
Abstract
A copolymer of Nvinylimidazole and Nvinyl2pyrrolidone photocrosslinked with sulfonated diazidostilbenes showed swelling/shrinking behaviour due to interaction with divalent metal ions such as Mn2+ Zn2+ Ni2+ and Co2+ This effect was used to set up a resonance enhanced absorption chip a solution of the copolymer in methanol stabilized with the radical scavenger 26ditbutyl4methylphenol was spincoated onto a silanized aluminum chip and then sputtered with gold nanoparticles The change in layer thickness caused by the interaction of ions with the copolymer interlayer resulted in a shift of the maxima of the reflection spectrum to lower wavelengths and thus also a visible colour change This spectral shift was logarithmically related to the concentration of metal ions Mn2+ turned out to react more rapidly and was detected with 100fold greater sensitivity than the other investigated ions
Keywords:
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