Dimethyl formamide

All commercial chemicals and solvents were reagent grade and were used without further purification unless otherwise noted. Reactions were carried out with the use of standard techniques for the exclusion of moisture. Ethanol (96%, purissium grade pur, Xilab), dichloromethane (96%, purissium grade pur, Xilab) and dimethyl formamide (99.8%, Panreac) were degassed before use. Tetrahydrofuran (J.T. Baker) diethyl ether anhydrous (J.T. Baker), N,N,N',N'',N''-pentamethyldiethylenetriamine (PMDETA, 99%, Aldrich), Na₂SO₄ (99%, Alfa Aesar), norbornene (NB, 99% GC, Aldrich), Grubbs first generation catalyst Cl₂(PCy₃)₂Ru=CHPh (Aldrich, stored in a glovebox under Argon atmosphere), dodecane (99%, Aldrich), triethylamine (99%, Acros Organics), ethyl vinyl ether (99% stab. with ca. 0.1% N,N-diethylalanine, Alfa Aesar), Trizma®base (99.9%, Aldrich) were used without further purification. CuBr (98%, Aldrich) was purified in acetic acid and stored under inert atmosphere (glovebox), α-norbornenyl-ω-azide-poly(ethylene oxide) macromonomer 6 bare nanoparticles 1033 and Rhodamine B labeled nanoparticles 11 26 (link) were prepared as previously described. ACN: acetonitrile, DCM: dichloromethane, DMF: dimethyl formamide, EA: ethyl acetate, TEA: trimethylamine, THF: tetrahydrofuran, PE: petroleum ether. PMDETA= pentamethyldiethylenetetramine.