Evidence of the participation of electronic excited states in the mechanism of positronium formation in substitutional Tb1-xEux(dpm)(3) solid solutions studied by optical and positron annihilation spectroscopies
| Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
|---|---|
| Data(s) |
05/11/2013
05/11/2013
2012
|
| Resumo |
Positronium formation in the bimary molecular solid solutions Tb1-xEux (dpm)(3) (dpm = dipivaloylmethanate) has been investigated. A strong linear correlation between the D-5(4) Tb(III) energy level excited state lifetime and the positronium formation probability has been observed. This correlation indicates that the ligand-to-metal charge transfer LMCT states act in both luminescence quenching and positronium formation inhibition, as previously proposed. A kinetic mechanism is proposed to explain this correlation and shows that excited electronic states have a very important role in the positronium formation mechanism. CNPq CNPq FAPEMIG FAPEMIG FAPESP FAPESP RENAMI (National Project) RENAMI (National Project) |
| Identificador |
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, CAMBRIDGE, v. 14, n. 28, pp. 9996-10007, FEB, 2012 1463-9076 http://www.producao.usp.br/handle/BDPI/40962 10.1039/c2cp40664k |
| Idioma(s) |
eng |
| Publicador |
ROYAL SOC CHEMISTRY CAMBRIDGE |
| Relação |
PHYSICAL CHEMISTRY CHEMICAL PHYSICS |
| Direitos |
openAccess Copyright ROYAL SOC CHEMISTRY |
| Palavras-Chave | #INTRAMOLECULAR ENERGY-TRANSFER #CHARGE-TRANSFER STATES #LIFETIME SPECTROSCOPY #QUENCHING REACTIONS #COMPLEXES #CHEMISTRY #INHIBITION #LIQUIDS #IONS #SPUR #CHEMISTRY, PHYSICAL #PHYSICS, ATOMIC, MOLECULAR & CHEMICAL |
| Tipo |
article original article publishedVersion |
