TY - JOUR
T1 - Syntheses, crystal structures, spectroscopic and magnetic properties of two trinuclear iron complexes with carboxylate and oximate mixed-bridge ligands
AU - Feng, Qin
AU - Li, Bo
AU - Du, Ruizhi
AU - Jiang, Feng
AU - Liu, Tianfu
N1 - Publisher Copyright:
© 2018, Springer Nature Switzerland AG.
PY - 2019/1/31
Y1 - 2019/1/31
N2 - Two trinuclear oxo-centered iron(III) complexes [Fe 3 (μ 3 -O)Salox(L1) 5 (MeOH) 2 ] (1) and [Fe 3 (μ 3 -O)Salox(L1) 5 (EtOH) 2 ]·2EtOH·2H 2 O (2) (Salox = salicylaldoxime, L1 = o-nitrobenzoic acid) have been synthesized, and their X-ray crystal structures, spectroscopic properties (IR, UV–Vis, fluorescence), and magnetic properties have been characterized. In each complex, the three Fe(III) centers of the [Fe 3 O] moieties are joined together by a μ 3 -O unit to form an isosceles triangle, and each metal center has a distorted octahedral coordination geometry. The fluorescence emission intensities for the two complexes are much higher than those of the free proligands, suggesting that the [Fe 3 O] structural unit increases the rigidity of the ligands after coordination, and the enlarged conjugate system reduces the frontier orbitals energy gap. The nature of magnetic coupling within complexes 1 and 2 indicates both intramolecular strong and intermolecular weak antiferromagnetic interactions.
AB - Two trinuclear oxo-centered iron(III) complexes [Fe 3 (μ 3 -O)Salox(L1) 5 (MeOH) 2 ] (1) and [Fe 3 (μ 3 -O)Salox(L1) 5 (EtOH) 2 ]·2EtOH·2H 2 O (2) (Salox = salicylaldoxime, L1 = o-nitrobenzoic acid) have been synthesized, and their X-ray crystal structures, spectroscopic properties (IR, UV–Vis, fluorescence), and magnetic properties have been characterized. In each complex, the three Fe(III) centers of the [Fe 3 O] moieties are joined together by a μ 3 -O unit to form an isosceles triangle, and each metal center has a distorted octahedral coordination geometry. The fluorescence emission intensities for the two complexes are much higher than those of the free proligands, suggesting that the [Fe 3 O] structural unit increases the rigidity of the ligands after coordination, and the enlarged conjugate system reduces the frontier orbitals energy gap. The nature of magnetic coupling within complexes 1 and 2 indicates both intramolecular strong and intermolecular weak antiferromagnetic interactions.
UR - http://www.scopus.com/inward/record.url?scp=85051194051&partnerID=8YFLogxK
U2 - 10.1007/s11243-018-0268-7
DO - 10.1007/s11243-018-0268-7
M3 - Article
AN - SCOPUS:85051194051
SN - 0340-4285
VL - 44
SP - 49
EP - 55
JO - Transition Metal Chemistry
JF - Transition Metal Chemistry
IS - 1
ER -