YERSIN, H and RIEDL, U (1995) EXTREME PRESSURE-INDUCED SHIFTS OF EMISSION ENERGIES IN M[AU(CN)(2)] AND M(2)[PT(CN)(4)]CENTER-DOT-NH(2)O - COMPOUNDS WITH LOW-DIMENSIONAL METAL-METAL INTERACTIONS. INORGANIC CHEMISTRY, 34 (7). pp. 1642-1645. ISSN 0020-1669,
Full text not available from this repository.Abstract
Emission properties of dicyanoaurates(I) and tetracyanoplatinates(II) are investigated under high hydrostatic pressure up to approximate to 20 kbar and approximate to 40 kbar, respectively, at T = 295 K. One observes pressure-induced red shifts of the emission energies, which are the largest values known for solid state compounds: Delta<(nu)over bar>/Delta p (cm(-1)/kbar) = -120 (Cs2Na[Au(CN)(2)](3)); -150 (Cs[Au(CN)(2)]); -300 ((E) over right arrow\\(c) over right arrow) and -250 ((E) over right arrow perpendicular to (c) over right arrow) (Li-2[Pt-(CN)(4)]. 4H(2)O). In the investigated pressure range the energy shifts are linear and no phase transition is observed. Interestingly, Li-2[Pt(CN)4]. 4H(2)O is a very particular compound of the series of tetracyanoplatinates(II). Using this material it is possible to tune the emission in the visible energy range continuously over more than 6000 cm(-1) by high pressure application up to 20 kbar. For both types of compounds, the reported large values of pressure induced shifts are related to low-dimensional metal-metal interactions. These interactions lead to the formation of electronic energy bands, delocalized free exciton states, and self-trapped states. The importance of such states for the emission properties of these compounds is also discussed.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | LINEAR DICYANO COMPLEXES; CESIUM DICYANOAURATE(I); ELECTRONIC-STRUCTURE; SINGLE-CRYSTALS; LUMINESCENCE; TL<AU(CN)2>; CS<AU(CN)2>; EXCITON; SPECTRA; |
| Depositing User: | Dr. Gernot Deinzer |
| Last Modified: | 19 Oct 2022 08:38 |
| URI: | https://pred.uni-regensburg.de/id/eprint/52685 |
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