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" Photoluminescence, molecular structure, and electronic structure of dicyano silver(I) complexes: "
M. A. Omary
H. H. Patterson
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Latin Dissertation
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| Language of Document
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English
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| Record Number
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1113318
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TLpq304356399
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| Main Entry
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H. H. Patterson
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M. A. Omary
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| Title & Author
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Photoluminescence, molecular structure, and electronic structure of dicyano silver(I) complexes:\ M. A. OmaryH. H. Patterson
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| College
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The University of Maine
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| Date
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1997
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| student score
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1997
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| Degree
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Ph.D.
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| Page No
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264
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| Abstract
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The photophysical behavior, molecular structure, and electronic structure of pure and mixed crystals of dicyano silver (I) complexes have been studied. The pure crystals studied are usd\rm Tl\lbrack Ag(CN)\sb2\rbrack,\ Na\lbrack Ag(CN)\sb2\rbrack, K\lbrack Ag(CN)\sb2\rbrack,\ Cs\lbrack Ag(CN)\sb2\rbrack,\ Rb\lbrack Ag(CN)\sb2\rbrack,\ Ca\lbrack Ag(CN)\sb2\rbrack,\ Sr\lbrack Ag(CN)\sb2\rbrack\sb2,\ and\ (n\rm Bu)\sb4\lbrack Ag(CN)\sb2\rbrack.usd Also, mixed crystals comprised of usd\rm\lbrack Ag(CN)\sb2\sp{-}\rbrackusd ions doped into the alkali halide crystals KCl and NaCl have been studied. The results indicate the importance of closed-shell silver-silver interactions, called argentophilicity. These interactions have been shown to be weak in the ground state but very strong in the first excited state. All the crystals studied give rise to the formation of luminescent excimers and exciplexes as a result of excited state silver-silver interactions. These species represent a new class of metal-metal bonded exciplexes in inorganic chemistry. They are also the first reported metal-metal bonded exciplexes in the solid state. An interesting new phenomenon in optical spectroscopy has been discovered in the mixed crystals studied in this thesis. The new phenomenon has been called exciplex tuning. It refers to the tuning of the luminescence by the formation of different exciplexes with a formula of usd\rm\sp*\lbrack Ag(CN)\sb2\sp{-}\rbrack\sb {n}.usd Tuning has been achieved by simple and convenient methods over a broad range in the ultraviolet and visible regions. The findings in this thesis might lead to the development of new laser and photoconducting materials.
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Chemistry
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Pure sciences
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Radiation
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silver dicyanide
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