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. Author manuscript; available in PMC: 2018 Nov 12.
Published in final edited form as: Biomacromolecules. 2017 Feb 1;18(2):562–567. doi: 10.1021/acs.biomac.6b01715

Figure 4. Sensitivity towards intermediate pH by tin-porphyrin-PEG hydrogels.

Figure 4.

Fluorescence emission (normalized to initial emission after formation) of tin porphyrin-PEG hydrogels placed in 100 mM sodium phosphate solutions of A) pH=4, 7, and 10. B) pH=5 and 9, and C) pH=6 and 8. D) Fluorescence emission (normalized to initial emission after formation) of tin porphyrin-PEG hydrogels placed in pH=6.5 and 7.4 PBS buffer. Data show mean +/− std. dev. for n=3 separate polymerization reactions.