Bis(diimine)nickelcomplexes [diimine = 2,3-diiminonaphthalene (din) and 9,10-diiminophenanthrene (dip)] have been prepared by oxidation of a solution of Ni2+ and the appropriate diamine. The complexes were studied by UV-vis spectroscopy and compared with the well-known bis(o-phenylenediimine)nickelcomplex. Oxidation with iodine gave Ni(din)2Ix and Ni(dip)2Ix (where x = 0.13–3.30). Thermogravimetric analyses (TGA) provided quantitative information on the iodine content. Weight losses at 100°C were observed for highly iodinated compounds involving the decomposition of I5− to I3− and for all species above 260°C. Raman and IR spectroscopy were used to characterize the iodine-doped complexes. The Raman spectra showed strong scattering attributable to I3− (107 cm−1) and 15− (160 cm−1), the latter only for highly iodinatedcomplexes. The conductivity of iodine-doped materials was studied by using linear two-probe (300 K) and variable temperature (77–300 K) van der Pauw methods on pressed pellets. The conductivity is thermally activated, with an apparent activation energy of 0.25 and 0.075 eV for Ni(din)2Ix and Ni(dip)2Ix, respectively. A large increase of the conductivity for more extended molecules is observed.

Chemical, spettroscopic and electrical conduction properties of iodinated nickel diimine complexes / Lelj, F.; Morelli, G.; Ricciardi, G.; Brigatti, Maria Franca; Rosa, A.. - In: POLYHEDRON. - ISSN 0277-5387. - STAMPA. - 8:(1989), pp. 2603-2610. [10.1016/S0277-5387(00)81163-8]

Chemical, spettroscopic and electrical conduction properties of iodinated nickel diimine complexes

BRIGATTI, Maria Franca;
1989

Abstract

Bis(diimine)nickelcomplexes [diimine = 2,3-diiminonaphthalene (din) and 9,10-diiminophenanthrene (dip)] have been prepared by oxidation of a solution of Ni2+ and the appropriate diamine. The complexes were studied by UV-vis spectroscopy and compared with the well-known bis(o-phenylenediimine)nickelcomplex. Oxidation with iodine gave Ni(din)2Ix and Ni(dip)2Ix (where x = 0.13–3.30). Thermogravimetric analyses (TGA) provided quantitative information on the iodine content. Weight losses at 100°C were observed for highly iodinated compounds involving the decomposition of I5− to I3− and for all species above 260°C. Raman and IR spectroscopy were used to characterize the iodine-doped complexes. The Raman spectra showed strong scattering attributable to I3− (107 cm−1) and 15− (160 cm−1), the latter only for highly iodinatedcomplexes. The conductivity of iodine-doped materials was studied by using linear two-probe (300 K) and variable temperature (77–300 K) van der Pauw methods on pressed pellets. The conductivity is thermally activated, with an apparent activation energy of 0.25 and 0.075 eV for Ni(din)2Ix and Ni(dip)2Ix, respectively. A large increase of the conductivity for more extended molecules is observed.
1989
8
2603
2610
Chemical, spettroscopic and electrical conduction properties of iodinated nickel diimine complexes / Lelj, F.; Morelli, G.; Ricciardi, G.; Brigatti, Maria Franca; Rosa, A.. - In: POLYHEDRON. - ISSN 0277-5387. - STAMPA. - 8:(1989), pp. 2603-2610. [10.1016/S0277-5387(00)81163-8]
Lelj, F.; Morelli, G.; Ricciardi, G.; Brigatti, Maria Franca; Rosa, A.
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

Licenza Creative Commons
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/739282
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 8
  • ???jsp.display-item.citation.isi??? 7
social impact