Unidirectional growth of organic nonlinear optical l-arginine maleate dihydrate single crystal by Sankaranarayanan–Ramasamy (SR) method and its characterization

Charoen-In, Urit; Ramasamy, P.; Manyum, P.

doi:10.1016/j.jcrysgro.2010.11.001

Cited by 16 publications

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References 30 publications

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“…À(Anbuchezhiyan et al, 2009;Devaprasad & Madhavan, 2010; Yogam et al, 2012), (l-HisH)ÁM À(Gonsago et al, 2012), (l-ArgH)ÁM À ÁH 2 O(Vasantha & Dhanuskodi, 2004;Mallik & Kar, 2005;Kalaiselvi et al, 2008;Sun et al, 2008;Baraniraj & Philominathan, 2010;Charoen-In et al, 2011; Vasudevan et al, 2013) and l-MetÁl-MetHÁM À…”

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confidence: 99%

New hydrophobicL-amino acid salts: maleates ofL-leucine,L-isoleucine andL-norvaline

et al. 2015

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Crystals of maleates of three amino acids with hydrophobic side chains [L-leucenium hydrogen maleate, C6H14NO2(+)·C4H3O4(-), (I), L-isoleucenium hydrogen maleate hemihydrate, C6H14NO2(+)·C4H3O4(-)·0.5H2O, (II), and L-norvalinium hydrogen maleate-L-norvaline (1/1), C5H11NO2(+)·C4H3O4(-)·C5H12NO2, (III)], were obtained. The new structures contain C2(2)(12) chains, or variants thereof, that are a common feature in the crystal structures of amino acid maleates. The L-leucenium salt is remarkable due to a large number of symmetrically non-equivalent units (Z' = 3). The L-isoleucenium salt is a hydrate despite the fact that L-isoleucine is a nonpolar hydrophobic amino acid (previously known amino acid maleates formed hydrates only with lysine and histidine, which are polar and hydrophilic). The L-norvalinium salt provides the first example where the dimeric cation L-Nva...L-NvaH(+) was observed. All three compounds have layered noncentrosymmetric structures. Preliminary tests have shown the presence of the second harmonic generation (SGH) effect for all three compounds.

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