Direct modification of hydrogen/deuterium-terminated diamond particles with polymers to form reversed and strong cation exchange solid phase extraction sorbents.
We describe direct polymer attachment to hydrogen and deuterium-terminated diamond (HTD and DTD) surfaces using a radical initiator (di-tert-amyl peroxide, DTAP), a reactive monomer (styrene) and a crosslinking agent (divinylbenzene, DVB) to create polystyrene encapsulated diamond. Chemisorbed polystyrene is sulfonated with sulfuric acid in acetic acid. Surface changes were followed by X-ray photoelectron spectroscopy (XPS), time-of-flight secondary ion mass spectrometry (ToF-SIMS) and diffuse reflectance Fourier transform infrared spectroscopy (DRIFT). Finally, both polystyrene-modified DTD and sulfonated styrene-modified DTD were used in solid phase extraction (SPE). Percent recovery and column capacity were investigated for both phenyl (polystyrene) and sulfonic acid treated polystyrene SPE columns. These diamond-based SPE supports are stable under basic conditions, which is not the case for silica-based SPE supports.
Department of Chemistry and Biochemistry, Brigham Young University, C100 BNSN, Provo, UT 84602, USA.
Li
L
Yang
David S
DS
Jensen
Michael A
MA
Vail
Andrew
A
Dadson
Matthew R
MR
Linford
D015057:1-Naphthylamine / Q000737:chemistry; D000327:Adsorption; D002411:Cation Exchange Resins / Q000737:chemistry*; D002852:Chromatography, Ion Exchange; D003432:Cross-Linking Reagents; D003903:Deuterium / Q000737:chemistry*; D018130:Diamond / Q000737:chemistry*; D006859:Hydrogen / Q000737:chemistry; D010545:Peroxides / Q000737:chemistry; D056951:Photoelectron Spectroscopy; D011137:Polystyrenes / Q000737:chemistry*; D052616:Solid Phase Extraction / Q000379:methods*; D021241:Spectrometry, Mass, Electrospray Ionization; D013451:Sulfonic Acids / Q000737:chemistry; D013499:Surface Properties; D014753:Vinyl Compounds / Q000737:chemistry
D002411:Cation Exchange Resins; D003432:Cross-Linking Reagents; D010545:Peroxides; D011137:Polystyrenes; D013451:Sulfonic Acids; D014753:Vinyl Compounds; D018130:Diamond; D006859:Hydrogen; D015057:1-Naphthylamine; D003903:Deuterium; C004985:divinyl benzene