122447-72-7Relevant articles and documents
On-Surface Synthesis and Characterization of Triply Fused Porphyrin–Graphene Nanoribbon Hybrids
Mateo, Luis M.,Sun, Qiang,Liu, Shi-Xia,Bergkamp, Jesse J.,Eimre, Kristjan,Pignedoli, Carlo A.,Ruffieux, Pascal,Decurtins, Silvio,Bottari, Giovanni,Fasel, Roman,Torres, Tomas
, p. 1334 - 1339 (2019/12/12)
On-surface synthesis offers a versatile approach to prepare novel carbon-based nanostructures that cannot be obtained by conventional solution chemistry. Graphene nanoribbons (GNRs) have potential for a variety of applications. A key issue for their appli
Highly efficient dual anthracene core derivatives through optimizing side groups for blue emission
Lee, Hayoon,Jo, Minjin,Yang, Garam,Jung, Hyocheol,Kang, Seokwoo,Park, Jongwook
, p. 27 - 36 (2017/07/03)
TP-AA-TPB, TP-AA-TPB, TPB-AA-TPB, TP-AA-DPA, TP-AA-TPA, and TPB-AA-TPA were synthesized using a 9,9'-bianthracene (AA core). Through a systematic side group change, we optimized the dual-core chromophore system and investigated the relationship between the core and the side groups. The ultraviolet-visible (UV-Vis) absorption of the six materials showed an intrinsic absorption peaks of anthracene in the range of 360 nm–410 nm and photoluminescence (PL) emission in the blue region. The minimum decomposition temperatures (Td) was 425 °C, the minimum melting temperatures (Tm) was 335 °C, and the minimum glass transition temperatures (Tg) was 176 °C. We achieved excellent overall electroluminescence (EL) efficiency in non-doped OLED devices using the six synthesized materials as emitting layer (EML). TPB-AA-TPA synthesized through size and polarity optimization of the side groups on the AA core had a current efficiency of 8.97 cd/A, power efficiency of 4.43 lm/W, external quantum efficiency (EQE) of 6.37%, and Commission Internationale de L'Eclairage coordinates (CIE) of (0.14, 0.19). TPB-AA-TPA also maintained blue emission and realized the highest EL efficiency among the six synthesized materials.
Photoinduced C-C reactions on insulators toward photolithography of graphene nanoarchitectures
Palma, Carlos-Andres,Diller, Katharina,Berger, Reinhard,Welle, Alexander,Bj?rk, Jonas,Cabellos, Jose Luis,Mowbray, Duncan J.,Papageorgiou, Anthoula C.,Ivleva, Natalia P.,Matich, Sonja,Margapoti, Emanuela,Niessner, Reinhard,Menges, Bernhard,Reichert, Joachim,Feng, Xinliang,R?der, Hans Joachim,Klappenberger, Florian,Rubio, Angel,Müllen, Klaus,Barth, Johannes V.
supporting information, p. 4651 - 4658 (2014/04/17)
On-surface chemistry for atomically precise sp2 macromolecules requires top-down lithographic methods on insulating surfaces in order to pattern the long-range complex architectures needed by the semiconductor industry. Here, we fabricate sp2-carbon nanometer-thin films on insulators and under ultrahigh vacuum (UHV) conditions from photocoupled brominated precursors. We reveal that covalent coupling is initiated by C-Br bond cleavage through photon energies exceeding 4.4 eV, as monitored by laser desorption ionization (LDI) mass spectrometry (MS) and X-ray photoelectron spectroscopy (XPS). Density functional theory (DFT) gives insight into the mechanisms of C-Br scission and C-C coupling processes. Further, unreacted material can be sublimed and the coupled sp2-carbon precursors can be graphitized by e-beam treatment at 500 °C, demonstrating promising applications in photolithography of graphene nanoarchitectures. Our results present UV-induced reactions on insulators for the formation of all sp 2-carbon architectures, thereby converging top-down lithography and bottom-up on-surface chemistry into technology.
