Reversible luminescence thermochromism in dipotassiumsodium tris[dicyanoargentate(I)] and the role of structural phase transitions

Fischer, P., Lucas, B., Omary, M. A., Larochelle, C. L. and Patterson, H. H. (2002) Reversible luminescence thermochromism in dipotassiumsodium tris[dicyanoargentate(I)] and the role of structural phase transitions. Journal of Solid State Chemistry, 168 1: 267-274. doi:10.1006/jssc.2002.9721


Author Fischer, P.
Lucas, B.
Omary, M. A.
Larochelle, C. L.
Patterson, H. H.
Title Reversible luminescence thermochromism in dipotassiumsodium tris[dicyanoargentate(I)] and the role of structural phase transitions
Journal name Journal of Solid State Chemistry   Check publisher's open access policy
ISSN 0022-4596
Publication date 2002-10
Sub-type Article (original research)
DOI 10.1006/jssc.2002.9721
Volume 168
Issue 1
Start page 267
End page 274
Total pages 8
Place of publication United States
Publisher Academic Press Inc
Collection year 2002
Language eng
Subject C1
240599 Classical Physics not elsewhere classified
780102 Physical sciences
0299 Other Physical Sciences
Abstract As a function of temperature, the layered compound K2Na[Ag(CN)213 displays dramatic variations in luminescence thermochromism with major trend changes occurring around 80 K. In order to understand these interesting optical properties, high-resolution neutron diffraction investigations were performed on a polycrystalline sample of this material in the temperature range from 1.5 to 300 K, and previous synchrotron X-ray data of Larochelle et al. (Solid State Commun. 114, 155 (2000)) were reinterpreted. The corresponding significant structural changes were found to be continuous with an anomalous increase of the monoclinic c-lattice parameter with decreasing temperature, associated with slight reorientations of two inequivalent, approximately linear N-C-Ag-C-N units. In the whole temperature range, the crystal structure is monoclinic with the space group C2/m. Based on the structural results, the major luminescence thermochromism changes around 80 K are attributed to the dominance of a back energy transfer process from low- to high-energy excitons at high temperatures. (E) 2002 Elsevier Science (USA).
Keyword Chemistry, Inorganic & Nuclear
Chemistry, Physical
Luminescence Thermochromism
Phase Transitions
Temperature Dependence
Crystal Structure
Neutron And Synchrotron X-ray Diffraction
Neutron Powder Diffraction
Fluorescence Thermochromism
Photophysical Properties
Copper(i) Complexes
Excited-state
Ab-initio
Tetranuclear
Clusters
Halide
Cu4i4(pyridine)4
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mathematics and Physics
 
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