IR-Active Matrix-Isolated Molecules (CO and CO2) to Probe Host Crystal (N2) Quality

Autor:	Matthias Jordan, and Alexander P. Brodyanski, H. J. Jodl, Martin Vetter
Rok vydání:	2000
Předmět:	Solid-state physics Chemistry Matrix isolation Spectral line Amorphous solid Active matrix law.invention Chemical physics law Impurity Crystal field theory Condensed Matter::Superconductivity Physical and Theoretical Chemistry Thin film
Zdroj:	The Journal of Physical Chemistry A. 104:3698-3711
ISSN:	1520-5215 1089-5639
DOI:	10.1021/jp993845+
Popis:	The matrix isolation technique is a powerful technique for specific questions. But due to relatively high impurity concentrations (10-2−10-4) the impurity is not in a real matrix-isolated case, as in theoretical descriptions. In addition, due to sample preparation (cold deposition) the matrix resembles more an amorphous thin film rather than a good crystal, in terms of solid state physics. As a consequence, many spectroscopic data or phenomena were misinterpreted in the past. Therefore, we studied the real matrix-isolated case (∼10-7) in pretty good bulk matrix material. Looking at impurity spectra (CO, CO2, and their isotopes) and analyzing bandwidths, frequencies, and intensities as a function of temperature, we could characterize the quality of structural phase transitions of matrix and its hysteresis; we could unambiguously assign crystal field splitting to orientations of matrix-isolated particles in the host crystal; we could separate homogeneous from inhomogeneous bandwidth and discuss crystal qual...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2559fe1a436e79c2c66b2bd6f72aac08 https://doi.org/10.1021/jp993845+ Zobrazit plný text záznamu