Synthesis of new substituted benzaldazine derivatives, hydrogen bonding-induced supramolecular structures and luminescent properties - 13/01/12

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Abstract |
Syntheses of three benzaldazine compounds 1–3 with the general formula Ar1(CH=N–N=HC)Ar2 (Ar1=Ar2=2-OH-3,5-tBu2C6H2 (1), Ar1=Ar2=2-BrC6H4 (2), Ar1=ortho-C6H4(NHC6H3-Me2-2,6), Ar2=C6H4F-2 (3)) are described. All compounds were characterized by elemental analysis, 1H NMR, 13C NMR, IR spectroscopy and single-crystal X-ray crystallography. The different supramolecular structures were obtained through different weak interactions (C−H···O, O−H···N and π···π interactions for 1; C−H···Br and Br···Br interactions for 2; C−H···F and C−H···N interactions for 3). Compound 1 shows solvent-dependent fluorescent properties with blue to green emission on the increasing of the solvent polarity. Compounds 2, 3 show blue photoluminescence in different solvents.
Le texte complet de cet article est disponible en PDF.Keywords : Schiff base, Salicylaldehyde, Hydrogen bonding, Hydrazine hydrate, Luminescence
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