Synthesis and Characterization of Electron-Deficient Pentacenes
摘要:
Halogen functional groups on pentacene can be used both as synthetic handles for further functionalization as well as to tune the pi-stacking in these systems. The halogenated pentacene derivatives described here (X = Br, X' = H, and X = X' = F) are all stable and soluble, with reduction potentials significantly lower than that of the parent functionalized pentacene (X = X' = H). The bromopentacenes could be further elucidated to pentacene nitriles, further decreasing the acene's reduction potential, while the charge-carrier mobility in the fluorinated systems was shown to scale with the degree of fluorine substitution.
Unusual Molecular Conformations in Fluorinated, Contorted Hexabenzocoronenes
作者:Yueh-Lin Loo、Anna M. Hiszpanski、Bumjung Kim、Sujun Wei、Chien-Yang Chiu、Michael L. Steigerwald、Colin Nuckolls
DOI:10.1021/ol102016m
日期:2010.11.5
contorted hexabenzocoronenes (HBCs) have been synthesized in a facile manner via Suzuki−Miyaura coupling of fluorinated phenyl boronic acids followed by photocyclization and Scholl cyclization. In addition to the molecular conformation observed in previous HBC derivatives, close-contact fluorine−fluorine intramolecular interactions result in a metastable conformation not previously observed. Heating the
Synthesis and Characterization of Electron-Deficient Pentacenes
作者:Christopher R. Swartz、Sean R. Parkin、Joseph E. Bullock、John E. Anthony、Alex C. Mayer、George G. Malliaras
DOI:10.1021/ol050872b
日期:2005.7.1
Halogen functional groups on pentacene can be used both as synthetic handles for further functionalization as well as to tune the pi-stacking in these systems. The halogenated pentacene derivatives described here (X = Br, X' = H, and X = X' = F) are all stable and soluble, with reduction potentials significantly lower than that of the parent functionalized pentacene (X = X' = H). The bromopentacenes could be further elucidated to pentacene nitriles, further decreasing the acene's reduction potential, while the charge-carrier mobility in the fluorinated systems was shown to scale with the degree of fluorine substitution.
Role of crystallinity of non-fullerene acceptors in bulk heterojunctions
作者:Jes B. Sherman、Balaji Purushothaman、Sean R. Parkin、Chunki Kim、Sam Collins、John Anthony、Thuc-Quyen Nguyen、Michael L. Chabinyc
DOI:10.1039/c5ta01206f
日期:——
The role of crystallinity of pentancene-based acceptors in BHJ solar cells is elucidated. The sandwich herringbone packing motif leads to higher performance than cofacial packing.