Výsledky vyhledávání - "Takuhiro Otsuka"

Reversible colour/luminescence colour changes of tetracyanoruthenium(II) complexes by sorption/desorption of water molecules in crystals

Autor: Shingo Hattori, Tomoya Nagai, Akiko Sekine, Takuhiro Otsuka, Kazuteru Shinozaki

Publikováno v: Dalton transactions (Cambridge, England : 2003). 51(4)

We report reversible vapochromic behaviour of tetracyanorutenium(ii) complexes by the sorption/desorption of water molecules in crystal.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::10e74cb7b6b8beb8ec432892272442ec
https://pubmed.ncbi.nlm.nih.gov/34989371

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Prolonged Lifetime of Near-IR Emission due to a Reservoir State in a Phenylene-linked Copper(II) Porphyrin–Zinc(II) Porphyrin Dimer

Autor: Takuhiro Otsuka, Motoko S. Asano, Masanori Shibuki

Publikováno v: Chemistry Letters. 45:1114-1116

A phenylene-linked copper(II) porphyrin–zinc(II) porphyrin dimer exhibits near-IR emission, the lifetime of which is 310 ns at 300 K in toluene. Based on transient absorption measurements and emission temperature dependence, the observed emission w

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f81ff310b0e85d1c33b7720e1fa8b1a2
https://doi.org/10.1246/cl.160442

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Anisotropic energy-transfer in encounter complex in aqueous solutions: Ligand congeniality between photo-excited mixed-ligand tris(α,α′-diimine)-ruthenium(II) [Ru(phen)3−(4dmb) ]2+ and tris(malonato)chromate(III) [Cr(mal)3]3−

Autor: Takeshi Akaboshi, Youkoh Kaizu, Takuhiro Otsuka

Publikováno v: Inorganica Chimica Acta. 421:385-391

Energy-transfer rate-constants, k1, from photo-excited mixed-ligand [Ru(phen)3−n(4dmb)n]2+ (n = 0–3; phen = 1,10-phenanthroline, 4dmb = 4,4′-dimethyl-2,2′-bipyridine) to [Cr(O–O)3]3− (O–O2− = ox2− ((COO−)2), mal2− (CH2(COO−)2)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b163ad160d8dc323015c964d4ac12fae
https://doi.org/10.1016/j.ica.2014.06.038

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Imbalance between Anion and Cation Dstribution at Ice Interface with Liquid Phase in Frozen Electrolyte as Evaluated by Fluorometric Measurements of pH

Autor: Tetsuo Okada, Takuhiro Otsuka, Hiroki Watanabe, Makoto Harada

Publikováno v: Journal of Physical Chemistry C. 118:15723-15731

When an aqueous electrolyte is frozen, anions and cations are distributed between liquid and ice phases in different fashions. This partition imbalance is relaxed by the transfer of H+ and OH– to each phase, resulting in the acidification of the li

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::36b22fa93c8013f8e9d1eed7bd4dcd22
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100720470

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Enhanced Intersystem Crossing Due to Long-range Exchange Interaction in Porphyrin Heterodimers: Dependence of Paramagnetic Species

Autor: Kazuma Okamura, Takeshi Fujii, Youkoh Kaizu, Takuhiro Otsuka, Motoko S. Asano

Publikováno v: Chemistry Letters. 43:471-473

Dependence on paramagnetic species of long-range dynamics was studied by comparing VIVO and copper(II) ions in porphyrin heterodimers. Enhanced intersystem crossing rates induced by a remote unpair...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0c224cb191dfd1ef71e8191f351f8f7e
https://doi.org/10.1246/cl.131096

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Specific salt effects on energy transfer reactions from [Tb(2,6-pyridinedicarboxylate)3]3− to Co(III) complexes in aqueous solutions

Autor: Makoto Morita, Takuhiro Otsuka, Youkoh Kaizu, Munetaka Iwamura

Publikováno v: Journal of Molecular Liquids. 128:71-76

Specific cation and anion effects are investigated on reactions of energy transfer from [Tb(dpa)3]3− (dpa = 2,6-pyridinedicarboxylate) to [Co(bpy)3]3+ (bpy = 2,2′-bipyridine), [Co(en)3]3+ (en=ethylenediamine), [Co(pam)3]3+ (pam = 2-aminomethylpyr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3fcc03d7267b2e31055c3c9cef7c4069
https://doi.org/10.1016/j.molliq.2005.11.031

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Hydrogen-bond Networks Involving Protonated Bicapped-Keggin Tetradecavanadophosphate Anions

Autor: Takuto Yamawaki, Katsuhiro Kusaka, Tomoji Ozeki, Takuhiro Otsuka, Setsuko Nakamura

Publikováno v: Journal of Cluster Science. 17:245-256

Tetraphenylphosphonium salts of protonated tetradecavanadophosphate (PV14) anions, [(C6H5)4P]4H5PV14O42·5H2O (1) and [(C6H5)4P]2H7PV14O42·6H2O (2), have been synthesized and their crystal structures have been determined. Compound 1 crystallizes in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c45fd4bd93ddc7c7e7bbe2954c8c8bc6
https://doi.org/10.1007/s10876-006-0064-y

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Effect of ligand congeniality on energy transfer reaction between photo-excited tris(bipyridine)ruthenium(II) and chromate(III) complexes in aqueous solutions

Autor: Takuhiro Otsuka, Munetaka Iwamura, Youkoh Kaizu

Publikováno v: Inorganica Chimica Acta. 359:1351-1356

Energy-transfer rate-constants from photo-excited [Ru(N–N) 3 ] 2+ (N–N = 2,2′-bipyridine (bpy), 4,4′-dimethyl-2,2′-bipyridine (4dmb), 5,5′-dimethyl-2,2′-bipyridine (5dmb)) to [Cr(O–O) 3 ] 3− (O–O 2− = ox 2− ((COO − ) 2 ), ma

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d3802bdf4f1a4070d24d2d1130e24054
https://doi.org/10.1016/j.ica.2005.12.049

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Specific cation effect on quenching reactions of excited tris(α,α′-diimine)ruthenium(II) and tris(2,2′-bipyridine)chromium(III) by tris(oxalato)- and tris(malnato)chromates(III) in aqueous solutions

Autor: Munetaka Iwamura, Youkoh Kaizu, Takuhiro Otsuka

Publikováno v: Inorganica Chimica Acta. 357:1565-1570

Specific salt effects were studied on the quenching reaction of excited [Ru(N–N)3]2+ (N–N=2,2′-bipyridine (bpy), 1,10-phenanthrorine (phen)) and [Cr(bpy)3]3+ by [Cr(ox)3]3− (ox=oxalate ion) and [Cr(mal)3]3− (mal=malonate ion) in aqueous sol

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::dd7324d2dd083fd712a7d82d341831d2
https://doi.org/10.1016/j.ica.2003.11.028

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Specific cation effect on quenching reactions of excited tris(α,α′-diimine) ruthenium(II) and chromium(III) complexes by cyanide complexes in aqueous solutions

Autor: Munetaka Iwamura, Takuhiro Otsuka, Youkoh Kaizu

Publikováno v: Inorganica Chimica Acta. 333:57-62

Specific salt effects were studied on the quenching reaction of excited [Ru(NN) 3 ] 2+ (NN=2,2′-bipyridine(bpy), 1,10-phenanthrorine(phen)) and [Cr(bpy) 3 ] 3+ by [Cr(CN) 6 ] 3− , [Fe(CN) 6 ] 3− and [Ni(CN) 4 ] 2− in aqueous solutions a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::495bde5b181a01e530fe17d667eb699e
https://doi.org/10.1016/s0020-1693(02)00756-9

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