Iron chloride oxide , intercalate

CIF10TIC12, Thallium(III), chIorobis(penta-fluorophenyl)-, 21 71, 72 ClFeO, Iron chloride oxide intercalate with 4-aminopyridine (4 1), 22 86... 

FeBgCigHso, [l,l-commo-bis(2,3-dicarba-l-ferra-c/oio-heptaborane)](12),2,2, 3,3 -tetraethyI-l,l-dihydro-, 22 215 FeBrMg02PC29H4s, Magnesium, bromo(Ti -cyclopentadienyI)[l, 2-ethanediyl-bis(diphenylphosphine)]bis-(tet ahy-d ofu an)i on-, (Fe-Mg), 24 172 FeBrP2C3iH29, Iron, bromo(Ti -cyclopenta-dienyl)[l,2-ethanediylbis(diphenyl-phosphine)]-, 24 170 FeQO, Iron chloride oxide intercalate with 4-aminopyridine (4 1),22 86... 

The layered compound iron(lll) chloride oxide FeOCl absorbs pyridine derivative molecules into its van der Waals gap forming the intercalation compounds FeOCl (pyridine derivative), . Iron(III) chloride oxide and the pyridine derivatives act, respectively, as a Lewis acid and base in the reaction with a partial transfer of the pyridine derivative electrons to the host FeOCl layer. Electrical resistivity of the host FeOCl decreases from 107 2-cm to 103 J2-cm with intercalation, and the interlayer distance expands to almost twice the original value. 

The d values corresponding to the interlayer distances are 7.92 A for FeOCl, and 13.27(P), l3.57(APy), and 11.9(TMPy), for the intercalated FeOCl. Iron(III) oxide chloride is a semiconductor with a resistivity of 107 fl-cm at room temperature. The intercalated complexes are still semiconductive but exhibit improved electrical conductivities along their c axes. The electrical resistivities at room temperature are 10, 103, and 103 fl-cm, respectively, for Py, APy, and TMPy intercalated FeOCl. 

Iron(III) chloride oxide is prepared by sealing a mixture of 100 mg a-Fe203 (0.63 mmol) and 220 mg FeCla (1-36 mmol) in a Pyrex glass tube 20 cm long and 2.0 cm in diameter with a wall thickness of 2.0 mm and heating at 370° for 2-7 days. The product is washed with water to remove excess FeCls. The red-violet blade like crystals of FeOCl which are obtained are then washed with acetone, dried, and stored in a desiccator with silica gel. Prolonged exposure to moist air will cause hydrolysis of the FeOCl and render it incapable of forming intercalation compounds. 

The oxide (an intercalated laminar material) is thermally unstable and on rapid heating it will deflagrate at a temperature dependent on the method of preparation. This temperature is lowered by the presence of impurities, and dried samples of iron(III) chloride-impregnated oxide explode on heating. 

The intercalation of PANI in zirconium phosphate (ZrP) was also reported by Chang et al. [69]. Different phases of zirconium phosphate, such as y-ZrP, the dihydrogen form of a-ZrP [o -ZrP(HH)], and o -ZrP(NaNa), were intercalated with aniline by either ion-exchange or adsorption, and then polymerized by oxidizing agents such as ammonium peroxydisulfate and iron (III) chloride. The resulting polyaniline nanocomposites showed measurable electrical conductivities, as listed in Table 6.3. 

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