Chlorodimethylsilane c2h7clsi

Type A gelatin from pigskin was purchased from China National Pharmaceutical Group Corporation (Beijing, China) and used after dialysis. The isoelectric point (pI, 8.5) of the dialyzed gelatin after complete deionization was determined by fluorescence spectroscopy. Sodium dodecyl sulfate (SDS) was purchased from Alfa Aesar and recrystallized from ethanol before use. Ally glycidyl ether (AGE) and chloroplatinic acid hexahydrate (H₂Pt₆Cl₆•6H₂O) were obtained from Alfa Aesar. Hexamethylcyclotrisiloxane (D3, >95%), n–butyllithium (C₄H₉Li, >99%), and chlorodimethylsilane (C₂H₇ClSi, >99%) were purchased from Sigma–Aldrich (St. Louis, MO, USA). Benzene, deionized water (conductivity = 2.06 µS cm⁻¹, dielectric constant ε = 80.40), methanol (ε = 32.70), ethanol (ε = 24.50), isopropanol alcohol (ε = 17.90), acetone (ε = 20.70), tetrahydrofuran (THF, ε = 7.58), and 1,4-dioxane (ε = 2.25) solvents (China National Pharmaceutical Group Corporation) were all of analytical reagent (AR) grade and strictly dehydrated before use.

Gelatin (type B, isolated from bovine skin, isoelectric point: 5, Bloom strength: 257), was purchased from China National Medicines Corporation Ltd. and used without further purification or treatment. Methacrylic anhydride (MAA) was obtained from Aladdin Inc. Dialysis membranes (molecular weight cutoff of 10,000 Da) were procured from the US. 1-[4-(2-Hydroxyethoxy)-phenyl]-2-hydroxy-2-methyl-1-propane-1-one (Irgacure^® 2959), sodium dodecyl sulfate (SDS), ally glycidyl ether (AGE) and H₂Pt₆Cl₆ catalysis were supplied from Alfa Aesar. Hexamethylcyclotrisiloxane (D3, >95%), n-butyllithium (C₄H₉Li, 99+%), chlorodimethylsilane (C₂H₇ClSi, 99+%) were purchased from Sigma-Aldrich. D3 was put in a flask, diluted with an equal volume of purified benzene, and stirred over CaH₂. The solvent was distilled and the monomer was sublimed into a flask [38 (link)]. Benzene (GR), tetrahydrofuran (THF, GR), ethanol (AR), and acetone (AR) were purchased from Sigma-Aldrich and were dehydrated strictly before used.