608-80-0Relevant articles and documents
Synthesis and self-assembly of a heteroarm star amphiphile with 12 alternating arms and a well-defined core
Teng, Jing,Zubarev, Eugene R.
, p. 11840 - 11841 (2003)
We report on a stepwise synthesis of a heteroarm starlike amphiphile containing 12 alternating arms (six polystyrene and six poly(acrylic acid)) connected to a hexabiphenyl aromatic core. The synthesis does not involve polymerization, and only commercially available precursors are used. Most importantly, this amphiphile undergoes self-assembly into spherical and wormlike cylindrical micelles in aqueous and methanol solutions, and forms reverse 1D micellar structures in chloroform. This remarkable morphological diversity of the reported amphiphile 1 is believed to be a direct consequence of its well-defined molecular architecture. Copyright
Hypovalent titanium and Ti(II)-Ti(III) interconversions
Dhar, Basab Bijayi,Gould, Edwin S.
experimental part, p. 1616 - 1619 (2010/06/20)
Treatment of pink titanium(iii) triflate (0.045 M) with HF in triflic acid (CH3SO3H) converts Ti(iii) rapidly to a 1:1 mixture of TiIV and green TiII: (2 TiIII + 4 HF → TiF4 + TiII + 4 H+). This disproportionation is half complete when [HF] added is 0.027 M. Substituted 1,4-benzoquinones are reduced rapidly by Ti(iii) in the absence of fluoride, yielding straightforward logarithmic curves, but reactions of the same quinones with Ti(ii) in fluoride media exhibit more complex profiles, the major portions of which are zero order in oxidant. These reactions are strongly catalyzed by added Ti(iv). Analyses of complex curves are consistent with a reaction sequence initiated by Ti(ii)-Ti(iv) disproportionation, forming Ti(iii), which reacts with the quinone, yielding the quinhydrone, QH. The latter is rapidly reduced by Ti(ii). Values of rate constants obtained from these analyses are in agreement with those for reductions of quinones by Ti(iii), in the absence of fluoride. The Royal Society of Chemistry 2010.
REDUCTION OF METHYL BENZOYLFORMATE BY REDUCED NICOTINAMIDE ADENINE DINUCLEOTIDE MODEL IN THE PRESENCE OF RHODIZONIC ACID
Endo, Takeshi,Takada, Tadayoshi,Okawara, Makoto
, p. 615 - 618 (2007/10/02)
The reduction of rhodizonic acid (RA) with 1-benzyl-1,4-dihydronicotinamide (BNAH; NADH model) was carried out at room temperature to obtain tetrahydroxy-p-quinone (THQ) and hexahydroxybenzene (HHB) by two-electron and four-electron reductions, respectively.The reduction of methyl benzoylformate with BNAH proceded smoothly in the presence of RA, although it could not be reduced at all without RA.