Naslov
Synthesis and structural analysis of cadmium dipicolinate coordination polymers and tetramers

Autori
Oliver, Clive L. ; Kukovec, Boris-Marko

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of abstracts ; Acta Crystallogr. A67 (2011) C319. / Gutierrez-Puebla, Enrique ; Martinez-Ripoll, Martin - Madrid : IUCr, 2011, C319-C319

Skup
XXII Congress and General Assembly of the International Union of Crystallography

Mjesto i datum
Madrid, Španjolska, 22.08.2011. - 30.08.2011

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
coordination; polymer; polymorph

Sažetak
Metal coordination polymers constructed with multi-carboxylate ligands have been extensively studied in supramolecular chemistry and materials chemistry due to their structural diversity and application in catalysis, ion exchange, adsorption, nonlinear optics, luminescence and magnetism. Dipicolinic acid, dipicH2, is a versatile chelating ligand which can interact with metal ions both in anionic and protonated form. It is widely used for the preparation of the various metal complexes. It displays a large number of coordination modes due to the position of its carboxylate groups and its nitrogen atom, with the potential to act as a bidentate, tridentate and/or bridging ligand. Here we report the hydrothermal preparation of two cadmium dipicolinate polymers and four tetramers. The two polymers have the formula [Cd2(H2O)3(dipic)2]n and are polymorphs of each other. The four tetramers can be classed into two groups of general formula [Cd2X(H2 O)4(dipic)(dipicH)]2·2H2O and [Cd2X2(H2O)3(dipicH)2]2·2H2O, where X = Cl or Br. The structures of the compounds have been elucidated by single X-ray diffraction and their thermal behaviour characterized by thermal gravimetry and differential scanning calorimetry. Using either the cadmium bromide or chloride salt in a 1:1 ratio with dipicolinic acid can lead to any of the above type of structures, indicating the importance of subtle differences in preparation conditions, e.g. concentration of reactants and duration of heating.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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