N-(sulfoethyl) iminodiacetic acid-based lanthanide coordination polymers: Synthesis, magnetism and quantum Monte Carlo studies

A series of lanthanide coordination polymers have been obtained through the hydrothermal reaction of N-(sulfoethyl) iminodiacetic acid (H3SIDA) and Ln(NO3)3 (Ln=La, 1; Pr, 2; Nd, 3; Gd, 4). Crystal structure analysis exhibits that lanthanide ions affect the coordination number, bond length and dimension of compounds 1–4, which reveal that their structure diversity can be attributed to the effect of lanthanide contraction. Furthermore, the combination of magnetic measure with quantum Monte Carlo(QMC) studies exhibits that the coupling parameters between two adjacent Gd3+ ions for anti–anti and syn-anti carboxylate bridges are −1.0×10−3 and −5.0×10−3 cm−1, respectively, which reveals weak antiferromagnetic interaction in 4.

Graphical abstractFour lanthanide coordination polymers with N-(sulfoethyl) iminodiacetic acid were obtained under hydrothermal condition and reveal the weak antiferromagnetic coupling between two Gd3+ ions by Quantum Monte Carlo studies.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Four lanthanide coordination polymers of H3SIDA ligand were obtained. ► Lanthanide ions play an important role in their structural diversity. ► Magnetic measure exhibits that compound 4 features antiferromagnetic property. ► Quantum Monte Carlo studies reveal the coupling parameters of two Gd3+ ions.