Details

Autor(en) / Beteiligte

• Wu, R.-F.
• Shi, H.-P.
• Zhang, J.-R.
• Chang, F.-F.

Titel

A novel 3D energetic coordination polymer containing Co(II) atoms in a pentanuclear cluster

Ist Teil von

• Journal of structural chemistry, 2015-11, Vol.56 (6), p.1136-1142

Ort / Verlag

Moscow: Pleiades Publishing

Erscheinungsjahr

2015

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A novel coordination polymer [Co 5 (OH) 2 (dnbpdc) 4 (H 2 O) 6 ]·16H 2 O ( 1 ) (dnbpdc = 6,6′-dinitro-4,4′-biphenyldicarboxylic acid) is obtained from a hydrothermal reaction. The structure of complex 1 is characterized by elemental analysis, IR spectroscopy, and single crystal X-ray diffraction analysis. The title compound (C 56 H 70 Co 5 N 8 O 56 , M r = 2045.85) crystallizes in the triclinic space group P -1 with a = 11.9349(2) Å, b = 12.1895(2) Å, c = 15.420(2) Å, α = 109.390(7)°, β = 94.786(1)°, γ = 108.027(9)°, V = 1968.4(4) Å 3 , Z = 1, D c = 1.726 g/cm 3 , F (000) = 1045, μ(Mo K α ) = 1.154 mm –1 , T = 133(2) K, the final R = 0.0316 and wR = 0.0692 for 7032 observed reflections with I > 2σ( I ). The coordination polymer is built of a pentanuclear Co(II) cluster, four dnbpdc ligands, two hydroxyl groups, six coordination water and sixteen crystal water molecules. Ligand oxygen atoms exhibit three types of coordination modes (monodentate, syn-syn bridging bidentate and bridging tridentate). Moreover, the infinite three-dimensional supramolecular network is generated by coordination and hydrogen bonds. The thermal stability of complex 1 is evaluated by differential scanning calorimetry and thermogravimetric analysis.