@misc{10481/63033,
year = {2020},
url = {http://hdl.handle.net/10481/63033},
abstract = {In this work, three isostructural metal-organic frameworks based on frst row transition metal ions
and 2-aminoisonicotinate (2ain) ligands, namely, {[M(μ-2ain)2]·DMF}n [MII=Co (1), Ni (2), Zn (3)], are
evaluated for their sensing capacity of various solvents and metal ions by monitoring the modulation
of their magnetic and photoluminescence properties. The crystal structure consists of an open
diamond-like topological 3D framework that leaves huge voids, which allows crystallizing two-fold
interpenetrated architecture that still retains large porosity. Magnetic measurements performed on 1
reveal the occurrence of feld-induced spin-glass behaviour characterized by a frequency-independent
relaxation. Solvent-exchange experiments lead successfully to the replacement of lattice molecules by
DMSO and MeOH, which, on its part, show dominating SIM behaviour with low blocking temperatures
but substantially high energy barriers for the reversal of the magnetization. Photoluminescence studied
at variable temperature on compound 3 show its capacity to provide bright blue emission under UV
excitation, which proceeds through a ligand-centred charge transfer mechanism as confrmed by timedependent DFT calculations. Turn-of and/or shift of the emission is observed for suspensions of 3 in
diferent solvents and aqueous solutions containing metal ions.},
publisher = {Nature Research (part of Springer Nature)},
title = {Magnetic and Photoluminescent Sensors Based on Metal-Organic Frameworks Built up from 2-aminoisonicotinate},
doi = {10.1038/s41598-020-65687-6},
author = {García Valdivia, Antonio A. and Pérez Yáñez, Sonia and Rodríguez Diéguez, Antonio},
}