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    Synthesis and structural X-ray analysis of 1,1?-(naphthalene-1,8-diyl)-3,3?-dibenzoyl-bisthiourea and its use as anion-binding receptor
    (Tubitak Scientific & Technological Research Council Turkey, 2012) Aydin, Fatma; Tunoglu, Nazan; Aykac, Dogan; Arslan, Nahide Burcu; Kazak, Canan
    A novel artificial receptor, 1,1'-(naphthalene-1,8-diyl)-3,3'-dibenzoyl-bisthiourea, based on a 1,8-naphthalene skeleton bearing bisthiourea groups was prepared and characterized by IR and H-1-NMR, C-13-NMR, and MS spectroscopic techniques. The compound proved to be an efficient and selective naked-eye detector for the fluoride, cyanide, and hydroxide ions in DMSO. The crystal structure of the title compound was examined by using X-ray crystallographic techniques and found to be crystallized in the monoclinic space group P - 1 with the unit cell parameters: a = 8.1556(8) angstrom, b = 12.0127(11) angstrom, c = 13.2081(11) angstrom, alpha = 109.510(7)degrees, beta = 95.390(7)degrees, gamma = 103.660(7)degrees, Z = 2. The intramolecular N-H center dot center dot center dot O hydrogen bonding interactions between the N-H and the oxygen atom of C=O groups support a 1,1'-(naphthalene-1,8-diyl)3,3'-dibenzoyl-bisthiourea framework. Moreover, the combinations of N-H center dot center dot center dot S bonds produce R-2(2) (8) rings.
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    Öğe
    Synthesis of Two Novel Aroyl Thioureas and Their Use as Anion Binding Receptors
    (Asian Journal Of Chemistry, 2013) Aydin, Fatma; Tunoglu, Nazan; Aykac, Dogan
    New aroyl thioureas; N-nicotinoyl-N'-(4-nitrophenyl) thiourea (3a) and N-nicotinoyl-N'-(2-nitrophenyl) thiourea (3b) were synthesized and studied as anion-binding receptors. Upon adding tetrabutyl ammonium halides (fluoride, chloride bromide and iodide), cyanide and hydroxide ions to their solutions in DMSO respectively, the colour of the solutions has shown striking changes from pale yellow to brillant yellow or red. The binding effects of the anions were investigated by UV-VIS spectroscopic method and H-1 NMR titrations.