ic0c03443_si_001.pdf (661.58 kB)
Multi-Nuclear Rare-Earth-Implanted Tartaric Acid-Functionalized Selenotungstates and Their Fluorescent and Magnetic Properties
journal contribution
posted on 2021-01-25, 19:34 authored by Jinglin Liu, Dan Wang, Xin Xu, Hailou Li, Junwei Zhao, Lijuan ChenA family
of multinuclear rare-earth (RE)-implanted H2tart2–-functionalized selenotungstates (STs) [H2N(CH3)2]13H{[W2O5(OH)2(H2tart)2](H2tart){[W3O6RE2(H2O)6][SeW9O33]2}2}·31H2O [RE
= Eu3+ (1), Tb3+ (2), Dy3+ (3), Ho3+ (4), Y3+ (5); H4tart = d-tartaric acid] have been afforded by a simple one-pot aqueous reaction
and were structurally characterized. Intriguingly, their isomorphous
organic–inorganic hybrid anion {[W2O5(OH)2(H2tart)2](H2tart){[W3O6RE2(H2O)6][SeW9O33]2}2}14– includes two sandwich-type {[W3O6[RE2(H2O)6][SeW9O33]2}4– dimeric units
with a W–O–RE heterometal core, which are further joined
by two H2tart2–-decorated dinuclear tungsten-oxo
{W2O5(OH)2(H2tart)2} clusters and a bridging H2tart2– ligand, contributing to a surprising Mobius band-like configuration.
It is worth emphasizing that three H2tart2– ligands coordinate with tungsten centers rather than RE cations.
For all we know, 1–5 delegate the
infrequent RE-implanted STs functionalized by triplicate H2tart2– bridges. Furthermore, fluorescent performances
of 1–4 as well as magnetic properties
of 2–4 have been surveyed. The solid-state
fluorescence emission spectra prove that each of them undoubtedly
shows the characteristic emission peaks of RE cores, while alternating-current
susceptibility measurements suggest field-induced single-molecule
magnetic behavior in 3.
