Robert Frost in the Magazines

Nanoporous polymer – Clay hybrid membranes for gas separation

“…The four 29 Si NMR peaks correspond to the four different types of silicon atoms in the structure as indicated in Scheme 1 (see S.I. section) [25,38].…”

“…The three different Q 3 silicon atoms in the layer give peaks at À92 ppm, À94.3 ppm and À97.8 ppm, respectively for Si located at near edge (2), center (3) and edge (1), as indicated on Scheme 1 (see S.I. Section) [25,38]. Fig.…”

“…The three peaks observed in Fig. 5A at À92 ppm, À94.8 ppm and À98.3 ppm correspond to the Q 3 silicons in the clay structure [25,38]. In the case of PDMS/Sepiolite (Fig.…”

Characterization of the reactivity of a silica derived from acid activation of sepiolite with silane by 29Si and 13C solid-state NMR

“…Silicates and more concretely clay minerals have been studied by solid state NMR [24][25][26]. Barron et al [27,28] reported the first solid state NMR work on sepiolite, which consists of three wellresolved resonances at −92.7, −94.3, and −90.2 ppm. A significantly less intense resonance around −85 ppm was also observed.…”