Corporate Research and Development Group

Tenri, Japan

Corporate Research and Development Group

Tenri, Japan
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Mizusaki M.,Corporate Research and Development Group | Yamada Y.,Corporate Research and Development Group | Obara S.,Photosensitive Materials Research Center | Anzai K.,Photosensitive Materials Research Center | Tada K.,Photosensitive Materials Research Center
Polymer Journal | Year: 2011

A time-of-flight study of a new hyperbranched oligomer film composed of thiophene and N,N,N',N'-tetraphenyl-1,3-phenylenediamine was reported. A sandwich cell composed of indium tin oxide (ITO), SH-oligothiophene and an alloy of Mg and Al (Mg Al), ITO/SH-oligothiophene/Mg Al, was prepared. The ITO substrate was masked, patterned and cleaned by sonication in 0.2M aqueous NaOH and deionized water. A SH-oligothiophene film was prepared from the chloroform solution onto the cleaned ITO substrate by spin coating. TOF (time of flight) measurements for the sandwich cell of ITO/SH-oligothiophene/Mg Al were carried out with a conventional setup. A pulsed N2 laser was used to generate photocarrier in the SH-oligothiophene film. The SH-oligothiophene dissolves in chloroform up to a concentration of δ 20mg ml-1. By illuminating the N2 laser light from the ITO side of the ITO/SH-oligothiophene/Mg Al cell, photoexcited carriers of hole and electron generate at the surface of the SH-oligothiophene film.


Mizusaki M.,Corporate Research and Development Group | Nakamura K.,Corporate Research and Development Group
Chemistry Letters | Year: 2014

Effect on stability of liquid crystal (LC) alignment due to formation of polymer clusters on alignment films produced from the copolymer of 1,3,5-triacryloyloxyadamantane and 4,4- diacryloyloxybiphenyl was investigated with morphology analysis. Experimental results revealed that the stability of the LC alignment was increased because the polymer clusters effectively held the LC molecules adjacent to the polymer clusters. © 2014 The Chemical Society of Japan.


Mizusaki M.,Corporate Research and Development Group
Chemistry Letters | Year: 2015

The interactions of hydrophobically random-modified and end-capped poly(2-(acrylamido)-2-methylpropanesulfonate)s (PAMPSs) with the nonionic surfactant dodecyl hexa(oxyethylene) glycol monoether (C12E6) were investigated by fluorescence spectroscopic technique of labeled pyrene. The results revealed that the random-modified PAMPS interacts with C12E6 and that the intrapolymer micelle formed from the polymer gets disrupted. In contrast, the end-capped PAMPS interacts without disruption of the multipolymer aggregate formed from the polymer at a comparably low concentration range of C12E6. The conformation of the polymersurfactant complex depends on the position of the hydrophobic group in the polymer chains. © 2015 The Chemical Society of Japan.


Accessibility of water-soluble fluorescence quencher, thallium nitrate (Tl+), to pyrene (Py) sites of the Py-labeled random copolymer of sodium 2-(acrylamido)-2-methylpropanesulfonate and 50 mol% N-dodecylmethacrylamide (PAMPS-DodM-Py) was investigated with and without addition of the unlabeled random copolymer of N-isopropylacrylamide and 1.5mol% N-dodecylacrylamide (PNIPAM-DodA) in aqueous solutions. The results revealed that the accessibility of Tl+ ions to the Py sites of PAMPS-DodM-Py was decreased by adding PNIPAM-DodA to PAMPS-DodM-Py, anticipating that more stable hydrophobic microdomain was formed due to the interaction between PAMPS-DodM-Py and PNIPAM-DodA. © 2015 The Chemical Society of Japan.


The interaction of hydrophobically random-modified and end-capped poly[2-(acrylamido)-2-methylpropanesulfonate]s, which are polyanions, with positively and negatively charged surfactants was investigated by steady-state fluorescence spectroscopy of labeled pyrene. The results revealed that both the polyanions interact with the positively charged surfactants more easily compared with the negatively charged surfactants although the polyanions do interact with the negatively charged surfactants due to hydrophobic interaction. Moreover, the endcapped polyanion had stronger electrostatic attraction with the positively charged surfactant compared with the random-modified polyanion. © 2015 The Chemical Society of Japan.

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