Solvothermal synthesis and crystal structures of two Holmium(III)-5-Hydroxyisophthalate entangled coordination polymers and theoretical studies on the importance of π•••π stacking interactions

Dual-Ligand Strategy Employing Rigid 2,5-Thiophenedicarboxylate and 1,10-Phenanthroline as Coligands for Solvothermal Synthesis of Eight Lanthanide(III) Coordination Polymers: Structural Diversity, DFT Study, and Exploration of the Luminescent Tb(III) Coordination Polymer as an Efficient Chemical Sensor for Nitroaromatic Compounds

“…The two bands appearing in the range of 1641–1633 and 1526–1518 cm –1 are due to the asymmetric stretching modes, and one band appearing in the region of 1386–1369 cm –1 corresponds to the symmetric stretching modes of carboxylic groups. The absence of the characteristic asymmetric vibrations in the range of 1780–1680 cm –1 of carboxylate groups confirms the full deprotonation of 2,5-thiophenedicarboxylic acid residues on coordination to Ln 3+ centers as revealed from single-crystal X-ray analysis . The characteristic band appearing in the regions of 2973–2918 and 1252–1022 cm –1 are attributed to the υ C–H stretching vibrations and −CH– out-of-plane bending modes of the 2,5-TDA 2– linker, respectively.…”

“…The absence of the characteristic asymmetric vibrations in the range of 1780−1680 cm −1 of carboxylate groups confirms the full deprotonation of 2,5thiophenedicarboxylic acid residues on coordination to Ln 3+ centers as revealed from single-crystal X-ray analysis. 118 The characteristic band appearing in the regions of 2973−2918 and 1252−1022 cm −1 are attributed to the υ C−H stretching vibrations and −CH− out-of-plane bending modes of the 2,5-TDA 2− linker, respectively. Distinct IR bands in the 900− 400 cm −1 region are allocated to Ln(III) carboxylate vibrations.…”

Syntheses, Structures, and Magnetic Properties of Novel [3×1 + 2×1] Pentanuclear Zinc(II)-Lanthanide(III) Cocrystal Complexes: Slow Magnetic Relaxation Behavior of the Dy(III) Analogue

“…Zhang and co-workers have reported the first genuine 3d-4f cocrystal of a mononuclear Dy III complex with a square-planar Cu II complex consisting of only one reactant . In fact, the field of lanthanide coordination chemistry has gained a lot of attention because of its potential applications in catalysts, photoluminescent materials, and molecular magnetic materials. − Compounds containing lanthanide (Ln) ions are of special interest in the field of molecular magnetism because they may exhibit an extraordinary slow relaxation of magnetization behavior or single molecule/ion magnet (SMM/SIM) behavior arising from the large spin and significant magnetic anisotropy of Ln III ions. − Despite substantial progress in the field of SMMs, it is worth mentioning that QTM-induced relaxation processes are the biggest roadblock in lowering the effective energy barrier ( U eff ) of lanthanide-containing SMM complexes. ,− There are a few strategies to mitigate the QTM, such as ligand fields of high symmetries around the lanthanide ions, application of a tiny static magnetic field, dilution of such complexes in a diamagnetic matrix, or a strong superinteraction among the paramagnetic ions (3d and 4f metal ions). ,− However, a review of the literature has shown that magnetic exchange coupling resulting from 3d/4f metal ions is often weak and has a small effective energy barrier, but when paramagnetic 3d ions are replaced by diamagnetic metal ions, it may offer magnetic dilution to the system, slowing the QTM process and elevating the energy barrier. , Furthermore, recent studies revealed that the presence of diamagnetic coordinating ions in a Dy III system can alter the electron density distribution around the Dy III ion (particularly around the bridging phenoxido oxygen donor), influencing the orientation of the Dy III g tensor and therefore increasing the energy barrier. − …”

Synthesis and structural characterization of new group 12 metal ions coordination polymers built on sulfur‐based ligand and probing their high iodine adsorption efficiency in micro and bulk forms

“…[21,22] Coordination polymers (CPs) and MOFs are a classification of materials made of metal ion linkages and polydentate bridging ligands. [23][24][25][26][27][28][29][30][31][32] Nano and micro coordination polymers obtained by the sonochemical technique with smaller size, valuable morphologies, and special features than those synthesized via the other available approaches have a high potential in removal of pollutants. [33] Among the different parameters that influence the properties of coordination polymers, selecting appropriate organic ligands can be the most constructive procedure for the synthesis of noteworthy coordination polymers.…”