Trityl chloride

L-lactide (449210000, Acros Organics, Geel, Belgium), ε-caprolactone (802801 Merck, Darmstadt, Germany), cellulose (435236, Merck, Darmstadt, Germany), lithium chloride (62480, Sigma Aldrich, Steinheim, Germany), trityl chloride (93000, Sigma Aldrich, Steinheim, Germany), pyridine (270970, Sigma Aldrich, Steinheim, Germany), N,N-dimethylacetamide (DMAc, 803235, Merck, Darmstadt, Germany), tetrahydrofuran (THF, 401757, Sigma Aldrich, Steinheim, Germany), toluene (601-021-00-3, VWR, Darmstadt, Germany), sodium hydride (814552, Merck, Darmstadt, Germany) tin(II) 2-ethylhexanoate (Sn(Oct)₂, AB106427, ABCR, Karlsruhe, Germany) were used in the experiments as received unless otherwise stated. THF and toluene were distilled under inert gas using standard Schlenk techniques and stored over molecular sieves (4 Å) before use. Sn(Oct)₂ and ε-caprolactone were distilled under reduced pressure in accordance with the procedure reported by Lee et al. [36 (link)], and stored under argon atmosphere.

Hydroxymethyl EDOT (EDOT-OH, 95%), sodium hydride (NaH, 60% dispersion in mineral oil), trityl chloride (97%), magnesium sulfate (MgSO₄), potassium carbonate (K₂CO₃), triphenylphosphine (PPh₃), Amberlite IR-120 resin, sodium methoxide (NaOMe), iron(III) p-toluenesulfonate hexahydrate (technical grade), imidazole (IM, 99%), dimethyl sulfoxide (DMSO), (3-glycidoxypropyl)trimethoxysilane (GOPS, ≥98%), hydrogen tetrachloroaurate(III) hydrate (HAuCl₄), trisodium citrate dihydrate (TSC, 99%), DA, AA, UA, and PC were purchased from Sigma–Aldrich. The aqueous PEDOT:PSS solution (Clevios PH1000, PEDOT:PSS ratio = 1:2.5) was purchased from Heraeus with a solid concentration 1.0–1.3 wt%. Tetrahydrofuran (THF), ethyl acetate (EA), hexane, acetone, carbon tetrabromide (CBr₄), potassium thioacetate (KSAc), hydrochloric acid (HCl, 37%), and nitric acid (HNO₃, 70%) were purchased from Acros Organics. All materials and reagents were used as received without further purification. The aqueous solutions were prepared with deionized (DI) water from a Millipore Milli-Q water treatment system (18.2 MΩ cm⁻¹).

All solvents were purchased in the highest available quality required for their application in this study. The reactions requiring anhydrous conditions were carried out under argon atmosphere using anhydrous solvents treated with activated molecular sieves for at least 24 h. molecular sieves (4Å and 3Å) were purchased from Alfa Aesar (Karlsruhe, Germany) and heat-activated under vacuum before use. Triethylamine, trityl chloride, toluene-sulfonyl chloride, NaHCO₃, Na₂SO₄, 1,4-butanediol, P₂O₅, sodium hydride, n-butyllithium (1.6 M solution in hexane), (3-bromopropoxy)-tert-butyldimethylsilane, (4) and ethylene oxide (2.9–3.1 M solution in THF) were purchased from Sigma Aldrich (Steinheim, Germany). Cobalt bis(1,2-dicarbollide) was purchased from Katchem Ltd., Prague, Czech Republic.