Quadrupolar Cyclopenta[
<i>hi</i>
]aceanthrylene‐Based Electron Donor‐Acceptor‐Donor Conjugates: Charge Transfer versus Charge Separation
作者:Christoph Schierl、Wiebke Alex、Luis M. Mateo、Beatriz Ballesteros、Daiki Shimizu、Atsuhiro Osuka、Tomas Torres、Dirk M. Guldi、Giovanni Bottari
DOI:10.1002/anie.201906206
日期:2019.10.7
Cyclopenta[hi]aceanthrylenes (CPAs) have been functionalized at two of the peripheral positions with electronically inert trimethylsilylethynyl (1), as well as with electron-donating 4-ethynyl-N,N-dimethylaniline (2), ethynyl ZnII phthalocyanine (3), and ethynyl ZnII porphyrin (4) units. Consistent with X-ray crystal structures of 2 and 4, analyses of absorption and fluorescence of 2-4 point to strong
porphyrins with a carboxyl group have been designed and synthesized for use as sensitizers in dye‐sensitizedsolarcells (DSSCs). The position and nature of a bridge connecting the porphyrin ring and carboxylic acid group show significant influences on the spectral, electrochemical, and photovoltaic properties of these sensitizers. Absorption spectra of porphyrins with a phenylethynyl bridge show that both