1D lead(II) coordination chains with carboxylate containing ligands. A rare example of polyrotaxane 1D -> 1D interpenetrated coordination polymer

The structural determination of twointeresting lead(II) coordination polymers, namely [Pb(ind)2(H2O)]n (1) and [Pb2(dbsf)2(bipy)]n (2) (Hind = indane-2-carboxylic acid, H2dbsf= 4,4′-sulfonyldibenzoic acid, and bipy 4,4′- bipyridine), reveals in the second an unexpected polyrotaxane 1D → 1D interpenetrated coordination polymer thanks to the hemidirected coordination geometry of the metal and the rings formed by the dicarboxybiphenyl sulfone ligands along the 1D chain

Topological aspects of lanthanide\u2013adipate\u2013aqua compounds: Close packed and open framework structures

A searchintheCambridgeStructuralDatabase(CSD)forlanthanidecomplexeswithadipate[OOC(CH2)4 COO]2 12 and aqualigandsretrievedafairnumberofcompounds.Tothisdatasetanewlanthanummetal\u2013 organic framework,{[La2(adip)3(H2O)2] (1) (adipH2\ubcadipic acid),synthesisedandstructurallycharac- terized intheselabs,wasincluded.Thecrystalstructuresofthesecoordinationpolymers,ofgeneral formulation [Ln2(adip)3(H2O)x], exhibitavarietyoftopologiesanddimensionality,whichwereclustered in differentclassesanddescribedindetail.Itwasexploredthatthemajorityoftheseevidencesthe presence ofmetalchainsordinuclear Ln2 entities (separatedinbothcasesby4.0\u20134.8 \uc5),where lanthanide ionsaredifferentlyconnectedbycarboxylategroupswithchelatingoroxygen-bridging mode. Thedifferentamountofcoordinatedwatermoleculesappeartoaffectthesolidstatenetworks. Moreoverthecrystalpackingofthesecompoundsshowspeculiaraspectsandexampleswerereportedin the literaturewherethelongalkylchainofadipateconnectorsgiverisetointerpenetratedstructures,or to porousmaterialwherelatticewaterorneutrallargermoleculesareclathrated

Three manganese(II) coordination polymers with mixed donor ligands: synthesis, X-ray structures and luminescence properties

Three new coordination polymers of manganese(II) of formulae [Mn3(phen)2(phdac)3]2H2O (1), [Mn(4,40-bipy)(H2O)4](cbprop)(2) and [Mn(2,20-bipy)(4-nph)(H2O)2]2 (3) (phen = 1,10-phenanthroline, 4,40-bipy = 4,40-bipyridine, 2,20-bipy = 2,20-bipyridine, H2phdac = 1,4-phenylenediacetic acid, H2cbprop = 4-carboxybenzenepropanoic acid and H2nph = 4-nitrophthalic acid) have been synthesized and structurally characterized by X-ray single-crystal diffraction analysis. The metal complexes possess 2D (1), 1D (2) and 0D (3) dimensionalities. In each case, the crystal packing shows three-dimensional architecture by means of p–p interactions and/or hydrogen bonding supported by coordinated and lattice water molecules. The emission spectra show metal-perturbed intra-ligand p*–p charge transfer transitions for 1 and p*–p and p*–n charge transfer transitions for 3

Two three-dimensional coordination polymers of lead(II) with iminodiacetate and naphthalene-dicarboxylate anions: Synthesis, characterization and luminescence behavior

Two lead(II) compounds [Pb3(idiac)3(phen)2(H2O)] . 2(H2O) (1) and [Pb(ndc)]n (2), where H2idiac = iminodiacetic acid, phen = 1,10-phenanthroline and H2ndc = naphthalene-2,6-dicarboxylicacid ,have been synthesized and structurally characterized. Singlecrystal X-ra ydiffraction analysis showed that compound 1 is adiscrete trinuclear complex (of two-fold symmetry) which evolves to a supramolecular 3D network via \u3c0\u2013\u3c0 interactions, while i ncompound 2 the naphthalene dicarboxylate anion act as a linker to form a three dimensional architecture, where the anion adopts a bis-(bidentatebridging) coordination mode connecting four Pb(II) centers.The photoluminescence property of the two complexes hasbeenstudied

Three New Co-ordination Polymers of Zinc(II) and Cadmium(II) with Dicarboxylate and Bipyridine Ligands: Synthesis, Structure and Luminescence Study

Three coordination polymers of zinc(II) and cadmium(II) of formula {[Zn(bipy)(NIPH)]0.15H2O}n(1), {[Cd2(bipy)2(NIPH)2]2H2O}n (2) and {[Cd2(bipy)4 (BDAC)(NO3)](NO3)6H2O}n (3) (NIPH = 5-nitro-isophthalic acid, H2BDAC = 1,4-benzenediacrylic acid and bipy = 2,20-bipyridine) have been synthesized and structurally characterized by X-ray single crystal diffraction analysis. All the complexes display 1D coordination polymers where M(bipy) units are connected by dicarboxylate anions(and also by nitrate in 3)acting as bridging ligands. While in 1 and 3 a zig–zag chain is generated, in case of 2 a double linear chain is formed by the two crystallographic distinct Cd atoms. In solid state all the complexes expand the dimensionality to 3D by means of p–p interactions among p rings and H-bonds generated by lattice water molecules. The fluorescence study indicates intraligand p–p* charge transfer is the reason for emission in all the complexes

Synthesis, Crystal Structure, Thermal and Luminescent Characterization of Two New 3D Cadmium\u2013Carboxylate Frameworks

Two new cadmium coordination polymers have been synthesized with composition {[Cd2(tma)(atz) (H2O)].(H2O)}n (1) (tmaH3 = benzene-1,3,5-tricarboxylicacid, atzH = 5-aminotetrazole) and [Cd(isoor)2(H2O)2] (2) (isoorH = isoorotic acid). X-ray single crystal structure analysis reveals that complex 1 is 3D coordination polymer. However 2 is mononuclear and turned 3D via hydrogen bonding. Thermogravimetric and luminescence characterization of the complexes were done

3D Coordination Network of Ag(I) Ions with \u3bc 3 -Bridging Melamine Ligands

A new 3D silver complex [Ag(mela)(H2O)(NO3)]n (1) (mela = melamine or 2,4,6-triaminotriazine) is synthesized and characterized by single crystal X-ray diffraction, IR, and elemental analysis. The structural characterization shows that the compound crystallizes in space group C c, a = 8.181(2), b = 10.269(3) c = 11.347(3) A \ub0 , b = 105.88(2) A, Z = 4. Out of several structurally characterized transition metal compounds comprising melamine, the titled complex represents a rare example of l3-melamine coordination mode realized through the heterocycle nitrogen donors. The fluorescent property of complex 1 was investigated and the mechanism was validated by means of a density functional theory (DFT) calculation

Two new metal-organic coordination polymers of lead with O-, N-donor ligands: Synthesis, characterization, luminescence and thermal behavior

The synthesis of two new lead(II) coordination polymers, [Pb2(picOH)4] .H2O (1) and [Pb3(Sip)2- (H2O)2] .H2O (2) has been reported, where HpicOH = 3-hydroxypicolinic acid and NaH2Sip = 5-sulfoi- sophthalic acid monosodium salt .Both the complexes were structurally characterized by X-ray single crystal diffraction analysis.Complex 1, where the 3-hydroxypicolinate ligand is used for the first time in conjunction withPb(II), revealed to bea1D polymericarray. Complex 2 showed a 3D structure with 5-sulfoisophthalate ligand adopting two novel binding modes of high denticity (eta-6mu-6 and eta-7mu-7). The photoluminescence and thermal properties of the two complexes have been studied