Chemical preparation, X-ray single crystal, thermal analysis, and IR spectrometric investigation of C4H14N2SO4·H2O (denoted DAMPS) are described. DAMPS crystallizes in the orthorhombic system with P212121 space group, a = 9.2726(4) Å, b = 9.5227(2) Å, c = 10.3807(4) Å, V = 916.62(6) Å3, and Z = 4. The DAMPS structure is built up from inorganic chains parallel to the b axis and linked via Ow–H···O hydrogen bonds. These chains are interconnected by organic groups so as to build a three-dimensional arrangement. 相似文献
The food antioxidant quercetin was used as a template in an ultrathin molecularly imprinted polymer (MIP) film prepared by photopolymerization. Indium tin oxide (ITO) plates were electrografted with aryl layers via a diazonium salt precursor bearing two terminal hydroxyethyl groups. The latter act as hydrogen donors for the photosensitizer isopropylthioxanthone and enabled the preparation of MIP grafts through radical photopolymerization of methacrylic acid (the functional monomer) and ethylene glycol dimethacrylate (the crosslinker) in the presence of quercetin (the template) on the ITO. The template was extracted, and the remaining ITO electrode used for the amperometric determination of quercetin at a working potential of 0.26 V (vs. SCE). The analytical range is from 5.10−8 to 10−4 mol L−1, and the detection limit is 5.10−8 mol L−1.
The food antioxidant quercetin was used as a template in an ultrathin molecularly imprinted polymer (MIP) film prepared by photopolymerization. Indium tin oxide (ITO) plates were electrografted with aryl layers via a diazonium salt precursor bearing two terminal hydroxyethyl groups. The latter act as hydrogen donors for the photosensitizer isopropylthioxanthone and enabled the preparation of MIP grafts through radical photopolymerization of methacrylic acid (the functional monomer) and ethylene glycol dimethacrylate (the crosslinker) in the presence of quercetin (the template) on the ITO. The template was extracted, and the remaining ITO electrode used for the amperometric determination of quercetin at a working potential of 0.26 V (vs. SCE). The analytical range is from 5.10?8 to 10?4 mol L?1, and the detection limit is 5.10?8 mol L?1.
Figure
This work describes the grafting of a molecularly imprinted polymer (MIP) film by combining diazonium surface chemistry and surface-initiated photopolymerization. The MIP grafts specifically and selectively recognize quercetin in pure solution in THF and in real green tea infusion. 相似文献
K3Sb4BO13, Mr = 823.11 g.mol–1, crystallizes in the triclinic system, space group P
, Z = 2. The lattice parameters are a = 7.133(1) Å, b = 7.232(1) Å, c = 13.259(2) Å, = 82.00 (1)°, = 99.77(1)° and = 117.08(1)°, V = 598.7(2) Å3, Dx = 4.566 Mg m–3. The final R index and weighted Rw index are 0.0251 and 0.0623, respectively. The three-dimensional network of the title compound is constituted by layers (Sb3O9)n, similar to that of hexagonal bronze of Magneli. These layers are linked together, in the c direction, alternatively by edge-sharing pairs of SbO6 octahedra and BO3 triangles. This framework has interconnected tunnels, running approximately along the a and b directions, in which the K+ ions are located. 相似文献