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Cariati E, Macchi R, Roberto D, et al. Polyfunctional inorganic-organic hybrid materials: an unusual kind of NLO active layered mixed metal oxalates with tunable magnetic properties and very large second harmonic generation. J Am Chem Soc. 2007;129(30):9410-20doi: 10.1021/ja0710712.
Cariati, E., Macchi, R., Roberto, D., Ugo, R., Galli, S., Casati, N., Macchi, P., Sironi, A., Bogani, L., Caneschi, A., & Gatteschi, D. (2007). Polyfunctional inorganic-organic hybrid materials: an unusual kind of NLO active layered mixed metal oxalates with tunable magnetic properties and very large second harmonic generation. Journal of the American Chemical Society, 129(30), 9410-20. https://doi.org/10.1021/ja0710712
Cariati, Elena, et al. "Polyfunctional inorganic-organic hybrid materials: an unusual kind of NLO active layered mixed metal oxalates with tunable magnetic properties and very large second harmonic generation." Journal of the American Chemical Society vol. 129,30 (2007): 9410-20. doi: https://doi.org/10.1021/ja0710712
Cariati E, Macchi R, Roberto D, Ugo R, Galli S, Casati N, Macchi P, Sironi A, Bogani L, Caneschi A, Gatteschi D. Polyfunctional inorganic-organic hybrid materials: an unusual kind of NLO active layered mixed metal oxalates with tunable magnetic properties and very large second harmonic generation. J Am Chem Soc. 2007 Aug 01;129(30):9410-20. doi: 10.1021/ja0710712. Epub 2007 Jul 07. PMID: 17616190.
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J Am Chem Soc. 2007 Aug 01;129(30):9410-20. doi: 10.1021/ja0710712. Epub 2007 Jul 07.

Polyfunctional inorganic-organic hybrid materials: an unusual kind of NLO active layered mixed metal oxalates with tunable magnetic properties and very large second harmonic generation.

Journal of the American Chemical Society

Elena Cariati, Roberto Macchi, Dominique Roberto, Renato Ugo, Simona Galli, Nicola Casati, Piero Macchi, Angelo Sironi, Lapo Bogani, Andrea Caneschi, Dante Gatteschi

Affiliations

  1. Dipartimento di Chimica Inorganica, Metallorganica e Analitica, Università di Milano, Centro CIMAINA, UdR di Milano INSTM and Centro ISTM-CNR, Via Venezian 21, Milano, Italy. [email protected]

PMID: 17616190 DOI: 10.1021/ja0710712

Abstract

Mixed M(II)/M(III) metal oxalates, as "stripes" connected through strong hydrogen bonding by para-dimethylaminobenzaldeide (DAMBA) and water, form an organic-inorganic 2D network that enables segregation in layers of the cationic organic NLO-phore trans-4-(4-dimethylaminostyryl)-1-methylpyridinium, [DAMS+]. The crystalline hybrid materials obtained have the general formula [DAMS]4[M2M'(C2O4)6].2DAMBA.2H2O (M = Rh, Fe, Cr; M' = Mn, Zn), and their overall three-dimensional packing is non-centrosymmetric and polar, therefore suitable for second harmonic generation (SHG). All the compounds investigated are characterized by an exceptional SHG activity, due both to the large molecular quadratic hyperpolarizability of [DAMS+] and to the efficiency of the crystalline network which organizes [DAMS+] into head-to-tail arranged J-type aggregates. The tunability of the pairs of metal ions allows exploiting also the magnetic functionality of the materials. Examples containing antiferro-, ferro-, and ferri-magnetic interactions (mediated by oxalato bridges) are obtained by coupling proper M(III) ions (Fe, Cr, Rh) with M(II) (Mn, Zn). This shed light on the role of weak next-nearest-neighbor interactions and main nearest-neighbor couplings along "stripes" of mixed M(II)/M(III) metal oxalates of the organic-inorganic 2D network, thus suggesting that these hybrid materials may display isotropic 1D magnetic properties along the mixed M(II)/M(III) metal oxalates "stripes".

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