Ultrafast Studies of Electron and Energy Transfer in Polynuclear Ruthenium Based Complexes

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Material Information

Title:
Ultrafast Studies of Electron and Energy Transfer in Polynuclear Ruthenium Based Complexes
Physical Description:
1 online resource (162 p.)
Language:
english
Creator:
Yamazaki, Shiori
Publisher:
University of Florida
Place of Publication:
Gainesville, Fla.
Publication Date:

Thesis/Dissertation Information

Degree:
Doctorate ( Ph.D.)
Degree Grantor:
University of Florida
Degree Disciplines:
Chemistry
Committee Chair:
KLEIMAN,VALERIA DANA
Committee Co-Chair:
BOWERS,CLIFFORD RUSSELL
Committee Members:
VEIGE,ADAM S
POLFER,NICOLAS CAMILLE
CRISALLE,OSCAR DARDO

Subjects

Subjects / Keywords:
dimer -- et -- monomer -- ruthenium -- spectroscopy -- ta
Chemistry -- Dissertations, Academic -- UF
Genre:
Chemistry thesis, Ph.D.
bibliography   ( marcgt )
theses   ( marcgt )
government publication (state, provincial, terriorial, dependent)   ( marcgt )
born-digital   ( sobekcm )
Electronic Thesis or Dissertation

Notes

Abstract:
Polypyridyl Ruthenium based compounds can play a role of light-harvestingantennas due to their attractive photochemical and photophysical properties,namely, high chemical and photochemical stability, metal-to-ligand chargetransfer (MLCT) absorption in the visible region, and strong and relativelylong-lived luminescence from the triplet MLCT state. These complexes can applyto variety of devices because they work as the units of the multimetallic arraysupramolecular species and can be functionalized by displacing ligands orwiring additional units. This Ph.D. dissertation discusses photophysical propertiesof monomers RuII(bpy)(L)CN- and RuII(bpy)(L)NCS-,and dimers Ru(L)(bpy)(µ-NC)(M)(CN)5n- where bpy=2,2'bipyridine; M=RuII, FeII, FeIII, and CrIII;L = tpy (2,2'-6',2''-terpyridine), or tpm (tris(1-pyrazolil)methane); and ndepends on the metal. The research focus is to understand energy and/orelectron transfer from RuII moiety to a second metal center (M)through cyanide bridge because cyanide bridge can increase coupling betweenmetals to enhance energy and electron transfer. Particularly, we studied (i)the effect of additional metal center and (ii) the geometric effects to energyand electron transfer by the exchange of one of the RuII ligands(L). Time-resolved measurement was employed to explore the excited-statedynamics of these complexes undergo electron/energy transfer from the RuIIcenter to the FeII, FeIII, or CrIII center,demonstrating that these processes occur in 0.7 to 24 ps depending on thenature of the acceptor and the orientation of the ligand involved in thephotoinduced MLCT transition.
General Note:
In the series University of Florida Digital Collections.
General Note:
Includes vita.
Bibliography:
Includes bibliographical references.
Source of Description:
Description based on online resource; title from PDF title page.
Source of Description:
This bibliographic record is available under the Creative Commons CC0 public domain dedication. The University of Florida Libraries, as creator of this bibliographic record, has waived all rights to it worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law.
Statement of Responsibility:
by Shiori Yamazaki.
Thesis:
Thesis (Ph.D.)--University of Florida, 2013.
Local:
Adviser: KLEIMAN,VALERIA DANA.
Local:
Co-adviser: BOWERS,CLIFFORD RUSSELL.
Electronic Access:
RESTRICTED TO UF STUDENTS, STAFF, FACULTY, AND ON-CAMPUS USE UNTIL 2014-12-31

Record Information

Source Institution:
UFRGP
Rights Management:
Applicable rights reserved.
Classification:
lcc - LD1780 2013
System ID:
UFE0046233:00001