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Exciplex tuning and optical memory s...

Hettiarachchi, Samanthika Ruvinie.

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Exciplex tuning and optical memory studies for dicyanoargentate(I) and dicyanoaurate(I) ions doped in potassium chloride crystals. Extension to mixed metal gold and silver systems.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Exciplex tuning and optical memory studies for dicyanoargentate(I) and dicyanoaurate(I) ions doped in potassium chloride crystals. Extension to mixed metal gold and silver systems./
Author:	Hettiarachchi, Samanthika Ruvinie.
Description:	228 p.
Notes:	Adviser: Howard H. Patterson.
Contained By:	Dissertation Abstracts International63-12B.
Subject:	Chemistry, Analytical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3074229
ISBN:	0493941231

Exciplex tuning and optical memory studies for dicyanoargentate(I) and dicyanoaurate(I) ions doped in potassium chloride crystals. Extension to mixed metal gold and silver systems.
Hettiarachchi, Samanthika Ruvinie.

Exciplex tuning and optical memory studies for dicyanoargentate(I) and dicyanoaurate(I) ions doped in potassium chloride crystals. Extension to mixed metal gold and silver systems. - 228 p.

Adviser: Howard H. Patterson.

Thesis (Ph.D.)--University of Maine, 2002.

Exciplex tuning and optical memory behavior of [Ag(CN)2−] and [Au(CN)2<super>−</super>] ions doped in KCl host crystals, pure KAg(CN)2, and pure KAu(CN)2 have been studied. Additionally, d<super>10</super>-d<super>10</super> (KAu(CN)2-KAg(CN) 2) and d<super>10</super>-d<super>8</super> (KAu(CN)2, KAg(CN) 2-K2Pt(CN)4) mixed metal systems have been synthesized and characterized.

ISBN: 0493941231Subjects--Topical Terms:

586156
Chemistry, Analytical.

Exciplex tuning and optical memory studies for dicyanoargentate(I) and dicyanoaurate(I) ions doped in potassium chloride crystals. Extension to mixed metal gold and silver systems.
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020 $a 0493941231
035 $a (UnM)AAI3074229
035 $a AAI3074229
040 $a UnM $c UnM
100 1 $a Hettiarachchi, Samanthika Ruvinie. $3 1256893
245 1 0 $a Exciplex tuning and optical memory studies for dicyanoargentate(I) and dicyanoaurate(I) ions doped in potassium chloride crystals. Extension to mixed metal gold and silver systems.
300 $a 228 p.
500 $a Adviser: Howard H. Patterson.
500 $a Source: Dissertation Abstracts International, Volume: 63-12, Section: B, page: 5835.
502 $a Thesis (Ph.D.)--University of Maine, 2002.
520 $a Exciplex tuning and optical memory behavior of [Ag(CN)2−] and [Au(CN)2<super>−</super>] ions doped in KCl host crystals, pure KAg(CN)2, and pure KAu(CN)2 have been studied. Additionally, d<super>10</super>-d<super>10</super> (KAu(CN)2-KAg(CN) 2) and d<super>10</super>-d<super>8</super> (KAu(CN)2, KAg(CN) 2-K2Pt(CN)4) mixed metal systems have been synthesized and characterized.
520 $a Several ultraviolet and visible emission bands are observed for [Ag(CN) 2<super>−</super>] and [Au(CN)2<super>−</super>] ions doped in KCl host crystals. Each emission band becomes dominant at a characteristic excitation wavelength: that is the energy of the emission can be tuned by site-selective spectroscopy. Luminescence, Raman and theoretical results suggest the formation of Au-Au and Ag-Ag bonded excimers and exciplexes between adjacent [Ag(CN)2<super>−</super>] and [Au(CN) 2<super>−</super>] ions in the host lattice. The emission and Raman bands are assigned to different [Ag(CN)2<super>−</super>] n and [Au(CN)2<super>−</super>]n exciplexes. These results give rise to a new optical phenomenon called “exciplex tuning”.
520 $a When a single crystal of [Ag(CN)2<super>−</super>]/KCl at 77 K is irradiated with 266 nm laser light, the intensity of the high energy peak at 338 nm is increased with increasing exposure time and, concurrently, the intensity of the low energy peak at 415 nm is decreased. This process is reversible, that is, heating the crystal to room temperature restores the crystal to its original state. This phenomena of “optical memory” and erasure of the optical memory has been studied for both [Ag(CN)2 <super>−</super>] ions and [Au(CN)2<super>−</super>] ions doped with varying concentrations in KCl as well as with pure KAg(CN) 2 and pure KAu(CN)2 single crystals.
520 $a The d<super>10</super>-d<super>10</super> mixed metal system (KAu(CN) 2-KAg(CN)2) shows Ag-Au delocalization in the lowest energy excited electronic state. Observed luminescence in this d<super>10</super>-d<super> 10</super> mixed system is strongly tunable; that is, the emission energy of this system can be tuned by varying physical parameters such as excitation wavelength, temperature, and the Ag/Au ratio.
520 $a The d<super>10</super>-d<super>8</super> mixed metal system (KAu(CN) 2, KAg(CN)2-K2Pt(CN)4) represents an example of energy transfer between d<super>10</super> and d<super>8</super> systems. In other words, the lowest excited state energy of KAu(CN)2 or KAg(CN)2 can be transferred to the lowest excited state of K2Pt(CN)4).
590 $a School code: 0113.
650 4 $a Chemistry, Analytical. $3 586156
650 4 $a Chemistry, Inorganic. $3 517253
690 $a 0486
690 $a 0488
710 2 0 $a University of Maine. $3 1253247
773 0 $t Dissertation Abstracts International $g 63-12B.
790 $a 0113
790 1 0 $a Patterson, Howard H., $e advisor
791 $a Ph.D.
792 $a 2002
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3074229