Thermal transformations and stability of organometallic materials with electrical and optical properties: the case of polycrystalline cis-[Ir(CO)2Cl(C5H5N) |
| |
Authors: | Bergese P Bontempi E Dragonetti C Roberto D Ugo R Colombo I Depero L E |
| |
Affiliation: | Laboratorio di Strutturistica Chimica, Università di Brescia and INSTM UdR di Brescia, via Branze 38, 25123 Brescia, Italy. paolo.bergese@ing.unibs.it |
| |
Abstract: | In this paper the solid-state transformations under heating of cis-[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). |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|