18854-48-3Relevant articles and documents
Synthesis and properties of carbosilane dendrimers of the third and sixth generations with the ethylene oxide surface layer in bulk and in monolayers at the air-water interface
Novozhilova,Malakhova,Buzin,Buzin,Tatarinova,Vasilenko,Muzafarov
, p. 2514 - 2526 (2013)
A number of carbosilane dendrimers with the ethylene oxide surface layer was synthesized. The density of the surface layer determines their capability to form a physical network due to intermolecular entanglements. The specific interactions of the ethylene oxide fragments exert a minor effect on the thermal behavior of dendritic macromolecules. The compression-expansion isotherms of Langmuir films together with Brewster angle microscopy data show that an increase in the core rigidity with increasing the generation number favors the formation of ordered molecular multilayers. The appearance of a pronounced hysteresis in the compression-expansion cycles is a common phenomenon for amphiphilic dendrimers of high generations.
SYMMETRICAL AND UNSYMMETRICAL ORGANOSILICON MOLECULES AND ELECTROLYTE COMPOSITIONS
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Page/Page column 40, (2014/03/26)
Described are organosilicon electrolyte compositions having improved thermostability and electrochemical properties and electrochemical devices that contain the organosilicon electrolyte compositions.
Thermochromism and solvatochromism of non-ionic polar polysilanes
Oka, Kunio,Fujiue, Naofumi,Nakanishi, Saburo,Takata, Toshikazu,West, Robert,Dohmaru, Takaaki
, p. 45 - 51 (2007/10/03)
Polar polysilanes bearing ethereal side groups [{CH3-Si-(CH2)m-O-(CH2CH 2O)n-CH3}x, m = 3-5 and n = 0-3}] were prepared and were found to be soluble in a wide range of polar solvents. UV spectroscopic behavior is highly dependent on the nature of the solvents used but no simple relationship between λmax and specific solvent parameter is found. Small molar absorbance (ε 3)2CHOH (HFIP) in non-polar solvent (benzene, CH2Cl2) or even in (CH3)2CHOH solution, where higher HFIP concentration brings about longer wavelength absorption. This type of solvatochromism is originated by strong hydrogen bond formation between the ethereal side groups and HFIP. Because non-dissociative nature of HFIP-concerned hydrogen bonding, increased bulkiness of the side moieties brings about disentanglement. Polysilanes 1-5, though having long side chains, show thermochromism of continuous spectral shift on cooling. The same λmax value in thermochromism and solvatochromism indicates that nearly the same degree of disentanglement is caused by HFIP and thermally.