On the mechanism of ion exchange in zirconium phosphates—XXI Intercalation of amines by α-zirconium phosphate

Layered metal uranyl phosphates. Retention of divalent ions by amine intercalates of uranyl phosphates

“…The last of these immediately precedes a DTA exothermic effect (340"C), the result of the combustion of organic residues. These processes are comparable to the observed by Clearfield and Tindwa (19).…”

“…The perpendicular arrangement of an alkyl chain with four !toms of carbon between the layers would originate from 14.85 A layer spacing, very close to that obtained here (14.65 A). The existence of a monolayer in the n-butylamine intercalate (BAUP) contrasts with the bilayer found in the hydrogen phosphate of zirconium (19). This compound has an available layer surface arFa around the hydrogen atoms that is smaller than the HUP (24 against 48.8 A2).…”

Intercalation of aromatic amines into α-tin(IV) hydrogenphosphate monohydrate

“…The highest content of intercalated BZ was obtained with a molar ratio BZ added/a-SnP 3:l (1:l mol of BZ/mol of a-SnP). Under this condition the characteristic reflection line of a-SnP at 7.8 A is not readil observed, and the increase in basal spacing was 10.1 A (17.9 A -7.8 A), a value very close to that expected for perpendicular orientation if it is assumed that the -NH2 groups are engaged in a symmetrical hydrogen bond with POH groups of adjaceqt layers and that the 0-H...N bond length and angle are 2.8 A and 180°, respectively (14). The diffraction peaks appearing at 13.6A and its harmonic of higher order at 6.8 A in the XRD patterns of the 1: 1 BZ intercalate may correspond to a phase with no perpendicular orientation of the amine (Fig.…”

Synthesis and Characterization of Organic–Inorganic Hybrid GeOx/Ethylenediamine Nanowires

“…[8] Therefore, the weak interaction between EDA and the inorganic framework can be ascribed to the (N-HO-Ge) H-bonding, which resembles the relatively weak (N-HO-P) H-bonding resulting from alkylamines intercalating into the structure of a-Zr(HPO 4 ) 2 H 2 O. [12] Therefore, on basis of these results, a model (Scheme 1) is proposed for the hybrid nanowires: the EDA intercalating into the nanowires connects the sub-nanometer inorganic units through (N-HO-Ge) H-bonding to achieve the organic-inorganic hybrid structure, which is similar to the metal-chalcogen layers pillared by amine in ZnS/cyclohexylamine nanowires.…”