- Preparation, structures, and physical properties of tetrakis(alkylthio) tetraselenafulvalene (TTCn-TSeF, n = 1-15)
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A series of tetrakis(alkylthio)tetraselenafulvalene compounds (TTC n-TSeF, n = 1-15) were prepared by a one-step reaction between dialkyl disulfide and tetralithiated TSeF. Molecular properties (redox potentials and optical absorptions in solution) and solid-state properties (thermal behaviors, electric conductivities, and molecular and crystal structures for n = 1 and 10) were studied. TTCn-TSeF compounds are weak electron donor molecules and characterized by small on-site Coulomb repulsion. TTC1-TSeF has a high-dimensional conduction network owing to the presence of highdimensional heteroatomic contacts, "Atomic-Wire Effect." The π-moieties of TTC10-TSeF were fastened by the alkyl chains ("Fastener Effect") to form π-columns and there are a variety of short heteroatomic contacts resulting in two dimensional electronic structure. Electrical conductivity exhibited peculiar enhancement for n = 1 and 7 ≤ n ≤ 14 owing to the presence of high-dimensional conduction paths. These compounds may manifest high carrier mobility, and are good candidates for the field-effect transistor channel based on the advantageous features: low dark conductivity, low donor ability, on-site Coulomb repulsion energy, high-dimensional π-electron structure, and high solubility in organic solvents.
- Saito, Gunzi,Yoshida, Yukihiro,Murofushi, Hidenobu,Iwasawa, Naoko,Hiramatsu, Takaaki,Otsuka, Akihiro,Yamochi, Hideki,Isa, Kimio,Mineo-Ota, Eriko,Konno, Michiko,Mori, Takehiko,Imaeda, Ken-Ichi,Inokuchi, Hiroo
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supporting information; experimental part
p. 335 - 344
(2010/07/09)
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- Cobalt phthalocyanine mediated aerobic oxidation of thiols: A simple and convenient preparation of disulphides
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Cobalt phthalocyaninetetrasulphonamide/tetrasodium salt of cobalt tetrasulphophthalocyanine catalyzed oxidation with molecular oxygen form a simple, efficient and environmentally acceptable synthetic tool for the oxidation of thiols to disulphides in excellent yields, under mild conditions and without any side reactions.
- Venkateshwar Rao,Narasimha Rao,Jain, Suman L.,Sain, Bir
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p. 1151 - 1157
(2007/10/03)
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- Hydrotalcite clay-catalysed air oxidation of thiols
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Hydrotalcite is an efficient catalyst for air oxidation of a variety of aromatic, aliphatic and alicyclic thiols in hexane, affording the corresponding disulfides in excellent to quantitative yields under mild and neutral conditions.
- Hirano, Masao,Monobe, Hiroyuki,Yakabe, Sigetaka,Morimoto, Takashi
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p. 374 - 375
(2007/10/03)
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- Simple Oxidation of Thiols with Sodium lodate under Solid-Solution Biphasic Conditions
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A variety of aromatic, aliphatic, and alicyclic thiols were readily oxidised with a combination of sodium iodate and Chromatographic neutral alumina in hexane to afford the corresponding disulfides in excellent yields under mild and neutral conditions.
- Hirano, Masao,Yakabe, Sigetaka,Ando, Ken-Ichiro,Morimoto, Takashi
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p. 816 - 817
(2007/10/03)
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- Alumina: An Efficient and Reusable Catalyst for the Oxidative Coupling of Thiols with DMSO
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An inexpensive combination of common laboratory reagents, dimethyl sulfoxide (DMSO) and Chromatographic neutral alumina, gives an efficient, selective, and high-yielding oxidation of aromatic, aliphatic and alicyclic thiols to the corresponding disulfides in excellent yields under relatively mild conditions.
- Hirano, Masao,Yakabe, Sigetaka,Monobe, Hiroyuki,Morimoto, Takashi
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p. 472 - 473
(2007/10/03)
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- Oxidation by Chemical Manganese Dioxide. Part 2.1 Simple and High-yielding Synthesis of Symmetrical Disulfides via the Oxidative Coupling of Thiols
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Aromatic, aliphatic, and alicyclic thiols readily underwent oxidative coupling with chemical manganese dioxide in hexane to afford the corresponding disulfides in essentially quantitative yields under relatively mild conditions.
- Hirano, Masao,Yakabe, Sigetaka,Chikamori, Hideki,Clark, James H.,Morimoto, Takashi
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p. 310 - 311
(2007/10/03)
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- An environmentally friendly oxidation of thiols to disulfides by calcium hypochlorite and montmorillonite K10 in hexane
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Aromatic, aliphatic, and alicyclic thiols can be readily oxidized to the disulfides quantitatively by calcium hypochlorite and moist Montmorillonite K10 under mild and neutral conditions.
- Hirano, Masao,Yakabe, Shigetaka,Fukami, Masataka,Morimoto, Takashi
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p. 2783 - 2788
(2007/10/03)
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