6 research outputs found
1,6- and 2,7-<i>trans</i>-β-Styryl Substituted Pyrenes Exhibiting Both Emissive and Semiconducting Properties in the Solid State
Molecular materials
that are both emissive and semiconducting are
highly demanding for organic optoelectronics. In this article, we
report the synthesis, emissive, and semiconducting properties of 1,6
and 2,7-<i>trans</i>-β-styryl substituted pyrenes
(<b>16PyE</b> and <b>27PyE</b>). The results reveal that
both <b>16PyE</b> and <b>27PyE</b> are emissive and semiconducting
in the solid state. The fluorescence quantum yields of crystalline
solids of <b>16PyE</b> and <b>27PyE</b> were determined
to be 28.8% and 27.4%, respectively. Microrods of <b>16PyE</b> and microplates of <b>27PyE</b> were found to exhibit promising
optical waveguilding behavior. Furthermore, on the basis of the transfer
and output curves of the respective organic field effect transistors
(OFETs), thin films of <b>16PyE</b> and <b>27PyE</b> were
found to show <i>p</i>-type semiconducting properties with
hole mobility up to 1.66 cm<sup>2</sup>V<sup>–1</sup>s<sup>–1</sup>. Such dual functions (emissive and semiconducting)
of <b>16PyE</b> and <b>27PyE</b> can be ascribed to the
unique intermolecular interactions and packing within crystals of <b>16PyE</b> and <b>27PyE</b>. Both 1,6 and 2,7-<i>trans</i>-β-styryl substituted pyrenes show relatively strong emissions
in the solid state, and their microcrystalline samples exhibit promising
optical waveguilding behavior. Moreover, their thin films exhibit <i>p</i>-type semiconducting property with hole mobilities up to
1.66 cm<sup>2</sup>V<sup>–1</sup>s<sup>–1</sup>
Spiro-Fused Perylene Diimide Arrays
The
straightforward palladium-catalyzed synthesis protocol toward
spiro-fused perylene diimides is developed. The reaction involves
two palladium-catalyzed C–H activations and 4-fold C–C
bond formation sequence from readily available precursors. This facile
and step-economic approach also provides another convenient access
to ethylene-bridged dimer (<b>NDP</b>) and further π-extended
spiro system (<b>SNTP</b>). In addition, the molecular structure
of spirodiperylenetetraimide (<b>SDP</b>) is illustrated to
show a three-dimensional (3D) cruciform configuration, and its absorbance
is distinctly red-shifted due to the significant spiroconjugation
effect. With combined properties of broadened and intensive absorption,
aligned LUMO levels, and unique molecular geometry, the spiro-fused
PDI system represents a new kind of high-performance semiconducting
framework as the electron acceptor in high-efficiency organic solar
cells
Spiro-Fused Perylene Diimide Arrays
The
straightforward palladium-catalyzed synthesis protocol toward
spiro-fused perylene diimides is developed. The reaction involves
two palladium-catalyzed C–H activations and 4-fold C–C
bond formation sequence from readily available precursors. This facile
and step-economic approach also provides another convenient access
to ethylene-bridged dimer (<b>NDP</b>) and further π-extended
spiro system (<b>SNTP</b>). In addition, the molecular structure
of spirodiperylenetetraimide (<b>SDP</b>) is illustrated to
show a three-dimensional (3D) cruciform configuration, and its absorbance
is distinctly red-shifted due to the significant spiroconjugation
effect. With combined properties of broadened and intensive absorption,
aligned LUMO levels, and unique molecular geometry, the spiro-fused
PDI system represents a new kind of high-performance semiconducting
framework as the electron acceptor in high-efficiency organic solar
cells
Additional file 1 of A pretreatment prediction model of grade 3 tumors classed by the IASLC grading system in lung adenocarcinoma
Additional file 1: Supplementary Table 1. Baseline characteristics of training and validation set
Fullerene/Sulfur-Bridged Annulene Cocrystals: Two-Dimensional Segregated Heterojunctions with Ambipolar Transport Properties and Photoresponsivity
Fullerene/sulfur-bridged annulene cocrystals with a two-dimensional
segregated alternating layer structure were prepared by a simple solution
process. Single-crystal analysis revealed the existence of continuing
π–π interactions in both the donor and acceptor
layers, which serve as transport paths for holes and electrons separately.
The ambipolar transport behaviors were demonstrated with single-crystal
field-effect transistors and rationalized by quantum calculations.
Meanwhile, preliminary photoresponsivity was observed with the transistor
configuration
Fullerene/Sulfur-Bridged Annulene Cocrystals: Two-Dimensional Segregated Heterojunctions with Ambipolar Transport Properties and Photoresponsivity
Fullerene/sulfur-bridged annulene cocrystals with a two-dimensional
segregated alternating layer structure were prepared by a simple solution
process. Single-crystal analysis revealed the existence of continuing
π–π interactions in both the donor and acceptor
layers, which serve as transport paths for holes and electrons separately.
The ambipolar transport behaviors were demonstrated with single-crystal
field-effect transistors and rationalized by quantum calculations.
Meanwhile, preliminary photoresponsivity was observed with the transistor
configuration