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. Author manuscript; available in PMC: 2018 Oct 30.
Published in final edited form as: Chem Soc Rev. 2017 Oct 30;46(21):6532–6552. doi: 10.1039/c7cs00445a

Table 1.

Examples of photochemical reactions to form and functionalize hydrogel matrices for biomaterial applications

Reaction Example Reference light control Section
Chain photopolymerization graphic file with name nihms903554t1.jpg Many, see 62 Photoinitation 2
Thiol-Michael graphic file with name nihms903554t2.jpg 63–65 Photocaged thiol66 or photogenerated base67 6
Thiol-ene graphic file with name nihms903554t3.jpg 63,68,69 Photoinitation70,71 3
Thiol-yne graphic file with name nihms903554t4.jpg 72,73 Photoinitation72–74 3
Enzymatic crosslinking graphic file with name nihms903554t5.jpg 75,76 Photocaged peptide substrate77,78 6
Diels alder: Normal graphic file with name nihms903554t6.jpg 79,80 Photoenol reactions81 7
 Inverse electron demand graphic file with name nihms903554t7.jpg 82–84 Oxidation of dihydrogen tetrazine85 7
1,3-dipolar cycloadditions graphic file with name nihms903554t8.jpg 86–88 Photodeprotection of cyclooctyne,89 photoreduction of Cu(II),90 tetrazole-alkene91 7
Imine bond formation graphic file with name nihms903554t9.jpg 92,93 Photocaged alkoxyamine,94–96 photogenerated aldehyde97–99 6
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