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Suzuki Yasutaka

Affiliate Master Yamaguchi University

Publish Date (<span class="translation_missing" title="translation missing: en.view.asc">Asc</span>)
Chemistry : an Asian journal Volume 7 Issue 6 pp. 1170 - 1179
published_at 2012-06
Creators : Suzuki Yasutaka Tenma Yuta Nishioka Yukihiro Kawamata Jun Publishers : Wiley-VCH | WILEY-VCH Verlag GmbH & Co. KGaA
Current pharmaceutical biotechnology Volume 13 Issue 14 pp. 2649 - 2654
published_at 2012-11-01
Creators : Tani Seiji Nakagawa Kenta Honda Takuya Saito Hiromasa Suzuki Yasutaka Kawamata Jun Uchida Makiyo Sasaki Akira Kinjo Masataka Publishers : Bentham Science Publishers
Clay science Volume 17 Issue 2 pp. 41 - 45
published_at 2013-06
Creators : Suzuki Yasutaka Tenma Yuta Nishioka Yukihiro Tominaga Makoto Tani Seiji Kawamata Jun Publishers : Clay Research Group of Japan
Chemistry Letters Volume 43 Issue 4 pp. 441 - 443
published_at 2014
Creators : Moritomo Hiroki Nakagawa Kenta Sugihara Hiroyuki Suzuki Yasutaka Kawamata Jun Publishers : 日本化学会
Journal of Nanoscience and Nanotechnology Volume 14 Issue 4 pp. 2895 - 2900
published_at 2014-04
Creators : Suzuki Yasutaka Yamamoto Kota Mikata Kensuke Nishioka Yukihiro Tani Seiji Kawamata Jun Publishers : American Scientific Publishers
Applied clay science Volume 96 pp. 116 - 119
published_at 2014-07
Creators : Suzuki Yasutaka Sugihara Hiroyuki Satomi Koichiro Tominaga Makoto Mochida Shuhei Kawamata Jun Publishers : Elsevier
Chemistry & education Volume 62 Issue 3 pp. 108 - 111
published_at 2014-03-20
Creators : Kawamata Jun Suzuki Yasutaka Publishers : 公益社団法人 日本化学会 | The Chemical Society of Japan
Journal of Organic Chemistry Volume 79 Issue 20 pp. 9669 - 9677
published_at 2014-09-25
Creators : Takeda Takashi Sugihara Hiroyuki Suzuki Yasutaka Kawamata Jun Akutagawa Tomoyuki Publishers : Williams & Wilkins Co
Chemistry letters Volume 43 Issue 9 pp. 1490 - 1492
published_at 2014
Creators : Tominaga Makoto Mochida Shuhei Sugihara Hiroyuki Satomi Koichiro Moritomo Hiroki Fujii Akinari Tomoyuki Arina Suzuki Yasutaka Kawamata Jun Publishers : Chemical Society of Japan
Journal of the Clay Science Society of Japan Volume 53 Issue 2 pp. 62 - 67
published_at 2015-03-27
Creators : Tominaga Makoto Sugihara Hiroyuki Mochida Shuhei Tani Seiji Suzuki Yasutaka Kawamata Jun Publishers : 日本粘土学会
Applied clay science Volume 104 pp. 245 - 251
published_at 2015-02
Creators : Chakraborty Santanu Bhattacharjee D. Soda Honami Tominaga Makoto Suzuki Yasutaka Kawamata Jun Hussain Syed Arshad Publishers : Elsevier Science Publishers
Journal of materials chemistry. B, Materials for biology and medicine Volume 3 Issue 2 pp. 184 - 190
published_at 2015-01-14
Creators : Niko Yosuke Moritomo Hiroki Sugihara Hiroyuki Suzuki Yasutaka Kawamata Jun Konishi Gen-ichi Publishers : Royal Society of Chemistry
Cell structure and function Volume 39 Issue 2 pp. 125 - 133
published_at 2014
Creators : Moritomo Hiroki Yamada Kengo Kojima Yuki Suzuki Yasutaka Tani Seiji Kinoshita Hazuki Sasaki Akira Mikuni Shintaro Kinjo Masataka Kawamata Jun Publishers : 日本細胞生物学会
J. Mater. Chem. C Volume 3 Issue 27 pp. 7153 - 7158
published_at 2015-07-21
Creators : Fujii S. Suzuki Y. Kawamata J. Tsunashima R. Publishers : Royal Society of Chemistry
Philosophical magazine. Structure and properties of condensed matter Volume 90 Issue 17-18 pp. 2519 - 2527
published_at 2010
Creators : Kawamata Jun Tenma Yuta Suzuki Yasutaka Publishers : Taylor & Francis
Clay sci Volume 14 Issue 6 pp. 229 - 234
published_at 2010-12
Creators : Suzuki Yasutaka Nakagawa Kenta Nishioka Yukihiro Tenma Yuta Kawamata Jun Publishers : the Clay Science Society of Japan
Chemistry Letters Volume 45 Issue 5 pp. 538 - 540
published_at 2016
We measured the three-photon absorption spectra of two europium acetylacetonate-type complexes. The three-photon absorption peak wavelengths of tris(hexafluoroacetylacetonato)europium(III) (Eu(hfa)) and tris(2-naphthoyltrifluoroacetonato)europium(III) (Eu(ntfa)) were 925 and 1025 nm, respectively. The peak values of the 3PA cross-sections of Eu(hfa) and Eu(ntfa) were 1.9 and 13.9 GM (1 GM = 10−82 cm6 s2), respectively. Using Eu(ntfa) as a probe, a three-photon microscope image of a living cell was obtained using a 1030 nm operating femto-second fiber laser as the light-source. Thus, Eu(ntfa) is a fiber laser excitable luminescent probe useful for three-photon microscopy.
Creators : Suzuki Yasutaka Moritomo Hiroki Fuji Akinari Satomi Koichiro Kawamata Jun Yamamoto Masanori Hasegawa Yasuchika Publishers : The Chemical Society of Japan
Japanese Journal of Applied Physics Volume 55 Issue 9
published_at 2016
Near-infrared two-photon absorption of the phosphorescent Ir(III) complex (2,4-pentanedionato-κO2,κO4)bis[2-(6-phenanthridinyl-κN)benzo[b]thien-3-yl-κC]iridium (BTPHSA) was characterized. It exhibited a 800–1200 nm two-photon absorption band, and thus could be electronically excited by 1030-nm femtosecond Ti:sapphire and Yb-doped fiber lasers. By using BTPHSA, oxygen concentrations in human embryonic kidney 293 (HEK293) cells were imaged. These results demonstrate two-photon oxygen sensing of live tissues via easily operable excitation sources.
Creators : Moritomo Hiroki Fujii Akinari Suzuki Yasutaka Yoshihara Toshitada Tobita Seiji Kawamata Jun Publishers : The Japan Society of Applied Physics
Nature chemistry Volume 8 Issue 10 pp. 946 - 952
published_at 2016-10
Ferroelectrics have found a wide range of applications including memory elements, capacitors, and sensors. Molecular f erroelectric crystals have recently attracted growing interest as viable alternatives for conventional ceramic ferroelectrics, especially due to their non toxicity and solution processability. Herein, we show that a class of molecular compounds known as plastic crystals can exhibit ferroelectricity, provided that the constituent molecules are judiciously chosen from polar ionic molecules. The intrinsic features of plastic crystals, e.g. the rotational mot ion of molecules and phase transitions with lattice symmetry changes, provide the crystals with unique ferroelectric properties relative to conventional molecular crystals , i.e. the possibility to flexibly alter the direction of the polarization axis of a grown crystal by applying an electric field. Owing to t he tunability of the crystal orientation together with mechanical deformability, this novel type of molecular crystals represents an attractive functional material, which will undoubtedly find diverse applications.
Creators : Harada Jun Shimojo Takafumi Oyamaguchi Hideaki Hasegawa Hiroyuki Takahashi Yukihiro Satomi Koichiro Suzuki Yasutaka Kawamata Jun Inabe Tamotsu Publishers : Nature Publishing Group
The Journal of Physical Chemistry C Volume 120 Issue 41 pp. 23813 - 23822
published_at 2016-09-30
The interlayer space of clays is an interesting microenvironment to control the properties of included organic materials. In this study, chromic hybrid films consisting of synthetic saponite (SSA) and fluorescent organic molecules with planar p-conjugated systems were fabricated. The hybrid films exhibited reversible fluorescence color switching induced by swelling and drying, which caused the gallery height of SSA to change. Ultraviolet–visible absorption, steady-state and time-resolved fluorescence measurements of the hybrid films strongly suggested that the organic molecules formed an excimer in the swollen interlayer space of SSA, while they were a monomer in the dried interlayer space. The different emission wavelengths of the excimer and monomer resulted in the fluorescence color switching of the hybrid films. The reversibility of the color switching was maintained for at least 50 cycles with no change of fluorescence maxima. These chromic hybrid films represent a novel approach to obtain color switching.
Creators : Tominaga Makoto Oniki Yudai Mochida Shuhei Kasatani Kazuo Tani Seiji Suzuki Yasutaka Kawamata Jun Publishers : American Chemical Society
Applied Clay Science Volume 140 pp. 119 - 123
published_at 2017-05
In presented work dye assemblies with J-type intermolecular coupling, which are well recognized not only for their exciton transport but also for hole and electron transport properties were investigated. The use of materials consisting of J-type dye assemblies can be significantly enhanced if their photonic properties can be controlled by some external stimuli. For these reasons the switching abilities between J-type aggregated and non-aggregated states of a cationic cyanine dye, 1,1′-diethyl-2,2′-cyanine (pseudoisocyanine, PIC) intercalated in the interlayer space of synthetic saponite (Sap) were compared. The switching was performed by adding and removing of dimethyl sulfoxide (DMSO) from the interlayer space. The PIC/Sap hybrid film prepared at 70% CEC loading level has shown excellent stability within 20 cycles of photophysical response after adding and removing of DMSO from the interlayer space, indicating that presented experimental approach can be useful in the future development of artificial light harvesting or semiconductor systems with controllable properties.
Creators : Marian Matejdes Himeno Daisuke Suzuki Yasutaka Kawamata Jun Publishers : Elsevier B.V. All
Clay Science Volume 19 Issue 4 pp. 79 - 83
published_at 2015
We have found that X-ray diffraction peaks of clay-organic hybrid films were narrowed after swelling followed by removing of solvent. We fabricated hybrid films consisting of natural montmorillonite (Mont), synthetic saponite (SSA) or synthetic stevensite (SST) and a cationic organic molecule. Full width at half maximum (FWHM) of 001 reflection of as-prepared Mont hybrid was 1.58 2θ degree whereas that after swelling and solvent removing procedure was 0.84 2θ degree. This decreasing of FWHM indicated that the improvement of packing order of clay particles in clay-organic hybrid was occurred during swelling and solvent removing procedure. Similar decreasing of FWHM was also found in hybrids consisting of SSA or SST. Improvement of packing order of hybrid was found to accompany suppression of light scattering of hybrid at the same time.
Creators : Suzuki Yasutaka Himeno Daisuke Tominaga Makoto Tani Seiji Nozaki Koji Kawamata Jun Publishers : The Clay Science Society of Japan