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• W2030095026 endingPage "14853" @default.
• W2030095026 startingPage "14840" @default.
• W2030095026 abstract "The spin-crossover complex [Fe(LN5)(CN)2]·H2O (1, LN5 = 2,13-dimethyl-3,6,9-12,18-pentaazabicyclo[12.3.1]octadeca-1(18),2,12,14,16-pentaene), reported previously by Nelson et al. in 1986, was reinvestigated, and its structure determined by single crystal X-ray diffraction for the first time. The reaction between [Mn(III)(saltmen)(H2O)](+) and this photomagnetic linker yielded the trinuclear molecular complex [{Mn(saltmen)}2FeHS(LN5)(CN)2](ClO4)2·0.5CH3OH (2) and the one-dimensional compound [{Mn(saltmen)}2FeLS(LN5)(CN)2](ClO4)2·0.5C4H10O·0.5H2O (3) depending on the addition order of the reagents (HS: High-Spin; LS: Low-Spin). Compound 3 exhibits a wave-shaped chain structure built from the assembly of the trinuclear [Mn(III)-NC-Fe(II)] motif found in 2. Static magnetic measurements revealed the existence of antiferromagnetic Mn(III)···Fe(II) (Fe(II) HS, S = 2) interactions in the trinuclear entity of 2 via the cyanido bridge leading to an ST = 2 ground state. In the case of 3, concomitant ferromagnetic and antiferromagnetic exchange interactions are found along the chain due to the presence of two crystallographically independent {Mn2(saltmen)2} units, which behave differently as shown by the magnetic susceptibility analysis, while the Fe(II) (LS, S = 0) cyanido-bridging moiety is isolating these dinuclear Mn(III) units. ac susceptibility experiments indicated slow relaxation of the magnetization arising from the ferromagnetically coupled [Mn2] units (τ0 = 1.1 × 10(-7) s and Δ(eff)/k(B) = 13.9 K). Optical reflectivity and photomagnetic properties of 1 and 3 have been investigated in detail. These studies reveal that the photomagnetic properties of 1 are kept after its coordination to the acceptor Mn(III)/saltmen complexes, allowing in 3 to switch on and off the magnetic interaction between the photoinduced Fe(II) HS unit (S = 2) and the Mn(III) ions. To the best of our knowledge, the compound 3 represents the first example of a coordination network of single-molecule magnets linked by spin-crossover units inducing thermally and photoreversible magnetic and optical properties." @default.
• W2030095026 created "2016-06-24" @default.
• W2030095026 creator A5000483947 @default.
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• W2030095026 date "2013-09-19" @default.
• W2030095026 modified "2023-10-13" @default.
• W2030095026 title "Rational Design of a Photomagnetic Chain: Bridging Single-Molecule Magnets with a Spin-Crossover Complex" @default.
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