Tuning of the exchange interaction and the Curie temperature by mixed crystal formation of the bridging anionic ligandsElectronic supplementary information (ESI) available: Experimental procedures, TG-DTA curves, XRPD pattern, IR spectra and additional magnetic data. CCDC 1879835-1879840. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c8cc09392j
Mixed crystals with the composition [Co(NCS) x (NCSe) 2− x (pyridine) 2 ] n were prepared from solution and by annealing of Co(NCS) x (NCSe) 2− x (pyridine) 4 . With increasing selenocyanate content, an increase of the magnetic exchange constant and of the critical temperature (Curie temperature) is...
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| Main Authors | , , , , |
|---|---|
| Format | Journal Article |
| Published |
26.02.2019
|
| Online Access | Get full text |
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| Summary: | Mixed crystals with the composition [Co(NCS)
x
(NCSe)
2−
x
(pyridine)
2
]
n
were prepared from solution and by annealing of Co(NCS)
x
(NCSe)
2−
x
(pyridine)
4
. With increasing selenocyanate content, an increase of the magnetic exchange constant and of the critical temperature (Curie temperature) is observed, which offers a rational route to control these parameters in detail, without changing the metal cations.
A strategy to continuously tune the exchange constant
J
and the critical temperature
T
c
in the 1D coordination polymers [Co(NCS)
x
(NCSe)
2−
x
(pyridine)
2
]
n
is reported. For such mixed crystals, prepared by annealing and from solution, an increase of
J
and
T
c
with increasing selenocyanate content is observed. |
|---|---|
| Bibliography: | For ESI and crystallographic data in CIF or other electronic format see DOI 10.1039/c8cc09392j Electronic supplementary information (ESI) available: Experimental procedures, TG-DTA curves, XRPD pattern, IR spectra and additional magnetic data. CCDC 1879835-1879840 |
| ISSN: | 1359-7345 1364-548X |
| DOI: | 10.1039/c8cc09392j |