Coordination
Polymers Based on Heterohexanuclear Rare
Earth Complexes: Toward Independent Luminescence Brightness and Color
Tuning
François Le Natur
Guillaume Calvez
Carole Daiguebonne
Olivier Guillou
Kevin Bernot
James Ledoux
Laurent Le Pollès
Claire Roiland
10.1021/ic4008697.s001
https://acs.figshare.com/articles/journal_contribution/Coordination_Polymers_Based_on_Heterohexanuclear_Rare_Earth_Complexes_Toward_Independent_Luminescence_Brightness_and_Color_Tuning/2410444
Reactions in solvothermal conditions
between hexanuclear rare earth
complexes and H<sub>2</sub>bdc, where H<sub>2</sub>bdc symbolizes
terephthalic acid, lead to a family of monodimensional coordination
polymers in which hexanuclear complexes act as metallic nodes. The
hexanuclear cores can be either homometallic with general chemical
formula [Ln<sub>6</sub>O(OH)<sub>8</sub>(NO<sub>3</sub>)<sub>6</sub>]<sup>2+</sup> (Ln = Pr–Lu plus Y) or heterometallic with
general chemical formula [Ln<sub>6<i>x</i></sub>Ln′<sub>6–6<i>x</i></sub>O(OH)<sub>8</sub>(NO<sub>3</sub>)<sub>6</sub>]<sup>2+</sup> (Ln and Ln′ = Pr–Lu plus
Y). Whatever the hexanuclear entity is, the resulting coordination
polymer is iso-structural to [Y<sub>6</sub>O(OH)<sub>8</sub>(NO<sub>3</sub>)<sub>2</sub>(bdc)(Hbdc)<sub>2</sub>·2NO<sub>3</sub>·H<sub>2</sub>bdc]<sub>∞</sub>, a coordination polymer that we have
previously reported. The random distribution of the lanthanide ions
over the six metallic sites of the hexanuclear entities is demonstrated
by <sup>89</sup>Y solid state NMR, X-ray diffraction (XRD), and luminescent
measurements. The luminescent and colorimetric properties of selected
compounds that belong to this family have been studied. These studies
demonstrate that some of these compounds exhibit very promising optical
properties and that there are two ways of modulating the luminescent
properties: (i) playing with the composition of the heterohexanuclear
entities or (ii) playing with the relative ratio between two different
hexanuclear entities. This enables the independent tuning of luminescence
intensity and color.
2013-06-03 00:00:00
entity
hexanuclear complexes act
XRD
H 2bdc
Independent Luminescence Brightness
NMR
6O
Ln
hexanuclear entities
monodimensional coordination polymers
coordination polymer
chemical formula