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Updated: Jun 7, 2025

Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
Published on: May 12, 2023
Multifunctional chiral metal hydrogen-bonded organic frameworks constructed from lanthanide ions with a trigonal
Guo Peng1, Guo-Xing Zhou1, Xiang-Tao Dong1
1State Key Laboratory of Materials-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P. R. China. guopeng@njtech.edu.cn.
Abstract:
Two pairs of chiral enantiomers D/L-Dy(PMP)3·2H2O (D-1/L-1) and D/L-Yb(PMP)3·2H2O (D-2/L-2) were synthesized by the introduction of enantiomerically pure D/L-PMP (PMP = (phosphonomethyl)proline) ligands into lanthanide coordination chemistry. The chiral characteristics of these products were confirmed by single crystal X-ray diffraction, second harmonic generation (SHG) measurements and circular dichroism (CD) spectroscopy. These complexes are composed of 1D chains constructed from lanthanide ions with a trigonal prismatic coordination geometry and PMP ligands. The assembly of the 1D chains led to the formation of a lanthanide hydrogen-bonded organic framework with 1D water chains filled in the channels. Zero-field slow relaxation of magnetization was detected in L-1, whereas L-2 showed field-induced single-molecule magnet (SMM) behavior. Complexes D-1, L-1 and L-2 show proton conductive ability and their conductivity values reach the order of 10-5 S cm-1 at 90 °C and 98% relative humidity.
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