Wavelength-Orthogonal Stiffening of Hydrogel Networks with Visible Light

Truong VX, Bachmann J, Unterreiner AN, Blinco JP, Barner-Kowollik C (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Angewandte Chemie International Edition Wiley

Book Volume: 61

Article Number: e202113076

Journal Issue: 15

DOI: 10.1002/anie.202113076

Abstract

Herein, we introduce the wavelength-orthogonal crosslinking of hydrogel networks using two red-shifted chromophores, i.e. acrylpyerene (AP, λactivation=410–490 nm) and styrylpyrido[2,3-b]pyrazine (SPP, λactivation=400–550 nm), able to undergo [2+2] photocycloaddition in the visible-light regime. The photoreactivity of the SPP moiety is pH-dependent, whereby an acidic environment inhibits the cycloaddition. By employing a spiropyran-based photoacid generator with suitable absorption wavelength, we are able to restrict the activation wavelength of the SPP moiety to the green light region (λactivation=520–550 nm), enabling wavelength-orthogonal activation of the AP group. Our wavelength-orthogonal photochemical system was successfully applied in the design of hydrogels whose stiffness can be tuned independently by either green or blue light.

Involved external institutions

Queensland University of Technology (QUT)

Australia (AU) Karlsruhe Institute of Technology (KIT)

Germany (DE)

How to cite

APA:

Truong, V.X., Bachmann, J., Unterreiner, A.-N., Blinco, J.P., & Barner-Kowollik, C. (2022). Wavelength-Orthogonal Stiffening of Hydrogel Networks with Visible Light. Angewandte Chemie International Edition, 61(15). https://dx.doi.org/10.1002/anie.202113076

MLA:

Truong, Vinh X., et al. "Wavelength-Orthogonal Stiffening of Hydrogel Networks with Visible Light." Angewandte Chemie International Edition 61.15 (2022).

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