Properties of microdispersed sintered nanodiamonds as a stationary phase for normal-phase high performance liquid chromatography

Improved efficiency of reversed-phase carbon/nanodiamond/polymer core-shell particles for HPLC using carbonized poly(divinylbenzene) microspheres as the core materials

“…We previously observed that PAAm may be largely deprotonated under our deposition conditions , and nanodiamond is a complex material. Indeed, studies of nanodiamond have suggested multiple types of oxidized carbon exist at its surface . Thus, nanodiamond deposition on PAAm, and the reverse process of PAAm deposition on nanodiamond, may be the result of (i) electrostatic interactions between carboxylates at the nanodiamond surface and protonated amines on the PAAm, (ii) covalent interactions between carbonyls at the nanodiamond surface and free amines on PAAm, and (iii) hydrogen bonding between hydroxyl groups on the nanodiamond and the amine groups on PAAm.…”

“…Diamond and carbon have superior thermal, pH, and mechanical stability and accordingly are good candidates for supports for HPLC for duty under extreme operating conditions . Indeed, newly developed nanodiamond/carbon‐based core–shell materials from our group have shown some promising results .…”

Flow-dependent separation selectivity for organic molecules on metal–organic frameworks containing adsorbents

“…The retention of alkyl benzenes on UiO-66@SiO 2 is generally similar to that observed for silica columns in normal phase HPLC. 27 However, for the PAHs the following retention order was obtained: biphenyl o anthracene o naphthalene, which is unusual for this chromatographic mode. Additional experiments are required to understand such selectivity for UiO-66@SiO 2 , and more detailed investigation about chromatographic performance of UiO-66@SiO 2 adsorbent in different chromatographic modes will be presented in a forthcoming paper.…”

Direct modification of hydrogen/deuterium-terminated diamond particles with polymers to form reversed and strong cation exchange solid phase extraction sorbents

“…In contrast, diamond is an extraordinary material because of its mechanical stability at high pressure, excellent chemical stability over a very wide pH range, thermal stability, and general chemical stability and inertness [10][11][12]. These properties make it an attractive material for many applications, including, perhaps, as a stationary phase/support for SPE [13], HPLC [14][15][16][17][18][19], and capillary ultrahigh pressure liquid chromatography (UHPLC) [20,21]. There are a few recent examples of diamond's use in separation science [22].…”