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. Author manuscript; available in PMC: 2017 Dec 12.
Published in final edited form as: Biomacromolecules. 2016 Nov 11;17(12):3872–3882. doi: 10.1021/acs.biomac.6b00931

Figure 1. Visible light initiated thiol-norbornene reaction for forming orthogonally crosslinked biomimetic hydrogels.

Figure 1

(A) Schematic of thiol-norbornene reaction under visible light exposure and with eosin-Y as the only initiator. (B) Chemical structures of macromers used, including thiolated PVA (TPVA, 6kDa), PEG-di-norbornene (PEGdNB, 10kDa), PEG-tetra-thiol (PEG4SH, 10kDa), gelatin-norbornene (GelNB), and thiolated HA (THA, 250kDa). (C-E) Evolution of storage (G′) and loss (G′) modulus of visible light initiated bio-inert (C), bioactive (D), and biomimetic (E) thiol-norbornene gelation.