عنوان

Photoluminescence, molecular structure, and electronic structure of dicyano silver(I) complexes:

Number

TLpq304356399

.Language of Text, Soundtrack etc

انگلیسی

Title Proper

Photoluminescence, molecular structure, and electronic structure of dicyano silver(I) complexes:

General Material Designation

[Thesis]

First Statement of Responsibility

M. A. Omary

Title Proper by Another Author

A new class of luminescent metal-metal-bonded exciplexes

Subsequent Statement of Responsibility

H. H. Patterson

Name of Publisher, Distributor, etc.

The University of Maine

Date of Publication, Distribution, etc.

1997

Specific Material Designation and Extent of Item

264

Dissertation or thesis details and type of degree

Ph.D.

Body granting the degree

The University of Maine

Text preceding or following the note

1997

Text of Note

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.

Chemistry

Pure sciences

Radiation

silver dicyanide

H. H. Patterson

M. A. Omary

Electronic name

p

[Thesis]

276903

a

Y