Pillar chemistry. Part 4. Palladium(II)–2,2′-bipyridyl, –1,10-phenanthroline, and –2,9-dimethyl-1,10-phenanthroline complex pillars in α-zirconium phosphate

摘要: Palladium(II) can be exchanged into the layered composites α-Zr(HPO4)2(bipy)0.25·1.5H2O (bipy = 2,2′-bipyridyl), α-Zr(HPO4)2(phen)0.50·2H2O (phen 1,10-phenanthroline), and α-Zr(HPO4)2(dmphen)0.50·2.5H2O (dmphen 2,9-dimethyl-1,10-phenanthroline) to give new palladium(II) amine complex–pillared materials. In all three cases, both 1 :2 :1 PdII:amine complexes are formed between layers. Pillared materials with an interlayer distance as high 17.3 A obtained. Thus, using such in situ preparation methods, it is possible prepare pillared pore dimensions approaching those found zeolite Y. Electronic spectral evidence for presence of different geometries pillars described (square planar bipy phen, but five-co-ordinate dmphen materials). All exchange further metal ions, Co2+, Ni2+, Cu2+, loading levels, a demonstration that they indeed pillared. Evidence presented which shows uptake Cu2+ occurs at rates materials, i.e. cavities have sizes therefore accessibilities. addition, spectroscopic probing (visible–near u.v. e.s.r.) these cavity-exchanged ions clearly demonstrates from present parent α-Zr(HPO4)2·H2O.