Autoensamblaje de un cuadrado supramolecular a partir del complejo [Ni(dppe)(TOF)2] con 4,4’-Bipiridina
Self-assembly of a supramolecular square between [Ni(dppe)(TOF)2] and 4,4'-Bipyridine
Keywords:
Compuesto de coordinación de níquel(II), dppe, 4,4'-bipiridina, auto-ensamblaje, cuadrado supramolecular (es)nickel(II) coordination complex, dppe, 4,4'-bipyridine, self-assembly, Supramolecular square (en)
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El interés principal de esta investigación, es contribuir al desarrollo y comprensión de la química supramolecular y de las arquitecturas moleculares, construidas mediante el autoensamblaje de entidades complementarias. Por lo cual se realizó, la síntesis y caracterización (UV, FT-IR, Raman, análisis elemental, RMN 1H, 31P, 19F, COSY 1H-1H) de un cuadrado supramolecular de níquel (II) [7]. Este proceso se realizó, a partir de la síntesis del complejo inicial: [Ni(dppe)Cl2] [3], el cual fue sintetizado entre el cloruro de níquel [1] y difenilfosfino etano (dppe) [2]. Luego se realizó la síntesis del complejo de interés: [Ni(dppe)(TOF)2] [5], entre el complejo [3] y el trifluorometanosulfonato de plata (Ag-TOF) [4]. Finalmente el proceso de autoensamblaje se realizó entre el complejo [5] y el ligando orgánico 4,4’-bipiridina [6], los cuales actúan como vértice y arista respectivamente, en la estructura del cuadrado.
De acuerdo a los diferentes análisis realizados, se encontró que el autoensamblaje generó una única especie supramolecular, siendo la especie cuadrada, la estructura termodinámica más probable.The main interest of this research is to contribute to the development and understanding of supramolecular chemistry and molecular architectures, which are constructed by the self-assembly of supramolecular entities. Therefore, the synthesis and characterization (IR, UV, 1H NMR, 31P, 19F, 1H-1H COSY) of a nickel (II) supramolecular square [7] was performed through the synthesis between nickel chloride [1] and diphenylphosphinoethane (dppe) [2] to form the precursor complex [Ni(dppe)Cl2] [3]. This was followed by the synthesis of the complex of interest, [Ni(dppe)(TOF)2] [5], using the precursor and silver trifluoromethanesulfonate (Ag-TOF). Finally, the self-assembly was performed between the complex [1,2-bis(diphenylphosphinoethane)bistriflatonickel(II)] [Ni(dppe)(OSO2CF3)2] [5] and the organic ligand 4,4'-bipyridine [6], which act as vertex and edge, respectively.
According to various analyses, it was found that the self-assembly generated only one supramolecular species; a square is the most probable thermodynamic structure.
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