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Kobayashi H, Takeuchi K, Morinaga Y, Honda H, Yamamoto M, Odanaka Y, Inagaki M. Inter-Spin Interactions of 1D Chains of Different-Sized Nitroxide Radicals Incorporated in the Organic 1D Nanochannels of Tris( o-phenylenedioxy)cyclotriphosphazene. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2022. [DOI: 10.1246/bcsj.20220062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hirokazu Kobayashi
- Faculty of Arts and Sciences at Fujiyoshida, Showa University, 4562, Kami-yoshida, Fuji-yoshida-shi, Yamanashi, 403-0005, Japan
| | - Kanae Takeuchi
- Department of Chemistry, College of Humanities and Sciences, Nihon University, 3-25-40, Sakura-jo-sui, Setagaya-ku, Tokyo, 156-8550, Japan
| | - Yuka Morinaga
- Department of Chemistry, College of Humanities and Sciences, Nihon University, 3-25-40, Sakura-jo-sui, Setagaya-ku, Tokyo, 156-8550, Japan
| | - Hidehiko Honda
- Faculty of Arts and Sciences at Fujiyoshida, Showa University, 4562, Kami-yoshida, Fuji-yoshida-shi, Yamanashi, 403-0005, Japan
| | - Masato Yamamoto
- Faculty of Arts and Sciences at Fujiyoshida, Showa University, 4562, Kami-yoshida, Fuji-yoshida-shi, Yamanashi, 403-0005, Japan
| | - Yuki Odanaka
- Department of Pharmaceutical Sciences, Division of Bioanalytical Chemistry, Showa University, 1-5-8, Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Masahiro Inagaki
- Faculty of Arts and Sciences at Fujiyoshida, Showa University, 4562, Kami-yoshida, Fuji-yoshida-shi, Yamanashi, 403-0005, Japan
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Kobayashi H, Mori T, Morinaga Y, Fujimori E, Akiniwa K, Iwahori F. Electron Spin Resonance Study of Molecular Orientation and Dynamics of Phenyl Imino and Nitronyl Nitroxide Radicals in Organic 1D Nanochannels of Tris( o-phenylenedioxy)cyclotriphosphazene. J Phys Chem A 2018; 122:5493-5502. [PMID: 29878777 DOI: 10.1021/acs.jpca.8b01806] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Imino and nitronyl nitroxide (IN and NN, respectively) radicals such as phenyliminonitroxide (PhIN) and phenylnitronylnitroxide (PhNN), respectively, were dispersed in the organic 1D nanochannels of tris( o-phenylenedioxy)cyclotriphosphazene (TPP). Electron spin resonance (ESR) measurements were conducted on these inclusion compounds (ICs) in the temperature range 4.2-300 K. The modulated-septet ESR spectra of TPP ICs using PhIN observed in the range 165-258 K were reproduced with the EasySpin program package using a model in which some of the PhIN molecules underwent uniaxial rotational diffusion in the TPP nanochannels around the molecular long axis corresponding to the principal y-axis of the g tensor. However, for the TPP IC using PhNN, complicated ESR spectra were observed, which were not consistent with the modulated quintet observed in solution or in the fast-motion limit in solids. These spectra were reproduced by the superposition of a quintet originating from rotational diffusion of PhNN molecules and a septet based on rotational diffusion of PhIN molecules generated in the synthetic process. The rotational diffusion activation energies of PhIN and PhNN in the TPP nanochannels were estimated to be 19 and 45 kJ mol-1 using an Arrhenius plot, respectively. These were consistent with that for NN radicals in the 1D nanochannels of 2,4,6-tris(4-chlorophenoxy)-1,3,5-triazine (CLPOT) (37-54 kJ mol-1) with a larger pore diameter than TPP reported in our previous study, or with that for 4-substituted-2,2,6,6-tetramethyl-1-piperidinyloxyl (4-X-TEMPO) in TPP nanochannels (5-26 kJ mol-1) with regard to molecular size or host-guest or guest-guest interactions. These results indicate that not only the NN group but also IN may be used for the clarification of chemical or biological structures of nanomaterials such as nanosized cavities.
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Affiliation(s)
- Hirokazu Kobayashi
- Faculty of Arts and Sciences at Fujiyoshida , Showa University , 4562, Kami-yoshida , Fuji-yoshida-shi, Yamanashi 403-0005 , Japan
| | - Takanori Mori
- Department of Chemistry, College of Humanities and Sciences , Nihon University , 3-25-40, Sakura-jo-sui , Setagaya-ku, Tokyo 156-8550 , Japan
| | - Yuka Morinaga
- Department of Chemistry, College of Humanities and Sciences , Nihon University , 3-25-40, Sakura-jo-sui , Setagaya-ku, Tokyo 156-8550 , Japan
| | - Etsuko Fujimori
- Department of Chemistry, College of Humanities and Sciences , Nihon University , 3-25-40, Sakura-jo-sui , Setagaya-ku, Tokyo 156-8550 , Japan
| | - Kento Akiniwa
- Graduate School of Integrated Basic Sciences, College of Humanities and Sciences , Nihon University , 3-25-40, Sakura-jo-sui , Setagaya-ku, Tokyo 156-8550 , Japan
| | - Fumiyasu Iwahori
- Department of Chemistry, College of Humanities and Sciences , Nihon University , 3-25-40, Sakura-jo-sui , Setagaya-ku, Tokyo 156-8550 , Japan
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Kobayashi H, Furuhashi Y, Nakagawa H, Asaji T. ESR study of molecular orientation and dynamics of TEMPO derivatives in CLPOT 1D nanochannels. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2016; 54:641-649. [PMID: 27001507 DOI: 10.1002/mrc.4423] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Revised: 01/15/2016] [Accepted: 02/09/2016] [Indexed: 06/05/2023]
Abstract
The molecular orientations and dynamics of 2,2,6,6-tetramethyl-1-piperidinyloxyl (TEMPO) radical derivatives with large substituent groups at the 4-position (4-X-TEMPO) in the organic one-dimensional nanochannels within the nanosized molecular template 2,4,6-tris(4-chlorophenoxy)-1,3,5-triazine (CLPOT) were examined using ESR. The concentrations of guest radicals, including 4-methoxy-TEMPO (MeO-TEMPO) or 4-oxo-TEMPO (TEMPONE), in the CLPOT nanochannels in each inclusion compound (IC) were reduced by co-including 4-substituted-2,2,6,6-tetramethylpiperidine (4-R-TEMP) compounds at a ratio of 1 : 30-1 : 600. At higher temperatures, the guest radicals in each IC underwent anisotropic rotational diffusion in the CLPOT nanochannels. The rotational diffusion activation energy, Ea , associated with MeO-TEMPO or TEMPONE in the CLPOT nanochannels (6-7 kJ mol(-1) ), was independent of the size and type of substituent group and was similar to the Ea values obtained for TEMPO and 4- hydroxy-TEMPO (TEMPOL) in our previous study. However, in the case in which TEMP was used as a guest compound for dilution (spacer), the tilt of the rotational axis to the principal axis system of the g-tensor, and the rotational diffusion correlation time, τR , of each guest radical in the CLPOT nanochannels were different from the case with other 4-R-TEMP. These results indicate the possibility of controlling molecular orientation and dynamics of guest radicals in CLPOT ICs through the appropriate choice of spacer. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Hirokazu Kobayashi
- Department of Chemisty, College of Humanities and Sciences, Nihon University, 3-25-40, Sakura-jo-sui, Setagaya-ku, Tokyo, 156-8550, Japan
| | - Yuta Furuhashi
- Department of Chemisty, College of Humanities and Sciences, Nihon University, 3-25-40, Sakura-jo-sui, Setagaya-ku, Tokyo, 156-8550, Japan
| | - Haruka Nakagawa
- Department of Chemisty, College of Humanities and Sciences, Nihon University, 3-25-40, Sakura-jo-sui, Setagaya-ku, Tokyo, 156-8550, Japan
| | - Tetsuo Asaji
- Department of Chemisty, College of Humanities and Sciences, Nihon University, 3-25-40, Sakura-jo-sui, Setagaya-ku, Tokyo, 156-8550, Japan
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Kobayashi H, Aoki K, Asaji T. Dynamics of TEMPOL Radicals in TPP 1D Nanochannels and Different Molecular Orientation from Other TEMPO Derivatives. CHEM LETT 2015. [DOI: 10.1246/cl.150185] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hirokazu Kobayashi
- Department of Chemistry, College of Humanities and Sciences, Nihon University
| | - Kento Aoki
- Department of Chemistry, College of Humanities and Sciences, Nihon University
| | - Tetsuo Asaji
- Department of Chemistry, College of Humanities and Sciences, Nihon University
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Unesaki H, Kato T, Watase S, Matsukawa K, Naka K. Polymorph Control of Luminescence Properties in Molecular Crystals of a Platinum and Organoarsenic Complex and Formation of Stable One-Dimensional Nanochannel. Inorg Chem 2014; 53:8270-7. [DOI: 10.1021/ic500550y] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Hikaru Unesaki
- Department
of Chemistry and Materials Technology, Graduate School of Science
and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Takuji Kato
- Department
of Chemistry and Materials Technology, Graduate School of Science
and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Seiji Watase
- Osaka Municipal Technical Research Institute, 1−6-50 Morinomiya, Joto-ku, Osaka 536−8533, Japan
| | - Kimihiro Matsukawa
- Osaka Municipal Technical Research Institute, 1−6-50 Morinomiya, Joto-ku, Osaka 536−8533, Japan
| | - Kensuke Naka
- Department
of Chemistry and Materials Technology, Graduate School of Science
and Technology, Kyoto Institute of Technology, Goshokaido-cho, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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Surface functionalization of phosphazenenanosphere derivatives by Schiff-base-assisted metal complexes through a Si-spacer. J IND ENG CHEM 2014. [DOI: 10.1016/j.jiec.2013.10.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Kobayashi H, Morinaga Y, Fujimori E, Asaji T. ESR Study of Molecular Orientation and Dynamics of Nitronyl Nitroxide Radicals in CLPOT 1D Nanochannels. J Phys Chem A 2014; 118:4907-17. [DOI: 10.1021/jp503681b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hirokazu Kobayashi
- Department of Chemisty, College
of Humanities and Sciences, Nihon University, 3-25-40, Sakura-jo-sui, Setagaya-ku, Tokyo 156-8550, Japan
| | - Yuka Morinaga
- Department of Chemisty, College
of Humanities and Sciences, Nihon University, 3-25-40, Sakura-jo-sui, Setagaya-ku, Tokyo 156-8550, Japan
| | - Etsuko Fujimori
- Department of Chemisty, College
of Humanities and Sciences, Nihon University, 3-25-40, Sakura-jo-sui, Setagaya-ku, Tokyo 156-8550, Japan
| | - Tetsuo Asaji
- Department of Chemisty, College
of Humanities and Sciences, Nihon University, 3-25-40, Sakura-jo-sui, Setagaya-ku, Tokyo 156-8550, Japan
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