1 4 butanediol bis thioglycolate dithiol dt

The photobase generator (PBG) 2-(9-oxoxanthen-2-yl)propionic acid 1,5,7-triazabicyclo[4.4.0]dec-5-ene salt and 1,4-butanediol bis(thioglycolate) (dithiol, DT) were purchased from TCI Chemicals. Poly(ethylene glycol) diacrylate (PEGDA, M_n = 700 g mol⁻¹), trimethylolpropane tris(3-mercoptopropianate) (trithiol, TT), triethylamine, 1-ethyl-3-methylimidazolium trifluoromethanesulfonate (EMIM Triflate), and sodium bicarbonate (NaHCO₃) were purchased from Sigma–Aldrich. 4-Bromobenzenesulfonyl chloride was purchased from Alfa Aesar. Magnesium sulfate heptahydrate (MgSO₄·7H₂O) was obtained from Acros Organics. 1-Ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMIM TFSI) was purchased from Solvionic. Finally, hydrochloric acid 37% (HCl) and dichloromethane (DCM) were obtained from VMR Chemicals.

The copolymer of poly(epichlorohydrin) and
PEO (Hydrin C2000XL, Mw = 8.7 × 10⁶ g·mol^–1) is obtained from Zeon chemicals (¹H NMR
spectrum in Figure S1). Benzene-1,4-diboronic
acid was purchased from Apollo Scientific. Lithium bis(trifluoromethanesulfonyl)imide
(LiTFSI) was purchased from Solvionic. 1,4-Butanediol bis(thioglycolate)
(dithiol, DT) and heptane were purchased from TCI Chemicals. Darocur
1173 (2-Hydroxy-2-methylpropiophenone), 1-thioglycerol, PEG methyl
ether thiol (PEGSH) with an average Mn of 800 g·mol^–1, and 1-decanethiol 99% (C₁₀SH) were purchased from Sigma-Aldrich.
Finally, dimethylformamide (DMF), 1-allylimidazole, and magnesium
sulfate heptahydrate (MgSO₄·7H₂O) were
purchased from Acros-Organics. Dichloromethane (DCM) was acquired
from VWR Chemicals.
All chemicals were used as received without
further purification.