151237-08-0Relevant articles and documents
Palladium(ii) N-heterocyclic allenylidene complexes with extended intercationic Pd?Pd interactions and MMLCT phosphorescence
Zou, Chao,Lin, Jinqiang,Suo, Sa,Xie, Mo,Chang, Xiaoyong,Lu, Wei
, p. 5319 - 5322 (2018)
Extended intercationic Pd?Pd contacts of 3.30 ? in the crystal structure and distinct MMLCT transitions absorbing at 528 nm and emitting beyond 600 nm in solutions have been revealed with cyclometalated Pd(ii) N-heterocyclic allenylidene complexes. The Pd
Self-assembling of tapered benzenesulfonate-based dendrons with bulky aromatic focal groups
Shcherbina, Maxim A.,Bakirov, Artem V.,Yan, Linglong,Beginn, Uwe,Zhu, Xiaomin,M?ller, Martin,Chvalun, Sergey N.
, p. 142 - 144 (2015)
Comparative analysis of the structure and phase behavior of the synthesized compounds on the basis of symmetrically and asymmetrically substituted benzenesulfonic acids with bulky aromatic focal groups revealed that their phase behavior is determined equa
An electron-deficient tris(triazole)-based discotic liquid crystal that exhibits fast electron transport
Bala, Indu,De, Joydip,Dhingra, Shallu,Gupta, Santosh Prasad,Pal, Santanu Kumar,Pandey, Upendra Kumar
supporting information, p. 5628 - 5632 (2021/05/17)
In this study, a C3-symmetric star-shaped discotic mesogen has been reported based on an electron-deficient tris(triazole) central rigid core functionalized with three peripheral trialkoxyphenyl units. The mesogen exhibits an enantiotropic columnar hexagonal (Colh) phase that can sustain over a significant temperature range. When used in space-charge limited current (SCLC) devices, it showed ambipolar charge transport behavior with high electron mobility (μe) of 1.61 × 10-2 cm2 V-1 s-1 at ambient temperature. The finding is sufficiently significant to warrant their use in organic electronic devices.
High Hole Mobility and Efficient Ambipolar Charge Transport in Heterocoronene-Based Ordered Columnar Discotics
De, Joydip,Bala, Indu,Gupta, Santosh Prasad,Pandey, Upendra Kumar,Pal, Santanu Kumar
supporting information, p. 18799 - 18805 (2019/11/21)
Heterocoronene, a new redox-active core fragment, is utilized for the synthesis of room-temperature columnar discotic liquid crystals (DLCs). Three wedge-shaped side chains having different lengths of alkyl tails are introduced at the periphery of the het
Modular synthesis of polymers containing 2,5-di(thiophenyl)-N-arylpyrrole
Truong, Tran N. B.,Savagatrup, Suchol,Jeon, Intak,Swager, Timothy M.
, p. 1133 - 1139 (2018/03/27)
A modular and facile route has been developed to synthesize functionalized 2,5-di(thiophen-2-yl)-1-H-arylpyrroles from readily available starting materials. These units are compatible with various polymerization conditions and are versatile building blocks for conjugated polymers. The polymers show high thermal stability and solubility in a number of solvents. Characterization of the polymers reveals a correlation between molecular packing, controllable by polymer design, and charge carrier mobility.
Generation of liquid crystallinity from a Td-symmetry central unit
Sayed, Sayed Mir,Lin, Bao-Ping,Yang, Hong
, p. 6148 - 6156 (2016/07/26)
A series of new columnar liquid crystals containing an adamantane central unit with its four bridgehead positions partially or fully decorated with different numbers (1-4) of 3,4,5-tris(dodecyloxy)phenyl carbamoyl groups were designed and investigated carefully to explore the structure-property correlations. The molecular structures and mesomorphic properties of the DLCs were characterized by 1H-NMR, 13C-NMR, IR, UV-vis, POM, DSC and XRD. It was found that the mesophase symmetry and thermal stability were extremely dependent on the structures of the adamantane derivatives. No mesophase was observed for the 1-adamantanecarboxylic acid derivative ADLC1, while two different mesophases were observed for ADLC2, a 1,3-disubstituted derivative functionalized with two 3,4,5-tris(dodecyloxy)phenyl carbamoyl groups at two symmetric bridgehead positions. At lower temperature ADLC2 exhibited a rectangular columnar phase, which switched to a square columnar phase possessing a wide temperature range. Similarly, a hexagonal columnar mesophase was observed for the bridgehead trisubstituted adamantane molecule ADLC3. Interestingly, the fully bridgehead-functionalized 1,3,5,7-tetrasubstituted adamantane compound ADLC4 completely lost liquid crystallinity.
The effect of the shape of the mesogenic group on the structure and phase behavior of 2,3,4-tris(dodecyloxy)benzenesulfonates with alkaline cations
Shcherbina, Maxim A.,Bakirov, Artem V.,Yakunin, Andrei N.,Beginn, Uwe,Yan, Linglong,Moeller, Martin,Chvalun, Sergei N.
, p. 1746 - 1757 (2014/03/21)
Synthesis and mesophase structure characterisation are reported for a group of alkali salts of 2,3,4-tris(dodecyloxy)benzenesulfonic acid. As revealed by a combination of polarizing optical microscopy, differential scanning calorimetry and X-ray scattering, variation of the effective mesogen shape due to changes of the cation size leads to systematic transformation of the materials' phase behaviour. Thermotropic mesophases of different types and dimensionalities were observed: 1D (smectic bilayers), 2D (ordered and disordered columnar phases), and 3D (high-temperature micellar mesomorphic phase, low-temperature crystalline one). Cubic packing prevails when the cation size is small and, thus, the effective mesogen shape is close to the conic one. With increasing ion size, the mesogen shape becomes more tapered, and columnar mesophases appear to be more stable. The Royal Society of Chemistry.
An unusual stacking transformation in liquid-crystalline columnar assemblies of clicked molecular propellers with tunable light emissions
Kim, Jinhee,Cho, Sung,Cho, Byoung-Ki
supporting information, p. 12734 - 12739 (2015/03/30)
The columnar liquid-crystalline (LC) and fluorescence properties of three-dimensional molecular propellers based on tetraphenylethylene is reported. X-ray scattering studies reveal an unusual transition from a rectangular (Colrec) to a hexagona
Supramolecular functionalization of single-walled carbon nanotubes (SWNTs) with dithieno[3,2- b:2′,3′-d ]pyrrole (DTP) containing conjugated polymers
Imin, Patigul,Imit, Mokhtar,Adronov, Alex
scheme or table, p. 9138 - 9145 (2012/04/18)
Fluorene and dithieno[3,2-b:2′,3′-d]pyrrole (DTP) containing conjugated polymers, {2,7-[9,9-didodecylfluorene]-alt-2,6-[N-dodecyldithieno(3, 2-b:2′,3′-d)pyrrole]} (PF-DTP1) and {2,7-[9,9-didodecylfluorene]- alt-2,6-[N-3,4,5(n-dodecyloxy)phenyldithieno(3,2-b:2′,3′-d)pyrrole]} (PF-DTP2), have been successfully synthesized using Suzuki polycondensation. These polymers possess excellent thermal stability with decomposition temperatures over 365 °C under Ar. The introduction of soluble side chains on the DTP units and incorporation with soluble dialkyl-substituted fluorene resulted in highly soluble polymers with novel optoelectronic properties. The supramolecular complex formation of these DTP containing polymers with single-walled carbon nanotubes (SWNTs) has been studied, and it was found that these polymers can form strong supramolecular polymer-nanotube assemblies and produce stable complexes in solution. UV-vis-NIR absorption, photoluminescence excitation (PLE), and Raman spectroscopy were used for the characterization and identification of the nanotube species that are present in THF solution. The strong nanotube emission was observed from individual SWNTs even after removal of excess free polymer by filtration and washing. On the basis of these two polymers, it was found that the interactions with the SWNT surface are more strongly dictated by the polymer backbone than the side chain, though further studies may be warranted.
A new class of discotic mesogens derived from tris(N-salicylideneaniline)s existing in C3h and Cs keto-enamine forms
Yelamaggad, Channabasaveshwar V.,Achalkumar, Ammathnadu S.,Rao, D. S. Shankar,Prasad, S. Krishna
, p. 8308 - 8318 (2008/03/12)
(Chemical Equation Presented) Two series of a unique class of columnar liquid crystals derived from tris(N-salicylideneaniline)s [TSANs] in which the proton and the electron interact with each other through the H-bonding environment are reported. The synt
