891194-18-6Relevant articles and documents
Soluble Graphene Nanoribbons from Planarization of Oligophenylenes
Sen, Choong Ping,Valiyaveettil, Suresh
, p. 1686 - 1693 (2017)
A solution-based chemical synthesis of two graphene nanoribbons with armchair edges is reported. The precursor oligophenylene molecules are synthesized and subjected to oxidative cyclodehydrogenation to afford the target molecules, G-1 and G-2. These molecules have good solubility in organic solvents, and show a large redshift in their absorption edge (up to 185 nm) and emission maximum (up to 125 nm) after planarization. Fibrous structures are formed upon self-assembly of molecules through columnar π–π stacking. Such molecular assemblies may be useful for various applications.
Butterfly-like Shape Liquid Crystals Based Fused-Thiophene as Unidimensional Ambipolar Organic Semiconductors with High Mobility
Ma, Tao,Zhong, Yu-Jie,Wang, Hai-Feng,Zhao, Ke-Qing,Wang, Bi-Qin,Hu, Ping,Monobe, Hirosato,Donnio, Bertrand
supporting information, p. 1106 - 1117 (2021/03/26)
Mesomorphous butterfly-like shape molecules based on benzodithiophene, benzodithiophene-4,8-dione and cyclopentadithiophen-4-one core moieties were efficiently synthesized by the Suzuki-Miyaura coupling and Scholl oxidative cyclo-dehydrogenation reactions’ tandem. Most of the butterfly molecules spontaneously self-organize into columnar hexagonal mesophase. The electron-deficient systems possess strong solvent-gelling ability but are not luminescent, whereas the electron-rich terms do not form gels but strongly emit light between 400 and 600 nm. The charge carrier mobility was also measured by time-of-flight transient photocurrent technique in the mesophases for some of the compounds. They display hole-transport performances with positive charge mobility in the 10?3 cm?2 V?1 s?1 range, consistent with the high degree of ordering and stability of the columnar superstructures. In particular, the mesogen with a benzodithiophen-4,8-dione core shows ambipolar charge carrier transport with both high electron (μe=6.6×10?3 cm?2 V?1 s?1) and hole (μh=4.5×10?3 cm?2 V?1 s?1) mobility values.
Luminescent metallomesogens based on platinum complex containing triphenylene unit
Shi, Junwei,Wang, Yafei,Xiao, Manjun,Zhong, Ping,Liu, Yu,Tan, Hua,Zhu, Meixiang,Zhu, Weiguo
, p. 463 - 469 (2015/02/02)
To explore the influence of mesogenic unit on the liquid crystals and luminescence properties of metal complex, two novel triphenylene-based platinum complexes of TppyPtacac and TppyPtPhacac featuring donor-acceptor framework have been designed and synthesized, in which Tppy is triphenylene-phenylpyridine skeleton and acac/Phacac is pentane-2,4-dione derivative. Differential scanning calorimetry (DSC), polarized optical microscopy (POM) and X-ray diffraction (XRD) techniques demonstrate the complex TppyPtPhacac shows a column mesophase in the region of 55-110 °C. Both platinum complexes exhibit intense emission at about 550 nm in CH2Cl2 solution. Compared to the analogous platinum complexes without triphenylene unit, TppyPtacac and TppyPtPhacac display a remarkable red-shifted emission profiles (ca. 50 nm) due to strong intramolecular charge transfer. Furthermore, the hole mobilities up to 2.5×10-4 cm2 V-1 s-1 and 2.99×10-5 cm2 V-1 s-1 are achieved for the annealed film of TppyPtacac and TppyPtPhacac, respectively, which is one of the highest hole mobility with respect to cyclometalated platinum complexes.
Synthesis and properties of poly(10-octylphenothiazine-CO-2′, 3′,6′,7′-tertrakis-octyloxy-9-spirobifluorene) for OLEDs
Kang, Ji-Soung,Park, Jong-Wook,Lee, Ji-Hoon,Oh, Se-Young
, p. 267 - 276 (2007/10/03)
Many attempts have been focused on polymer light-emitting diodes (PLEDs) for large area display application. We report synthesis and properties of new phenothiazyl polymer derivatives, Poly(10-octyl-10H-phenothiazine-3,7-diyl) (POP), Poly(2',3',6',7'-tert
