Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 21st October 2020 from 07:00 AM to 07:00 PM (BST).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.



Metal-organic frameworks with solvent-free lanthanide coordination environments: synthesis from aqueous ethanol solutions

Abstract

A series of 12 new metal-organic frameworks based on lanthanide cations (Ln = Nd, Sm–Dy), octahedral cluster anions [Re6S8(CN)6]4– or [Re6Se8(CN)6]4– and adipamide (adp) was synthesized under mild conditions in aqueous ethanol solutions. Compounds of the general composition Cs[Ln(adp)2{Re6Q8(CN)6}]∙3H2O (Ln = Nd, Sm–Dy; Q = S or Se) crystallize in the hexagonal space group P6422. Despite the presence of solvate H2O molecules in structure cavities, the crystal structures revealed that the coordination environment of lanthanide cations in these 3D polymers did not contain H2O ligands. This rare feature is attributed to a combination of a bulk cluster anion and flexible adp molecules, which occupy the lanthanide coordination sphere to yield a stable lanthanide-based building block. This assumption was confirmed by a second crystalline modification of the compound Cs[Nd(adp)2{Re6S8(CN)6}]∙3H2O (orthorhombic space group Cccm). Luminescence studies evidence the presence of the typical red luminescence of hexarhenium cluster complexes and the absence of an observable luminescence of lanthanide cations for all compounds except the Nd derivatives. Magnetic data indicates very weak antiferromagnetic exchange interactions between paramagnetic Ln3+ centers.

Back to tab navigation

Supplementary files

Article information


Submitted
24 Aug 2020
Accepted
05 Oct 2020
First published
06 Oct 2020

CrystEngComm, 2020, Accepted Manuscript
Article type
Paper

Metal-organic frameworks with solvent-free lanthanide coordination environments: synthesis from aqueous ethanol solutions

Y. M. Litvinova, Y. M. Gayfulin, K. Brylev, D. A. Piryazev, J. van Leusen, P. Kögerler and Y. V. Mironov, CrystEngComm, 2020, Accepted Manuscript , DOI: 10.1039/D0CE01240H

Social activity

Search articles by author

Spotlight

Advertisements