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Journal Articles

Insights into proton dynamics in a photofunctional salt-cocrystal continuum; Single-crystal X-ray, neutron diffraction, and Hirshfeld atom refinement

Yano, Yoshio*; Ono, Toshikazu*; Ohara, Takashi; Hisaeda, Yoshio*

Chemistry; A European Journal, 27(71), p.17802 - 17807, 2021/12

 Times Cited Count:3 Percentile:27.22(Chemistry, Multidisciplinary)

Journal Articles

Biomolecule-assisted synthesis of hierarchical multilayered boehmite and alumina nanosheets for enhanced molybdenum adsorption

Saptiama, I.*; Kaneti, Y. V.*; Yuliarto, B.*; Kumada, Hiroaki*; Tsuchiya, Kunihiko; Fujita, Yoshitaka; Malgras, V.*; Fukumitsu, Nobuyoshi*; Sakae, Takeji*; Hatano, Kentaro*; et al.

Chemistry; A European Journal, 25(18), p.4843 - 4855, 2019/03

 Times Cited Count:14 Percentile:55.31(Chemistry, Multidisciplinary)

The effective utilization of various biomolecules for creating a series of mesoporous boehmite ($$gamma$$-AlOOH) and gamma-alumina ($$gamma$$-Al$$_{2}$$O$$_{3}$$) nanosheets with unique hierarchical multilayered structures is demonstrated. The nature and concentration of the biomolecules strongly influence the degree of the crystallinity, the morphology, and the textural properties of the resulting $$gamma$$-AlOOH and $$gamma$$-Al$$_{2}$$O$$_{3}$$ nanosheets, allowing for easy tuning. The hierarchical $$gamma$$-AlOOH and $$gamma$$-Al$$_{2}$$O$$_{3}$$ multilayered nanosheets synthesized by using biomolecules exhibit enhanced crystallinity, improved particle separation, and well-defined multilayered structures compared to those obtained without biomolecules. More impressively, these $$gamma$$-AlOOH and $$gamma$$-Al$$_{2}$$O$$_{3}$$ nanosheets possess high surface areas up to 425 and 371 m$$^{2}$$/g, respectively, due to their mesoporous nature and hierarchical multilayered structure. When employed for molybdenum adsorption toward medical radioisotope production, the hierarchical $$gamma$$-Al$$_{2}$$O$$_{3}$$ multilayered nanosheets exhibit Mo adsorption capacities of 33.1$$sim$$40.8mg-Mo/g.

Journal Articles

Quantum simulation verifies the stability of an 18-coordinated actinium-helium complex

Ozama, Eiki*; Adachi, Sadia*; Takayanagi, Toshiyuki*; Shiga, Motoyuki

Chemistry; A European Journal, 24(48), p.12716 - 12721, 2018/08

 Times Cited Count:5 Percentile:21.08(Chemistry, Multidisciplinary)

The structures of trivalent actinium cation in helium clusters (Ac$$^{3+}$$He$$_n^{}$$) have been studied by quantum path integral molecular dynamics simulations with different cluster sizes, $$n$$ = 18-200. The nuclear quantum effect of helium atoms plays an important role in the vibrational amplitude of the Ac$$^{3+}$$-He complex at low temperatures (1-3 K) where the complex is stable. We found that the coordination number of helium atoms comprising the first solvation shell can be as high as eighteen. In this case, the helium atoms are arranged in D$$_{4d}^{}$$ symmetry. The Ac$$^{3+}$$-He$$_{18}^{}$$ complex becomes more rigid as the cluster increases in sizes, implying that it becomes more stable. The simulation results are based on an accurate description of the Ac$$^{3+}$$-He interaction using relativistic ab initio calculations.

Journal Articles

Proton order-disorder phenomena in a hydrogen-bonded rhodium-$$eta$$$$^{5}$$-semiquinone complex; A Possible dielectric response mechanism

Mitsumi, Minoru*; Ezaki, Kazunari*; Komatsu, Yuki*; Toriumi, Koshiro*; Miyato, Tatsuya*; Mizuno, Motohiro*; Azuma, Nobuaki*; Miyazaki, Yuji*; Nakano, Motohiro*; Kitagawa, Yasutaka*; et al.

Chemistry; A European Journal, 21(27), p.9682 - 9696, 2015/06

 Times Cited Count:7 Percentile:25.57(Chemistry, Multidisciplinary)

Journal Articles

Mesoporous silica particles as topologically crosslinking fillers for poly($$N$$-isopropylacrylamide) hydrogels

Miyamoto, Nobuyoshi*; Shimasaki, Kotaro*; Yamamoto, Kosuke*; Shintate, Morio*; Kamachi, Yuichiro*; Bastakoti, B. P.*; Suzuki, Norihiro*; Motokawa, Ryuhei; Yamauchi, Yusuke*

Chemistry; A European Journal, 20(46), p.14955 - 14958, 2014/11

 Times Cited Count:18 Percentile:50.25(Chemistry, Multidisciplinary)

Journal Articles

Unravelling the mechanism of force-induced ring-opening of benzocyclobutenes

Ribas-Arino, J.*; Shiga, Motoyuki; Marx, D.*

Chemistry; A European Journal, 15(48), p.13331 - 13335, 2009/11

 Times Cited Count:40 Percentile:71.73(Chemistry, Multidisciplinary)

By exploring force-transformed potential energy surfaces of both $$cis$$ and $$trans$$ 1,2-disubstitutedbenzocyclobutene molecule, we unravel the mechanism of force-induced ring-opening. The expected conrotatory process of $$cis$$ reactant leading to $$E$$,$$Z$$ product is only observed at very small forces, whereas disrotatory ring-opening yields $$E$$,$$E$$ diene at larger forces, which is shown to be a concerted process.

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