| SM ISO690:2012|
LOZOVAN, Vasile; KRAVTSOV, Victor; FONARI, Stela. 3D Cd(II) coordination polymer assembled from biphenyl-4,4'-dicarboxylic acid and N,N'-(1,4-phenylene)bis(1- (pyridin-4-yl)methanimine) ligands. In: New trends and strategies in the chemistry of advanced materials with relevance in biological systems, technique and environmental protection. Ediția a 13-a, 7-8 octombrie 2021, Timișoara. Timişoara, România: Institute of Chemistry Timişoara of the Romanian Academy, 2021, p. 40.
|New trends and strategies in the chemistry of advanced materials with relevance in biological systems, technique and environmental protection
Ediția a 13-a, 2021
Conferința "New trends and strategies in the chemistry of advanced materials with relevance in biological systems, technique and environmental protection" |
Timișoara, Romania, 7-8 octombrie 2021
Coordination polymers and metal-organic frameworks are currently among the most prolific research areas of inorganic chemistry and crystal engineering. Their properties such as low density, large surface area, pore function regulation and structural flexibility offer them the possibility to be applied in gas storage, catalysis, magnetism, optics, etc. . The selection of spaced dicarboxylic ligands offers the possibility of obtaining structures with large cavities. The blend of biphenyl-4,4'-dicarboxylic acid (H2bpda) with the azomethine N,N'-type ligand N,N'-(1,4-phenylene)bis(1-(pyridin-4-yl)methanimine) (bda4bPy) led to the 3D coordination polymer [Cd(bpda)(bda4bPy)]n, whose crystal structure was confirmed by single-crystal X-ray diffraction analysis (Figure 1). Compound crystallizes in the monoclinic P2/c space group. Each Cd(II) atom takes the N2O5 pentagonal bipyramidal geometry. One carboxylic group coordinates in a chelate mode, the other – in a chelate-bridging mode (Fig. 1a). Dicarboxylate ligands provide the metal-carboxylate 2D coordination network. The bda4bPy double pillars withstand perpendicular to this plane and provide the Cd···Cd separations along the crystallographic b axis of 20.063(2) Å. The big rhombohedral cavities in the metal-carboxylate layer provide possibilities for interpenetration, and the crystal packing revealed the two-fold parallel interpenetration of 3D networks. Voids constitute 39.7% or 1723.6 Å3 of the unit cell volume and were registered as an alternation of rows of wide and narrow channels (Fig. 1b).