Abstract

SANCHEZ VERGARA, M. Elena; GOMEZ LARA, Jacobo; GARCIA MONTALVO, Verónica  and  ORTIZ REBOLLO, Armando. Nuevos compuestos semiconductores: Síntesis, caracterización y estudio comparativo del comportamiento eléctrico de macrociclos de Niquel(II) del tipo [Ni(C₁₇H₂₅N₄OL](PF₆)₂ con L = NH(CH₂)₂NH₂, NH(CH₂)₄NH₂, NH(CH₂)₁₂NH₂, NHC₁₄H₆(O₂)NH₂. Rev. Soc. Quím. Méx [online]. 2000, vol.44, n.2, pp.128-133. ISSN 0583-7693.

The synthesis and study of the electrical and optical properties of compounds [Ni(C 1₇H₂₅N4OL)](PF₆)₂ with L = NH (CH₂)₂NH₂, NH(CH₂)₄NH₂, NH(CH₂)₁₂NH₂, NHC₁₄H₆O₂NH₂ (Jäger type) are reported here. They were synthesized from [Ni(C₁₈H₂₈N₄ O₂)](PF₆)₂ (1) and the corresponding bidentate amines and characterized by IR and UV-Vis spectroscopy, elemental analyses, magnetic susceptibility and powder X-Ray diffraction. The compounds are diamagnetic and exhibit the expected d-d transition for a square planar geometry at the Ni(II) in the UV-Vis spectra. The IR results indicate that L is bonded to the macrocycles only through one extreme of the amine group. Additionally, the study of the electrical properties reveal that the behavior of the synthesized material corresponds to a semiconductor. The electrical magnitudes are within the range of the common values reported for this type of compounds. The activation energies are associated with the required energies for delocalizing electrons, while the forbidden energies wide bands get values from 1.5 up to 2.49 eV.

Keywords : Nickel (II); semiconductors; macrocycles.

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