Formation of the newly greenish organized molecular film of long-chain diynoic acid derivatives by photomerization and its structural study using near-edge X-ray absorption fine structures (NEXAFS) spectroscopy

Article Abstract:

The effect of molecular arrangements with annealing on photopolymerization in the Langmuir-Blogett films of 10,12-pentacosydiynoic acid cadmium salt was investigated using the UV- vis spectroscopy, out of plane and in-plane X-ray diffraction (XRD), and polarized near-edge X-ray absorption fine structure (NEXAFS) spectroscopy. The results indicate the color phase transition of diacetylene derivatives with photopolymerization induced the arrangement of the conjugated backbone, supported by a shift of the C1s-Pt* band in the NEXAFS spectra.

Usage, X-ray diffraction, Acid-base chemistry

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Self-assembly of stimuli-responsive water-soluble [60] fullerene end-capped ampholytic block copolymer

Article Abstract:

A well-defined and water-soluble C60-containing ampholytic block copolymer was synthesized by atom transfer radical polymerization (ATRP), and its stimuli-responsive self-assembly behavior was systematically characterized by dynamic light scattering (DLS) and TEM. The amphiphilic mono-C60 end-capped block copolymer shows enhanced solubility in aqueous medium at room and elevated temperatures and at a low and high pH but phase seperates at intermediate pH between 5.4 and 8.8.

Chemical properties, Fullerenes

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A model for self-assembly in solution (super 1)

Article Abstract:

A model treating the competition under thermodynamic control, between self-assembly and nonlinear random polymerization is presented. The fundamental quantities on which the treatment is based are the effective molarity (EM) of the assembly and the equilibrium constant for the intermolecular model reaction between monofunctional reactants.

Models, Thermodynamics

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