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The 3rd edition of this textbook offers clear explanations of
optical spectroscopic phenomena and shows how spectroscopic
techniques are used in modern chemistry, biochemistry and
biophysics. Topics included are: electronic and vibrational
absorption fluorescence symmetry operations and normal-mode
calculations electron transfer from excited molecules energy
transfer exciton interactions electronic and vibrational circular
dichroism coherence and dephasing ultrafast pump-probe and
photon-echo spectroscopy single-molecule and
fluorescence-correlation spectroscopy Raman scattering multiphoton
absorption quantum optics and non-linear optics entropy changes
during photoexcitation electronic and vibrational Stark
effects studies of fast processes in single molecules
two-dimensional electronic and vibrational spectroscopy This
revised and updated edition provides expanded discussions of laser
spectroscopy, crystal symmetry, birefringence, non-linear optics,
solar cells and light-emitting diodes. The explanations are
sufficiently thorough and detailed to be useful for researchers,
graduate students and advanced undergraduates in chemistry,
biochemistry and biophysics. They are based on time-dependent
quantum mechanics, but are developed from first principles so that
they can be understood by readers with little prior training in the
field. Additional topics and highlights are presented in special
boxes in the text. The book is richly illustrated with color
figures throughout. Each chapter ends with a section of questions
for self-examination.Â
Photocatalysis is considered by many as the most promising solution
for energy and environment problems. Among all the photocatalysts
available, titanium dioxide remains one of the most studied for
decades. Reducing its bandgap via doping is crucial to harvest
visible-light, which accounts for 48% of the total solar energy. In
addition, it is very important to keep the particle size small to
avoid recombination of the photo-generated electrons and holes. In
this book, nano-scaled metal and / or non-metal elements have been
used as dopants to modify the electronic structure of TiO2. X-ray
diffraction patterns (XRD), Raman spectroscopy, UV-Vis diffuse
reflectance spectroscopy (UV-DRS), Fourier transform infrared
spectroscopy (FTIR), scanning electron microscopy (SEM),
transmission electron microscopy (TEM) and X-ray photoelectron
spectroscopy (XPS) have been used to obtain detailed information of
the crystal structure, light-absorbing property, organic remains,
particle appearance, size distribution and elemental compositions,
respectively. Preliminary data indicates that the electronic
structure of TiO2 has been effectively reduced to render
visible-light reactivity.
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