Anion-dependent assembly of four sensitized near-infrared luminescent heteronuclear Zn(II)-Yb(III) Schiff base complexes from a trinuclear Zn(II) complex.

Four anion-dependent 0D Zn(II)-Yb(III) heterometallic Schiff base complexes, [YbZn2L2(OAc)4]·ClO4 (2), YbZnL2(NO3)3 (3), [(YbL)2(H2O)Cl(OAc)]2·[ZnCl4]2 (4), and YbZnL(OAc)4 (5), were assembled through central metal substitution or reconstruction from homotrinuclear Zn(II) complex {[(Zn(OAc)(H2O)L]2Zn}(ClO4)2·4H2O [1; HL = 2-ethoxy-6-[(pyridin-2-ylmethylimino)methyl]phenol] with different Yb(III)X3 salts [X = ClO4 (2), NO3 (3), Cl (4), and OAc (5)], in which the Zn(II)-sensitized near-infrared luminescent performances in the four complexes 2-5 are closely related to their structural models.

Temperature-/solvent-dependent low-dimensional compounds based on quinoline-2,3-dicarboxylic acid: structures and fluorescent properties.

A series of 0-D, 1-D, and 2-D metal-organic compounds through reactions of quinoline-2,3-dicarboxylic acid (2,3-H(2)qldc) with transition metal salts MCl(2), namely, M(2,3-Hqldc)(2)(H(2)O)(2) (M = Co(1), Zn(4) and Cd(7)), [M(3-qlc)(2)(H(2)O)(2)](n) (M = Co(2), Zn(5) and Cd(8)), M(2-qldc-3-OCH(3))(2)(CH(3)OH)(2) (M = Co(3) and Zn(6)) and [Cd(2,3-qldc-OCH(3))(μ(2)-Cl)](2n) (9) (where, 3-Hqlc = quinoline-3-carboxylic acid and 2-qldc-3-OCH(3) = 3-(methoxycarbonyl)quinoline-2-carboxylic acid), were synthesized and characterized by elemental analysis, IR, thermogravimetric analysis (TG), and single-crystal X-ray diffraction. When the temperature ranged from room temperature to 70 °C, three isomorphous mononuclear complexes 1, 4 and 7 were obtained in H(2)O/H(2)O + CH(3)OH. As the temperature rose further to above 90 °C, due to the decomposition of 2-position carboxyl group in ligand 2,3-H(2)qldc, the same reactions, respectively, produced three isomorphous 2-D layer-like structures 2, 5 and 8 with 4(4) topology in water.

catena-Poly[copper(I)-bis-[μ-3-(1H-imidazol-2-yl)pyridine]-copper(I)-di-μ-iodido].

The title polymeric compound, [Cu(2)I(2)(C(8)H(7)N(3))(2)](n) [C(8)H(7)N(3) = 3-(1H-imidazol-2-yl)pyridine (HIPy), where HIPy comes from the in situ deca-rboxylation of 2-(pyridin-3-yl)-1H-imidazole-4,5-dicarb-oxy-lic acid (H(3)PyIDC)], was obtained under solvo-thermal conditions. Each Cu(I) cation is in a distorted tetra-hedral coordination environment defined by two iodide anions and two nitro-gen atoms from two individual HIPy ligands. Two Cu(I) atoms are connected by two HIPy ligands to form a dimer and these dimers are further bridged through the iodide atoms, leading to a chain structure extending parallel to [100].

trans-Diaqua-bis-[5-carb-oxy-2-(3-pyrid-yl)-1H-imidazole-4-carboxyl-ato-κN,O]cobalt(II).

In the title complex, [Co(C(10)H(6)N(3)O(4))(2)(H(2)O)(2)], the Co(II) atom is located on an inversion centre and displays a distorted octa-hedral coordination geometry defined by two N,O-bidentate ligands in the equatorial plane and two water mol-ecules in the axial positions. The conformation is stabilized by intra-molecular O-H⋯O hydrogen bonds. Inter-molecular N-H⋯O hydrogen bonds link the mol-ecules into chains, which are further connected by inter-molecular O-H⋯O and O-H⋯N hydrogen-bonding inter-actions, forming a two-dimensional supra-molecular network parallel to (110).

Dibenzyl sulfoxide.

There are two independent mol-ecules in the asymmetric unit of the title compound, C(14)H(14)OS, which have asymmetric S-C bonds [1.791 (5) and 1.804 (5) Å in one mol-ecule and 1.

Poly[[diaqua-bis(μ(2)-isonicotinato-κN:O)bis-(μ(3)-isonicotinato-κN:O:O')neodymium(III)disilver(I)] nitrate monohydrate].

In the title complex, {[Ag(2)Nd(C(6)H(4)NO(2))(4)(H(2)O)(2)]NO(3)·H(2)O}(n), the Nd(III) ion is coordinated by eight O atoms from six isonicotinate ligands and two water mol-ecules in a distorted square anti-prismatic geometry. Each Ag(I) ion is coordinated by two N atoms from two different isonicotinate ligands. The crystal structure exhibits a two-dimensional heterometallic polymeric layer.

Dichlorido(4,5-diaza-fluoren-9-one-κN,N')palladium(II).

The structure of the title compound, [PdCl(2)(C(11)H(6)N(2)O)], shows a nearly square-planar geometry for the Pd(II) atom within a Cl(2)N(2) donor set.