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Dimers hydrocarbon cores

The reader may notice that only saturated hydrocarbons (with a possible exception of CCI4) have been observed to yield rapidly migrating solvent holes. As mentioned above, part of this bias is explained by the fact that the holes are usually short-lived, so their dynamic properties are difficult to study. However, in many liquids (such as aromatic hydrocarbons and sc CO2), the solvent holes are relatively stable, yet no rapid hole hopping is observed. In such liquids, the solvent hole has a well-defined dimer cation core with strong binding between the two halves (in the first place, it is this dimerization that... [Pg.321]

Oligomers of perfluorohexyl-ethene fulfilled these expectations in all preclinical studies, in vitro tests as well in animal tests. A radical polymerisation, followed by ultra-purification steps, created a crystal clear gel-like substance. The behaviours of the mixture of dimeric, trimeric and tetrameric star-shaped species with an inner core of hydrocarbon bonds and an outer layer of perfluoro-alkyl chains could be adjusted by the ratio of the dimeric, trimeric and tetrameric species, using a thin layer distillation. In dependence on this ratio, the viscosity could be adjusted in the range between 90 mPas and 1700 mPas, the specific density between 1.60 g/ml and 1.66 g/ml and the interfacial tension against water between... [Pg.441]

Electron photodetachment upon laser excitation of the solvent anion above 1.76 eV was observed (Fig. 2a,c) [18]. The cross section of photodetachment linearly increases between 1.76 and 3 eV (Fig. 2b). Under the same physical conditions, the photodetachment and absorption spectra of the solvent anion are identical (Fig. 2b) [20], suggesting a bound-to-CB transition the quantum yield of the photodetachment is close to unity. The photodetachment spectrum is similar to the photoelectron spectra of (C02) 9 clusters observed by Tsukuda et al. [24] in the gas phase it is distinctly different from the electron photodetachment spectra of CO2 in hydrocarbon liquids [27]. This suggests that a C-C bound, 7)2, symmetric dimer anion constitutes the core of the solvent radical anion [18,19]. [Pg.306]


See other pages where Dimers hydrocarbon cores is mentioned: [Pg.326]    [Pg.177]    [Pg.331]    [Pg.93]    [Pg.599]    [Pg.220]    [Pg.221]    [Pg.230]    [Pg.4216]    [Pg.111]    [Pg.162]    [Pg.430]    [Pg.431]    [Pg.37]    [Pg.93]    [Pg.4215]    [Pg.5218]    [Pg.622]    [Pg.3468]    [Pg.3468]    [Pg.5]    [Pg.925]   
See also in sourсe #XX -- [ Pg.2 ]

See also in sourсe #XX -- [ Pg.2 , Pg.716 ]




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Hydrocarbon core

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