Reversible Guest Binding in a Non-Porous FeII Coordination Polymer Host Toggles Spin Crossover
Artikel i vetenskaplig tidskrift, 2015

Formation of either a dimetallic compound or a 1D coordination polymer of adiponitrile adducts of [Fe(bpte)]2+ (bpte=[1,2-bis(pyridin-2-ylmethyl)thio]ethane) can be controlled by the choice of counteranion. The iron(II) atoms of the bis(adiponitrile)-bridged dimeric complex [Fe2(bpte)2(μ2-(NC(CH2)4CN)2](SbF6)4 (2) are low spin at room temperature, as are those in the polymeric adiponitrile-linked acetone solvate polymer {[Fe(bpte)(μ2-NC(CH2)4CN)](BPh4)2 Me2CO} (3Me2CO). On heating 3Me2CO to 80°C, the acetone is abruptly removed with an accompanying purple to dull lavender colour change corresponding to a conversion to a high-spin compound. Cooling reveals that the desolvate 3 shows hysteretic and abrupt spin crossover (SCO) S=0虠S=2 behaviour centred at 205K. Non-porous 3 can reversibly absorb one equivalent of acetone per iron centre to regenerate the same crystalline phase of 3Me2CO concurrently reinstating a low-spin state.

host-guest systems

iron

spin crossover

sorption

coordination polymers

Författare

Anders Lennartsson

Kemi och kemiteknik, Tillämpad kemi, Polymerteknologi

P. Southon

The University of Sydney

N. F. Sciortino

The University of Sydney

C. J. Kepert

The University of Sydney

C. Frandsen

Danmarks Tekniske Universitet (DTU)

S. Mørup

Danmarks Tekniske Universitet (DTU)

S. Piligkos

Kobenhavns Universitet

C. J. McKenzie

Syddansk Universitet

Chemistry - A European Journal

0947-6539 (ISSN) 1521-3765 (eISSN)

Vol. 21 16066-16072

Ämneskategorier

Polymerteknologi

DOI

10.1002/chem.201502547