Issue 6, 2014

Tuning chelating groups and comonomers in spiropyran-containing copolymer thin films for color-specific metal ion binding

Abstract

Photochromic molecules can be used to selectively bind divalent metal ions. In order to study the influence of increased chelation in spiropyran-containing copolymers, we synthesized two derivatives: spiropyran methacrylate (SPMA) and spiropyran methacrylate with a methoxy substituent in the 8′ position of the benzopyran ring (MEO). Additionally, the comonomer with which spiropyran was polymerized is also varied between methyl methacrylate (MMA) and 2,2,2-trifluoroethyl methacrylate (TFEMA) to tune the colorimetric response. Fourier transform-infrared (FT-IR) spectroscopy was used to characterize the photoinduced conversion of spiropyran to merocyanine, as well as the merocyanine–metal ion (MC–M2+) interaction. By means of UV-Vis absorption spectroscopy, we demonstrate that each metal ion gives rise to a unique colorimetric response for the various spiropyran-containing copolymers studied.

Graphical abstract: Tuning chelating groups and comonomers in spiropyran-containing copolymer thin films for color-specific metal ion binding

Supplementary files

Article information

Article type
Paper
Submitted
17 Sep 2013
Accepted
20 Dec 2013
First published
20 Dec 2013

Polym. Chem., 2014,5, 2094-2102

Tuning chelating groups and comonomers in spiropyran-containing copolymer thin films for color-specific metal ion binding

Kristen. H. Fries, G. R. Sheppard, J. A. Bilbrey and J. Locklin, Polym. Chem., 2014, 5, 2094 DOI: 10.1039/C3PY01296D

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