TY - JOUR
T1 - A 2D [FeII-bistetrazole] coordination polymer exhibiting spin-crossover properties
AU - Quesada, Manuel
AU - Prins, Ferry
AU - Roubeau, Olivier
AU - Gamez, Patrick
AU - Teat, Simon J.
AU - van Koningsbruggen, Petra J.
AU - Haasnoot, Jaap G.
AU - Reedijk, Jan
PY - 2007/10/1
Y1 - 2007/10/1
N2 - The reaction of 1,3-bis(tetrazol-1-yl)-2-propanol (btzpol) with Fe(BF4)2 · 6H2O in acetonitrile yields the remarkable 2D coordination polymer [FeII(btzpol)1.8(btzpol-OBF3)1.2](BF4)0.8 · (H2O)0.8(CH3CN) (1). This compound has been structurally characterized using an X-ray single-crystal synchrotron radiation source. The iron(II) centers are bridged by means of double btzpol bridges along the c direction, and by single btzpol bridges along the b direction. The reaction of part of the ligand with the counterion has forced the compound to crystallize in this extended two dimensional structure. The compound shows spin-transition properties, both induced by temperature and light, with T½ = 112 K and T(LIESST) = 46 K, respectively. The relaxation of the metastable high-spin state created by irradiation is exponential, following an Arrhenius type behavior at high temperature, and dominated by a temperature independent tunneling process at lower temperatures.
AB - The reaction of 1,3-bis(tetrazol-1-yl)-2-propanol (btzpol) with Fe(BF4)2 · 6H2O in acetonitrile yields the remarkable 2D coordination polymer [FeII(btzpol)1.8(btzpol-OBF3)1.2](BF4)0.8 · (H2O)0.8(CH3CN) (1). This compound has been structurally characterized using an X-ray single-crystal synchrotron radiation source. The iron(II) centers are bridged by means of double btzpol bridges along the c direction, and by single btzpol bridges along the b direction. The reaction of part of the ligand with the counterion has forced the compound to crystallize in this extended two dimensional structure. The compound shows spin-transition properties, both induced by temperature and light, with T½ = 112 K and T(LIESST) = 46 K, respectively. The relaxation of the metastable high-spin state created by irradiation is exponential, following an Arrhenius type behavior at high temperature, and dominated by a temperature independent tunneling process at lower temperatures.
KW - iron(II)
KW - spin-transition
KW - azole ligands
KW - metal-organic framework
KW - LIESST
KW - relaxation
UR - http://www.sciencedirect.com/science/article/pii/S0020169306007687
U2 - 10.1016/j.ica.2006.12.010
DO - 10.1016/j.ica.2006.12.010
M3 - Article
SN - 0020-1693
VL - 360
SP - 3787
EP - 3796
JO - Inorganica Chimica Acta
JF - Inorganica Chimica Acta
IS - 13
ER -