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A series of new layered polymers consisting of Ln[Ph2P(O)-CH2CH2-P(O)Ph2]1.5 monomeric units, where Ln = Pr(NO3)3, Nd(NO3)3, NdCl3, Sm(NO3)3, GdCl3, Dy(NO3)3, are synthesized and structurally characterized. The solvothermally prepared polymers exhibit either parquet-floor or brick-wall architecture, whereas the polymers from gel-diffusion reactions resemble honeycomb networks.

It is shown that two phosphine oxide ligands, Ph2P(O)-CH2CH2-P(O)Ph2 and Ph2P(O)-C5H3N-P(O)Ph2, acts as bridging bidentate ligands and form two-dimensional coordination polymers in the reactions with Pr(NO3)(sub 3). Different experiments conducted by using different method including the solvothermal synthesis are presented.

ABSTRACT Eu(NO3)3⋅5H2O and EuCl3⋅6H2O were allowed to react with bis(diphenylphosphino)alkane dioxides Ph2P(O)(CH2) nP(O)Ph2 ( n = 2, 4, 6) to obtain polymeric and binuclear complexes. The prepared compounds were structurally characterized by X-ray diffraction. Luminescence measurements (emission and excitation spectra, quantum yields, lifetimes) were compared with crystallographic data in order to find a relationship between luminescent properties of the Eu(III) complexes and their structures. The Eu(III) polymers, especially [Eu(dpphO2)2Cl2]+Cl-} n, have shown extremely long luminescence lifetimes, up to 3.73 ms, as a result of a highly protecting hydrophobic shield. Copyright © 2011 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]

Abstract: A series of binuclear complexes of a general formula [(dppbO2)Ln(NO3)3(μ-dppbO2)Ln(NO3)3(dppbO2)] (Ln=Pr (1), Nd (2), Sm (3), Dy (4), Lu (5)) were prepared by reacting bis(diphenylphosphino)butane dioxide (dppbO2) with lanthanide nitrates under solvothermal conditions. All compounds were characterized by analytical and spectroscopic techniques, such as infrared spectroscopy and mass spectrometry with electrospray ionization, and their molecular structures were determined by single crystal X-ray diffraction analysis in four cases. In contrast to the majority of lanthanide complexes with bis(diphenylphosphino)ethane dioxide which were previously reported as 2D polymeric networks, the present compounds are strictly molecular. This is evidently manifestation of the longer and flexible ligand backbone that allows a chelating binding mode. [Copyright &y& Elsevier]

Reactions of Pr(NO3)3 with Ph2P(O)—CH2CH2—P(O)Ph2 and Ph2P(O)-C5H3N-P(O)Ph2 yielded layered network coordination polymers with bidentate ligands spanning the lanthanide atoms in a bridging fashion. The praseodymium cations with ‘spacer’ ligands form two-dimensional building blocks assembling into either square grid or herringbone network. [ABSTRACT FROM AUTHOR]

Eu(NO(3))(3) · 5H(2)O and EuCl(3) · 6H(2)O were allowed to react with bis(diphenylphosphino)alkane dioxides Ph(2)P(O)(CH(2))(n) P(O)Ph(2)(n = 2, 4, 6) to obtain polymeric and binuclear complexes. The prepared compounds were structurally characterized by X-ray diffraction. Luminescence measurements (emission and excitation spectra, quantum yields, lifetimes) were compared with crystallographic data in order to find a relationship between luminescent properties of the Eu(III) complexes and their structures. The Eu(III) polymers, especially [Eu(dpphO(2))(2)Cl(2)](+) Cl(-)}(n), have shown extremely long luminescence lifetimes, up to 3.73 ms, as a result of a highly protecting hydrophobic shield., (Copyright © 2011 John Wiley & Sons, Ltd.)