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Massignani, Sara (2014) Auto-assemblaggio di Nuovi Polimeri di Coordinazione Basati sull’Unita' Trinucleare [Cu3(µ3-OH)(µ-pz)3]2+ (pz= ione pirazolato) e Mono- o Bicarbossilati. [Magistrali biennali]

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The self-assembling of CuII ions, pyrazole (Hpz), and mono- or bicarboxylate anions lead to different Coordination Polymers (CPs), mainly based on the triangular trinuclear cluster [Cu3(3-OH)(-Pz)3]2+. Using uncommon monocarboxylate ions, such as benzoate (Bnz), phenylacetate (Phac), phenylpropionate (Phpr), phenylacrylate (Phar) and vinylacetate (Vnac), new trinuclear and one mononuclear compounds were obtained. They were characterized by elemental analysis, IR spectroscopy and room temperature magnetic susceptibility measurement. The structures of the trinuclear CPs made with Phac and Phpr and of the mononuclear product with Bnz ion were identified by SC-XRD, whereas only cell parameters were found for the other compounds. In particular [Cu3(µ3-OH)(µ-pz)3(Phpr)2(Hpz)(H2O)]∙(H2O)x(MeOH)y shows a dodecanuclear cluster isolated for the first time in this work. The trinuclear compound obtained with Bnz anion has an interesting behavior in presence or in absence of solvent and it suggested the porosity of the framework. Using the terephthalate ion (Bdc), many trinuclear compounds were isolated employing different synthetic approaches. From the direct reaction of the terephthalate copper and Hpz even two mononuclear species were obtained, but they were already reported in licterature. Some new species were isolated from substitution reaction using [Cu3(µ3-OH)(µ-pz)3(CH3COO)2(Hpz)] e [Cu3(µ3-OH)(µ-pz)3(HCOO)2(Hpz)2(H2O)] and H2Bdc or Na2Bdc as reactants. In particular the diffusion method applied for the reaction of [Cu3(µ3-OH)(µ-pz)3(CH3COO)2(Hpz)] and Na2Bdc produced [Cu3(µ3-OH)(µ-pz)3(Bdc)(DMF)2] characterized by SC-XRD. The structure shows the formation of squared macrocycles which create a 2D network. Unfortunately adiacent networks are offset and so no pores and cavities are present.

Item Type:Magistrali biennali
Uncontrolled Keywords:MOF, CuII, pyrazole, carboxylates, terephthalate, substitution reaction
Subjects:Area 03 - Scienze chimiche > CHIM/03 Chimica generale e inorganica
Area 09 - Ingegneria industriale e dell'informazione > ING-IND/22 Scienza e tecnologia dei materiali
Codice ID:45295
Relatore:Pandolfo, Luciano
Data della tesi:13 March 2014
Biblioteca:Polo di Scienze > Dip. di Scienze Chimiche - Biblioteca
Collocazione:Tesi 3771
Note per la fruizione:La copia a stampa della tesi e' disponibile presso la biblioteca con la collocazione indicata
Tipo di fruizione per il documento:consultazione / prestito / riproduzione
Tesi sperimentale (Si) o compilativa (No)?:Yes

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