@phdthesis{Hippius2007,
  author    = {Hippius, Catharina},
  title     = {Multichromophoric Arrays of Perylene Bisimide Dyes - Synthesis and Optical Properties},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-24767},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2007},
  abstract  = {The present work deals with the synthesis and the investigation of the photophysical properties of covalently constructed calix[4]arene-perylene bisimide dye arrays containing various PBI units. The obtained conjugates are characterized with respect towards their application in a new, zigzag-type architecture of artificial light-harvesting systems. For this purpose, orange (core-unsubstituted), red (6,7,11,12-tert-butylphenoxy-functionalized) and green (1,7-pyrrolidino-substituted) perylene bisimide building blocks have been attached to the calix[4]arene scaffold. First, the monochromophoric reference systems have been studied, and second, the photophysical properties of a comprehensive series of newly synthesized, multichromophoric calix[4]arene-perylene bisimide conjugates showing efficient energy transfer processes between the individual dye subunits have been investigated. Furthermore, a series of bichromophoric compounds containing identical chromophoric units has been obtained. Towards this goal, a variety of spectroscopic techniques such as UV/vis absorption, steady state and time-resolved fluorescence emission, and femtosecond transient absorption spectroscopy as well as a spectrotemporal analysis of the obtained data has been applied. This work presents a new concept for an artificial light-harvesting system positioning the dye units by means of calix[4]arene spacers along a zigzag chain. The investigations start with the syntheses and optical properties of the monochromophoric building blocks and result in an elaborate study on the energy and electron transfer processes occurring after photoexcitation in a comprehensive series of multichromophoric calix[4]arene-perylene bisimide conjugates. Finally, the photophysical properties of a series of compounds containing each two identical PBI units are discussed.},
  subject      = {Fluoreszenz-Resonanz-Energie-Transfer},
  language  = {en}
}
@phdthesis{Roeger2007,
  author    = {R{\"o}ger, Cornelia},
  title     = {Bioinspired Light-Harvesting Zinc Chlorin Rod Aggregates Powered by Peripheral Chromophores},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-26760},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2007},
  abstract  = {Artificial light-harvesting (LH) systems have been obtained by self-assembly of naphthalene diimide-functionalized zinc chlorin dyads and triad in nonpolar, aprotic solvents. UV-vis, CD, and steady-state emission spectroscopy as well as atomic force microscopy showed that rod-like structures are formed by excitonic interactions of zinc chlorin units, while the appended naphthalene diimide dyes do not aggregate at the periphery of the cylinders. In all cases, photoexcitation of the enveloping naphthalene diimides at 540 and 620 nm, respectively, was followed by highly efficient energy-transfer processes to the inner zinc chlorin backbone, as revealed by time-resolved fluorescence spectroscopy on the picosecond time-scale. As a consequence, the LH efficiencies of zinc chlorin rod aggregates were increased by up to 63\%. The effective utilization of solar energy recommends these biomimetic systems for an application in electronic materials on the nanoscale.},
  subject      = {Farbstoff},
  language  = {en}
}