Multifunctional Dinuclear Dy-Based Coordination Complex Showing Visible Photoluminescence, Single-Molecule Magnet Behavior, and Proton Conduction

Abstract

A new Dy-based complex, [Dy 2 (phen) 4 (PAA) 4 ]-(ClO 4 ) 2 (1), was obtained by using 4-hydroxyphenyl acetate (HPAA) as a ligand and 1,10-phenanthroline as an auxiliary ligand. Complex 1 shows a dinuclear structure and a 2D supramolecular layer constructed by π−π stacking interactions. The complex displays a characteristic Dy(III) emission. Moreover, magnetic susceptibility measurements revealed that 1 exhibits a singlemolecule magnet (SMM) behavior. In addition, it also shows a proton conductivity of 1.08 × 10 −5 S cm −1 under 353 K and 100% relative humidity conditions, which is mainly assigned to H-bonded networks formed by the undeprotonated and uncoordinated phenolic groups of HPAA ligands and guest water molecules. Remarkably, 1 is the first example of a dinuclear complex showing photoluminescence, SMM behavior, and proton conduction.

Two Proton Conductive Coordination Polymers Constructed by an Unprecedented Structural Transformation of a Phosphine-Based Tricarboxylate Ligand

“…At a higher 98% RH level, the Nyquist spectra exhibit a semicircle in the high-frequency region and a tail in the low-frequency region, in which the semicircle originates from the bulk and grain boundary resistances and the tail corresponds to the contribution from the ions moving between the electrode and electrolyte (Figure ). − The Nyquist plots are fitted to a suitable equivalent circuit LR­(QR­(CR)­(LR)­(CR)) (Figure inset). As the temperature increases from 303 to 353 K, the proton conductivity (σ) value rises from 4.13 × 10 –6 to 3.12 × 10 –5 S cm –1 , indicating that the conductivity of L·2H 2 O has a significant temperature dependence (Table S8).…”

Reversible single-crystal-to-single-crystal transition in Gd(iii) metal–organic frameworks induced by heat and solvents with a significant magnetocaloric effect

“…On the other hand, there has been a growing interest in metal–organic framework (MOF) materials because of their diverse range of properties, including magnetism. 21–23 In the context of building functional MOF materials, lanthanide ions are good candidates for potential applications due to their high coordination number and the potential for the facile synthesis of novel cluster-based organic framework materials. 24–26 Molecular magnetorefrigerants are of interest because of their potential to replace expensive and rare 3 He in future cryogenic technology.…”

A Tb(III) Complex Based on 3‐Pyridylacetic Showing Luminescent Detection for Fe3+ Ion

“…As a part of our continuous research on luminescent lanthanide-based complexes, [16] herein, we decide to employ the 3-pyridylacetic acid (3-PAA) ligand, which is one of the most important and simple of pyridylecarboxylic ligand, to construct Tb-based complex because: (1) the coordination chemistry of the 3-PAA ligand has mainly focused on transition metals so far, [17] while Ln-complexes based on 3-PAA ligand are rather rare, offering us good research opportunities in this field; (2) the 3-PAA ligand are aromatic π-conjugated, which can function as an excellent sensitizer to enhance lanthanide luminescence;…”