title: White Light Emissive Dy(III) Single-Molecule Magnets Sensitized by Diamagnetic [Co(III) (CN)6 ](3-) Linkers.
abstract: The self-assembly of Dy(III) -3-hydroxypyridine (3-OHpy) complexes with hexacyanidocobaltate(III) anions in water produces cyanido-bridged {[Dy(III) (3-OHpy)2 (H2 O)4 ] [Co(III) (CN)6 ]}⋅H2 O (1) chains. They reveal a single-molecule magnet (SMM) behavior with a large zero direct current (dc) field energy barrier, ΔE=266(12) cm(-1) (≈385 K), originating from the single-ion property of eight-coordinated Dy(III) of an elongated dodecahedral geometry, which are embedded with diamagnetic [Co(III) (CN)6 ](3-) ions into zig-zag coordination chains. The SMM character is enhanced by the external dc magnetic field, which results in the ΔE of 320(23) cm(-1) (≈460 K) at Hdc =1 kOe, and the opening of a butterfly hysteresis loop below 6 K. Complex 1 exhibits white Dy(III) -based emission realized by energy transfer from Co(III) and 3-OHpy to Dy(III) . Low temperature emission spectra were correlated with SMM property giving the estimation of the zero field ΔE. 1 is a unique example of bifunctional magneto-luminescent material combining white emission and slow magnetic relaxation with a large energy barrier, both controlled by rich structural and electronic interplay between Dy(III) , 3-OHpy, and [Co(III) (CN)6 ](3-) .
authors.affiliation: Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan. chorazy@chemia.uj.edu.pl.|Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060, Kraków, Poland. chorazy@chemia.uj.edu.pl.
authors.forename: Szymon
authors.initials: S
authors.lastname: Chorazy
authors.affiliation: Institute of Physics, Jagiellonian University, Łojasiewicza 11, 30-348, Kraków, Poland.
authors.forename: Michał
authors.initials: M
authors.lastname: Rams
authors.affiliation: Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
authors.forename: Koji
authors.initials: K
authors.lastname: Nakabayashi
authors.affiliation: Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060, Kraków, Poland.
authors.forename: Barbara
authors.initials: B
authors.lastname: Sieklucka
authors.affiliation: Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan. ohkoshi@chem.s.u-tokyo.ac.jp.
authors.forename: Shin-Ichi
authors.initials: S
authors.lastname: Ohkoshi
keywords: cobalt; cyanides; dysprosium; lanthanides; luminescence