116223-59-7Relevant academic research and scientific papers
Template-mediated synthesis of polycyclic aromatic hydrocarbons: Cyclodehydrogenation and planarization of a hexaphenylbenzene derivative at a copper surface
Weiss, Klaus,Beernink, Gunda,Doetz, Florian,Birkner, Alexander,Muellen, Klaus,Woell, Christof H.
, p. 3748 - 3752 (1999)
The deposition of polycyclic aromatic hydrocarbons on substrate surfaces is a key step for using such disklike molecules in nanoelectronic devices. An alternative to the (frequently problematic) preparation by evaporation or deposition from solution is to
Triphenylamine- And triazine-containing hydrogen bonded complexes: liquid crystalline supramolecular semiconductors
Feringán, Beatriz,Termine, Roberto,Golemme, Attilio,Granadino-Roldán, José M.,Navarro, Amparo,Giménez, Raquel,Sierra, Teresa
, p. 1972 - 1982 (2021)
Despite the fact that triphenylamine derivatives have been widely explored as hole-transporting materials, studies on charge transport properties in the liquid crystal phase have been overlooked. Here, it is reported that triphenylamine liquid crystals can attain very high hole mobility values in a hexagonal columnar mesophase, up toμ≈ 5 cm2V?1s?1. The columnar liquid crystalline phase was obtained by a proper design of a supramolecular mesogen, and this is unprecedented for triphenylamine liquid crystals. In fact, the supramolecules were formed by hydrogen-bonded 1?:?3 complexes of a star-shaped triazine core and three triphenylamine peripheral units. The resulting hexagonal columnar mesophase acts as a successful scaffold that confines TPA units at the periphery of columns. Challenging DFT theoretical investigations into a model based on such supramolecular systems involving a large number of atoms were undertaken to explore the stability and geometry of the complexes and their electronic properties.
Solid-Solid Phase Transitions in [ trans-Pt(PMe3)2(C=CC6H4R)2]-Containing Materials (R = O(CH2)nH; N = 6, 9, 12, and 15)
Marineau Plante, Gabriel,Fortin, Daniel,Soldera, Armand,Harvey, Pierre D.
, p. 2544 - 2552 (2018)
The title complexes were prepared in Hagihara conditions and were investigated by single crystal X-ray crystallography (n = 6, [Pt]C6; n = 12, [Pt]C12), X-ray powder diffraction (powder XRD), differential scanning calorimetry (DSC),
Synthesis of Fluoroalkyl Sulfides via Additive-Free Hydrothiolation and Sequential Functionalization Reactions
Sunagawa, Denise E.,Ishida, Naoyoshi,Iwamoto, Hiroaki,Ohashi, Masato,Fruit, Corinne,Ogoshi, Sensuke
, p. 6015 - 6024 (2021/05/04)
A modular synthetic method, involving a hydrothiolation, silylation, and fluoroalkylation, for the construction of highly functionalized fluoroalkyl sulfides has been developed. The use of aprotic polar solvents enables the additive-free chemoselective hydrothiolation of tetrafluoroethylene, trifluorochloroethylene, and hexafluoropropene with various thiols. The stepwise functionalization reactions convert the hydrothiolated intermediates into the tetrafluoroethyl sulfides in high efficiency. The method avoids the use of the environmental pollutant Halon-2402, which was employed as a building block in a reported synthetic route.
Reversible sol-to-gel transformation of uracil gelators: Specific colorimetric and fluorimetric sensor for fluoride ions
Xing, Ling-Bao,Yang, Bing,Wang, Xiao-Jun,Wang, Jiu-Ju,Chen, Bin,Wu, Qianhong,Peng, Hui-Xing,Zhang, Li-Ping,Tung, Chen-Ho,Wu, Li-Zhu
, p. 2843 - 2848 (2013/08/25)
A new type of anthracene organogelator based on uracil was obtained using organic aromatic solvents, cyclohexane, DMSO, ethanol, and ethyl acetate. It was further characterized by field-emission scanning electron microscopy and transmission electron micro
Enhanced anhydrous proton conduction in binary mixtures of 1H-imidazole-1H-1,2,3-triazole based compounds
Basak, Dipankar,Versek, Craig,Harvey, Jacob A.,Christensen, Scott,Hillen, Jibben,Auerbach, Scott M.,Tuominen, Mark T.,Venkataraman
, p. 20410 - 20417 (2013/02/23)
What is the impact of mixing two proton-conducting heterocycles on proton conductivity? Herein we answer this question through our investigations on two linear rod-like compounds 2-(4-(dodecyloxy)phenyl)-1H-imidazole (4) and 5-(4-(dodecyloxy)phenyl)-1H-1,
Chemical synthesis, biological evaluation and structure-activity relationship analysis of azaisoindolinones, a novel class of direct enoyl-ACP reductase inhibitors as potential antimycobacterial agents
Deraeve, Céline,Dorobantu, Ioana Miruna,Rebbah, Farah,Le Quéméner, Frédéric,Constant, Patricia,Quémard, Anna?k,Bernardes-Génisson, Vania,Bernadou, Jean,Pratviel, Geneviève
supporting information; experimental part, p. 6225 - 6232 (2011/12/14)
The synthesis and biological evaluation of azaisoindolinone compounds embedding a lipophilic chain on the framework were performed. These compounds were designed as InhA inhibitors and as anti-Mycobacterium tuberculosis agents. Structure-activity relation
Two-photon absorption properties of proquinoidal D-A-D and A-D-A quadrupolar chromophores
Susumu, Kimihiro,Fisher, Jonathan A.N.,Zheng, Jieru,Beratan, David N.,Yodh, Arjun G.,Therien, Michael J.
scheme or table, p. 5525 - 5539 (2011/08/06)
We report the synthesis, one- and two-photon absorption spectroscopy, fluorescence, and electrochemical properties of a series of quadrupolar molecules that feature proquinoidal p-aromatic acceptors. These quadrupolar molecules possess either donoracceptor donor (D-A-D) or acceptordonoracceptor (A-D-A) electronic motifs, and feature 4-N,N-dihexylaminophenyl, 4-dodecyloxyphenyl, 4-(N,N-dihexylamino)benzo[c][1,2,5]thiadiazolyl or 2,5-dioctyloxyphenyl electron donor moieties and benzo[c][1,2,5]thiadiazole (BTD) or 6,7-bis(30,70-dimethyloctyl)[1,2,5]thiadiazolo[3,4-g]quinoxaline (TDQ) electron acceptor units. These conjugated structures are highly emissive in nonpolar solvents and exhibit large spectral red-shifts of their respective lowest energy absorption bands relative to analogous reference compounds that incorporate phenylene components in place of BTD and TDQ moieties. BTD-based D-A-D and A-D-A chromophores exhibit increasing fluorescence emission redshifts, and a concomitant decrease of the fluorescence quantum yield (Ff) with increasing solvent polarity; these data indicate that electronic excitation augments benzothiadiazole electron density via an internal charge transfer mechanism. The BTD- and TDQcontaining structures exhibit blue-shifted two-photon absorption (TPA) spectra relative to their corresponding one-photon absorption (OPA) spectra, and display high TPA cross sections (>100 GM) within these spectral windows. D-A-D and A-D-A structures that feature more extensive conjugation within this series of compounds exhibit larger TPA cross sections consistent with computational simulation. Factors governing TPA properties of these quadrupolar chromophores are discussed within the context of a three-state model.
Dicationic imidazolium-based ionic liquids and ionic liquid crystals with variously positioned fluoro substituents
Li, Xiaoju,Bruce, Duncan W.,Shreeve, Jean'Ne M.
experimental part, p. 8232 - 8238 (2010/06/16)
A series of new dicationic imidazolium-based organic salts bearing fluoro substituents on the bent-core unit and/or linker benzene-ring positions has been synthesized and characterized. The properties of these salts, including transition and decomposition temperatures, and density were determined, indicating that their performance is strongly dependent on the positions of the fluoro substituents, the number of carbon atoms in the alkyl group, and the anion present. Examination by polarized optical microscopy showed that the four salts (compounds 4c, 7a, 7b and 8b, where the alkyl group was C 12H25-) were mesomorphic and these data were supported by DSC measurements.
Synthesis and mesomorphic properties of rigid-core ionic liquid crystals
Kouwer, Paul H. J.,Swager, Timothy M.
, p. 14042 - 14052 (2008/09/17)
Ionic liquid crystals combine the unique solvent properties of ionic liquids with self-organization found for liquid crystals. We report a detailed analysis of the structure-property relationship of a series of new imidazolium-based liquid crystals with an extended aromatic core. Investigated parameters include length and nature of the tails, the length of the rigid core, the lateral substitution pattern, and the nature of the counterion. Depending on the molecular structure, two mesophases were observed: a bilayered SmA 2 phase and the more common monolayered SmA phase, both strongly interdigitated. Most materials show mesophases stable to high temperatures. For some cases, crystallization could be suppressed, and room-temperature liquid crystalline phases were obtained. The mesomorphic properties of several mixtures of ionic liquid crystals were investigated. Many mixtures showed full miscibility and ideal mixing behavior; however, in some instances we observed, surprisingly, complete demixing of the component SmA phases. The ionic liquid crystals and mixtures presented have potential applications, due to their low melting temperatures, wide temperature ranges, and stability with extra ion-doping.
