Synthesis and structural studies of polyphilic mesogens with central or terminal perfluoroalkyl chains
Article Abstract:
Experiments were performed to investigate the synthesis and chemical structure of the polyphilic mesogen benzyl 4-iodoperfluorobutanoate. The samples underwent partial pyrolysis using perfluoroglutaryl chloride with potassium iodide at temperatures of 200-2440 degrees Celsius. The findings confirmed the formation of smectic layers made of well-defined sublayers from polyphilic compounds. Moreover, the geometric positioning of the samples in the S (sub E) phase were attributed to the herringbone packing of biphenyl cores near the crystal structure of the unsubstituted biphenyl.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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Effect of metallic ions on silk formation in the mulberry silkworm, Bombyx mori
Article Abstract:
The concentrations of six metal elements (Na, K, Mg, Ca, Cu and Zn) at different stages in the silk secretory pathway in the Bombyx mori silkworm is investigated using proton induced X-ray emission (PIXE), inductively coupled plasma mass spectroscopy (ICP-MS) and atomic adsorpton spectroscopy (AAS). It is seen that the metal element contents increased from the posterior part to the anterior part of silk gland with the exception of Ca, which decreased significantly in the anterior part.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2005
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The electronic structures and formation mechanisms of the single-walled BN nanotube with small diameter
Article Abstract:
For the purpose of understanding the properties of electronic structures of armchair (3,3) boron nitride BN tube and its possible growth mechanisms starting from B12N12, a possible smallest single-walled BN nanotube with the diameter of 0.4nm is proposed. The calculations show that the armchair (3,3) BN tube has a very close thermodynamic stability to and greater kinetic stability than the known zigzag (6,0) one.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2004
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