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12 June 2006 Optically active molecular magnets
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Proceedings Volume 5946, Optical Materials and Applications; 59460K (2006)
Event: Optical Materials and Applications, 2005, Tartu, Estonia
We describe the synthesis of two-dimensional {[MnIICrIII(C2O4)3]C} bimetallic networks that include as template cations C stilbazolium salts 4-[4-(N,N-dimethylamino)-α-styryl]-N-alkylpyridinium with alkyl = methyl (DAMS), 4-[4-methoxy- α-styryll-N-isopentylpyridinium (MIPS), and DAZOP, which is a DAMS analogue with the central [C=C] core replaced by an azo N=N] moiety. These networks are obtained in their optically active forms, using the resolved - or Λ- [CrIII(C204)3]3- anionic bricks as chiral-inducing reagents. The UV-visible properties of the networks and their natural circular dichroism (Cotton effects) demonstrate that the MIPS, DAZOP, and DAMS become chiral in [MnIICrIII (C204)3]- anionic matrices. The absolute configurations of the template cations inside the anionic framework depend on the configuration of the starting anionic reagent.
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Michel Gruselle, Bernard Malézieux, Cyrille Train, Carine Guyard-Duhayon, René Clément, Sophie Bénard, Patrick Gredin, and Kaia Tonsuaadu "Optically active molecular magnets", Proc. SPIE 5946, Optical Materials and Applications, 59460K (12 June 2006);

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