W
Wataru Kosaka
Researcher at Tohoku University
Publications - 88
Citations - 2407
Wataru Kosaka is an academic researcher from Tohoku University. The author has contributed to research in topics: Paramagnetism & Chemistry. The author has an hindex of 23, co-authored 81 publications receiving 2041 citations. Previous affiliations of Wataru Kosaka include University of Tokyo & Kanazawa University.
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Journal ArticleDOI
Shape-Memory Nanopores Induced in Coordination Frameworks by Crystal Downsizing
Yoko Sakata,Shuhei Furukawa,Mio Kondo,Kenji Hirai,Nao Horike,Yohei Takashima,Hiromitsu Uehara,Nicolas Louvain,Mikhail Meilikhov,Takaaki Tsuruoka,Seiji Isoda,Wataru Kosaka,Osami Sakata,Susumu Kitagawa +13 more
TL;DR: It is demonstrated that the crystal downsizing of twofold interpenetrated frameworks of [Cu2(dicarboxylate)2(amine)]n regulates the structural flexibility and induces a shape-memory effect in the coordination frameworks.
Journal ArticleDOI
Self-Accelerating CO Sorption in a Soft Nanoporous Crystal
Hiroshi Sato,Wataru Kosaka,Ryotaro Matsuda,Akihiro Hori,Yuh Hijikata,Rodion V. Belosludov,Shigeyoshi Sakaki,Masaki Takata,Susumu Kitagawa +8 more
TL;DR: It is reported that a porous coordination polymer containing Cu2+ ions can selectivity bind CO through serial structural changes reminiscent of allosteric effects in proteins, and crystallographic evidence that CO molecules can coordinate with copper(II) ions is presented.
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Observation of an Fe(II) spin-crossover in a cesium iron hexacyanochromate.
TL;DR: This work observed a spin-crossover phenomenon in a cesium iron hexacyanochromate, which is a Prussian blue analogue, which has a thermal phase transition with transition temperatures of 211 K and 238 K due to aspin-c crossover on FeII sites.
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Highly proton conductive nanoporous coordination polymers with sulfonic acid groups on the pore surface
Padmini Ramaswamy,Ryotaro Matsuda,Wataru Kosaka,George Akiyama,Hyung Joon Jeon,Susumu Kitagawa +5 more
TL;DR: Three new sulfonated porous coordination polymers/metal-organic frameworks have been synthesized using solvothermal methods and exhibit high proton conductivity at a low humidity of 60% RH (relative humidity) at ambient temperature.
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X-ray illumination induced Fe(II) spin crossover in the Prussian blue analogue cesium iron hexacyanochromate.
Dionisis Papanikolaou,Serena Margadonna,Wataru Kosaka,Shin-ichi Ohkoshi,Michela Brunelli,Kosmas Prassides +5 more
TL;DR: It is possible to use X-ray light in a controllable and efficient way to induce photoswitching between the ground and hidden or inaccessible excited states in suitably selected multistable materials in the bulk.