α bromoisobutyryl bromide

Manufactured by Thermo Fisher Scientific

Sourced in United States

α-Bromoisobutyryl bromide is a chemical reagent used in organic synthesis. It is a bifunctional compound containing both a bromoalkyl and an acyl bromide group. This reagent is commonly used in the initiation of atom transfer radical polymerization (ATRP) reactions.

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3 protocols using α bromoisobutyryl bromide

Synthesis of Functionalized Magnetic Nanoparticles

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All reagents were ACS grade or higher, unless specified. Methanol, glycerol and acetonitrile were purchased from MilliporeSigma (Billerica, MA, USA). Triethylamine (TEA); 4-dimethylaminopyridine (DMAP); N,N,N′,N″,N″-pentamethyl diethylenetriamine (PMDETA, 99%); sodium phosphate monobasic (99%); sodium phosphate dibasic (99%) copper (I) chloride; copper (II) chloride and copper(I) bromide (CuCl, CuCl₂ and CuBr 99.999% trace metal basis) were purchased from Sigma-Aldrich (Munich, Germany). α-Bromoisobutyryl bromide (BIB, 98%) was purchased from Alfa-Aesar (Ward Hill, MA, USA). 1,2-epoxy-5-hexene and 2-hydroxyethylmethacrylate (HEMA, >97%, stabilized) was purchased from Acros Organic (98%, Pittsburgh, PA, USA). Bovine serum albumin (BSA, biotechnology grade) and L-(+)-ascorbic acid (AA) were purchased from Amresco (Solon, OH, USA). 2,2′-Bipyridine (Bpy) was purchased from BeanTown Chemical (Hudson, NH, USA). Iron oxide superparamagnetic nanoparticles with a 15-nm core diameter and a 5-nm coating layer functionalized with amine groups were purchased from Ocean Nanotech (San Diego, CA, USA). All water used in this work was obtained from a Thermo Fisher 18 MΩ Barnstead Smart2Pure System (Schwerte, Germany). Commercially available regenerated cellulose membranes with a nominal molecular weight cutoff of 100 kDa were purchased from MilliporeSigma (product codes: PLCHK and PCLMK).

Vu A., Sengupta A., Freeman E., Qian X., Ulbricht M, & Wickramasinghe S.R. (2020). Tailoring and Remotely Switching Performance of Ultrafiltration Membranes by Magnetically Responsive Polymer Chains. Membranes, 10(9), 219.

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Surface Functionalization for Biomolecular Imaging

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Dry toluene, dry dichloromethane (DCM), α-bromoisobutyryl bromide (BIBB), copper(ii)bromide, N,N,N′,N′′,N′′-pentamethyldiethylenetriamine (PMTDA) and tin(ii) 2-ethylhexanoate were purchased from Alfa Aesar. Styrene, ethyl-α-bromoisobutyrate (EBIB), triethylamine (TEA) dimethylformamide (DMF) and aminopropyltrimethoxysilane (APTMS) were obtained from Sigma Aldrich. N-Aminoethyl-aza-2,2-dimethyl-4-methylsilacyclopentane (thereafter referred to as cycloazasilane) and 2,2-dimethoxy-1-thia-2-silacyclopentane (thereafter referred to as cyclothiasilane) were purchased from Gelest. The fluorescent dyes ATTO 647 NHS and ATTO 655 maleimide were obtained from ATTO-TEC GmbH, Germany. Dibenzocyclooctyne-(polyethyleneglycol-12)-N-hydroxysuccinimidyl ester (NHS-PEG12-DBCO) was purchased from Click Chemistry Tools, USA. Azido-HaloTag-Ligand (click-HTL) was synthesized as described previously.^{31 (link)} The IUPAC name of click-HTL is 3-(4-azidophenyl)-N-(2-(2-(6-chlorohexyloxy)ethoxy)ethyl)propanamide. HaloTag-fused monomeric enhanced GFP protein (HaloTag-mEGFP) and poly(l-lysine)-graft-poly(ethylene glycol) terminated with methoxy groups (PLL-PEG-OMe) were prepared according protocols described previously.^{32,33 (link)} Chemicals for preparing HEPES buffered saline (HBS), such as 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid and NaCl were purchased from Sigma Aldrich.

Philippi M., You C., Richter C.P., Schmidt M., Thien J., Liße D., Wollschläger J., Piehler J, & Steinhart M. (2019). Close-packed silane nanodot arrays by capillary nanostamping coupled with heterocyclic silane ring opening. RSC Advances, 9(43), 24742-24750.

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Synthesis of N-Isopropylacrylamide Polymer

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All reagents were ACS grade unless otherwise specified. Acetonitrile and m ethanol were purchased from EMD Millipore, Billerica, MA, USA, while ethanol was purchased from VWR International, Radnor, PA, USA. N-Isopropylacrylamide (>98%) was purchased from TCI America, Boston, MA, USA. α-Bromoisobutyryl bromide (98%) was purchased from Alfa–Aesar, Ward Hill, MA, USA. Triethylamine, 4-dimethylaminopyridine, N,N,N’,N”,N”-pentamethyl diethylenetriamine (99% (PMDETA)), sodium chloride, CuBr, and CuBr₂ were purchased from Sigma–Aldrich, Munich, Germany. The deionized water used throughout the investigation was obtained from a Thermo Fisher 18 MΩ Barnstead Smart2Pure system, Schwerte, Germany. The NF 270 membranes were provided by Dow Filmtec, Edina, MN, USA. The membranes were cut into 25 mm discs.

Vu A., Mark N.S., Ramon G.Z., Qian X., Sengupta A, & Wickramasinghe S.R. (2019). Oil Deposition on Polymer Brush-Coated NF Membranes. Membranes, 9(12), 168.

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