Thermal transformations and stability of organometallic materials with electrical and optical properties : the Case of polycrystalline cis-[Ir(CO)2Cl(C5H5N)]
Articolo
Data di Pubblicazione:
2005
Citazione:
Thermal transformations and stability of organometallic materials with electrical and optical properties : the Case of polycrystalline cis-[Ir(CO)2Cl(C5H5N)] / P. Bergese, E. Bontempi, C. Dragonetti, D. Roberto, R. Ugo, I. Colombo, L. E. Depero. - In: JOURNAL OF PHYSICAL CHEMISTRY. B, CONDENSED MATTER, MATERIALS, SURFACES, INTERFACES & BIOPHYSICAL. - ISSN 1520-6106. - 109:2(2005), pp. 711-715. [10.1021/jp047817p]
Abstract:
In this paper the solid-state transformations under heating of ds-[Ir(CO)2Cl(C5H5N)] are discussed. The complexity of the transformations was revealed by integrating infrared spectroscopy, conventional and bidimensional X-ray diffraction, thermal analysis, and hot stage optical microscopy. During heating anisotropic expansion of the lattice along the Ir-Ir stacking takes place. Then cis-[Ir(CO)2Cl(C5H5N)] undergoes an irreversible solid-solid phase transition to a lattice of higher symmetry followed by a reversible transition into the amorphous phase. Under proper cooling a partial recrystallization takes place. Experiments in the presence of oxygen must be carried out in short time periods to avoid oxidation from Ir(I) to Ir(III).
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
P. Bergese, E. Bontempi, C. Dragonetti, D. Roberto, R. Ugo, I. Colombo, L.E. Depero
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