研究者詳細 - 松田　亮太郎

Magnetic properties of molecular oxygen adsorbed in micro-porous metal-organic solids 査読有り

Tatsuo C. Kobayashi, Akira Matsuo, Megumi Suzuki, Koichi Kindo, Ryo Kitaura, Ryotaro Matsuda, Susumu Kitagawa

Progress of Theoretical Physics Supplement 159 巻 ( 159 ) 頁： 271 - 279 2005年

記述言語：英語掲載種別：研究論文（学術雑誌）

The magnetic properties of O2adsorbed in nanochannels of porous metal-organic solids CPL-1 and CPL-pl have been investigated by means of high-field magnetization process measurement. The contribution from adsorbed O2shows the metamagnetic-like behavior in both compounds. We propose "the field-induced rearrangement mechanism" as the explanation for the metamagnetic-like behavior. It is known for the O2-O2dimer that the magnetic interaction depends strongly on the intermolecular distance and the orientation of molecular axes. It is considered naturally that the stable arrangement with saturated magnetic moment in the sufficient high field is different from the H-structure which is stable at zero field.

DOI： 10.1143/PTPS.159.271

Direct Observation of Hydrogen Molecules adsorbed in a Coordination Polymer

Kubota Yoshiki, Takata Masaki, Matsuda Ryotaro, Kitaura Ryo, Kitagawa Susumu, Kobayashi Tatsuo C., Kato Kenichi, Sakata Makoto

ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES 61 巻頁： C403-C403 2005年

Dynamics of guests in microporous coordination polymers studied by solid state NMR and X-ray analysis 査読有り

S Horike, R Matsuda, S Kitagawa

NANOPOROUS MATERIALS IV 156 巻頁： 725 - 732 2005年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCIENCE BV

Molecular motions of methanol and aromatic molecules (benzene, toluene, p-xylene) adsorbed in ID nanochannels of pillared-layer coordination polymers with paramagnetic metal ions have been studied by H-2 NMR together with X-ray crystallography. NMR spectra at various temperatures and Rietveld analyses of powder X-ray diffractions represented that the characteristic shape and periodic potential of each micropore confined guests in highly restricted motions and ordering even though the guests are physisorbed.

Flexible coordination polymers as novel porous materials 査読有り

TK Maji, R Matsuda, S Kitagawa

NANOPOROUS MATERIALS IV 156 巻頁： 497 - 504 2005年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCIENCE BV

In this manuscript, we report synthesis and crystal structure of a novel coordination polymer of Cd(II), {[Cd(pzdc)(bpp)(H2O)](3)H2O}(n) (3) and porous functionalities of ([Cd(pzdc)(azpy)[2H(2)O}(n). (1), {[Cd(pzdc)(bpee)]1.5H(2)O}(n) (2) and 3 [where pzdc pyrazine-2,3-dicarboxylate, azpy = 4,4'-azopyridine; bpee = 1,2-bis-(4-pyridyl)ethylene and bpp = 1,3-bis(4-pyridyl)propane]. Structure determination reveals that complex 3 is a 3D porous framework with one dimensional micro-channel along the crystallographic c-axis (channel size: 8.4 x 4.2 angstrom; V-void = 17.2%), where each Cd(II) is in distorted octahedral environment and attached with two pzdc, two bpp ligand and one water molecule. The TGA analysis shows that the dehydrated framework is stable up to 180 degrees C and XRPD measurement suggests that the dehydrated materials become amorphous, but with exposure to the water vapor regenerates the original framework. Adsorption measurement shows that water molecules are adsorbed in two-step process, whereas MeOH molecules in a single step and both the sorption phenomena occur with large hysteresis.

Motion of methanol adsorbed in porous coordination polymer with paramagnetic metal ions 査読有り

Satoshi Horike, Ryotaro Matsuda, Ryo Kitaura, Susumu Kitagawa, Takahiro Iijima, Kazunaka Endo, Yoshiki Kubota, Masaki Takata

Chemical Communications 10 巻頁： 2152-2153 2004年11月

Guest shape-responsive fitting of porous coordination polymer with shrinkable framework 査読有り

Ryotaro Matsuda, Ryo Kitaura, Susumu Kitagawa, Yoshiki Kubota, Tatsuo C. Kobayashi, Satoshi Horike, Masaki Takata

Journal of the American Chemical Society 126 巻頁： 14063-14070 2004年11月

記述言語：英語掲載種別：研究論文（学術雑誌）

measured (pzdc = pyrazine-2,3-dicarboxylate, bpy = 4,4′-bipyridine) (where G = H2O for CPL-2 ⊃ H2O, G = benzene for CPL-2 ⊃ benzene, and G = void for the apohost). The structures of apohost and CPL-2 ⊃ benzene were determined from Rietveld analysis. Adsorption of benzene in the channels induced a remarkable contraction in the crystal (b axis; 6.8%, volume; 4.9%), although the channels were occupied by the benzene molecules. This crystal transformation provides a new pore structure that is well suited for benzene molecules, and we denote it as a "shape-responsive fitting" transformation. This type of pore gives rise to a new guideline: frameworks can be composed of flexible motifs that are linked via strong bond and/or stiff motifs that are connected via weaker bonds.

Guest shape-responsive fitting of porous coordination polymer with shrinkable framework 査読有り

R Matsuda, R Kitaura, S Kitagawa, Y Kubota, TC Kobayashi, S Horike, M Takata

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 126 巻 ( 43 ) 頁： 14063 - 14070 2004年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：AMER CHEMICAL SOC

In situ synchrotron X-ray powder diffraction patterns of porous coordination polymers {[Cu-2-(pzdc)(2)(bpy)](.)G} have been measured (pzdc = pyrazine-2,3-dicarboxylate, bpy = 4,4'-bipyridine) (where G = H2O for CPL-2 superset of H2O, G = benzene for CPL-2 superset of benzene, and G = void for the apohost). The structures of apohost and CPL-2 superset of benzene were determined from Rietveld analysis. Adsorption of benzene in the channels induced a remarkable contraction in the crystal (b axis; 6.8%, volume; 4.9%), although the channels were occupied by the benzene molecules. This crystal transformation provides a new pore structure that is well suited for benzene molecules, and we denote it as a "shape-responsive fitting" transformation. This type of pore gives rise to a new guideline: frameworks can be composed of flexible motifs that are linked via strong bond and/or stiff motifs that are connected via weaker bonds.

DOI： 10.1021/ja046925m

Rational design and crystal structure determination of a 3-D metal-organic jungle-gym-like open framework 査読有り

Ryo Kitaura, Fumiyasu Iwahori, Ryotaro Matsuda, Susumu Kitagawa, Yoshiki Kubota, Masaki Takata, Tatsuo C. Kobayashi

Inorganic Chemistry 43 巻頁： 6522-6524 2004年10月

Rational design and crystal structure determination of a 3-D metal-organic jungle-gym-like open framework 査読有り

R Kitaura, F Iwahori, R Matsuda, S Kitagawa, Y Kubota, M Takata, TC Kobayashi

INORGANIC CHEMISTRY 43 巻 ( 21 ) 頁： 6522 - 6524 2004年10月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：AMER CHEMICAL SOC

A new three-dimensional (3-D) jungle-gym-like open metal-organic framework has been synthesized from a two-dimensional (2-D) layer compound using a heterogeneous pillar insertion reaction. Both the starting 2-D layer and the resulting 3-D open compounds have been characterized using X-ray crystallography.

DOI： 10.1021/ic049005d

Expanding and shrinking porous modulation based on pillared-layer coordination polymers showing selective guest adsorption 査読有り

Tapas Kumar Maji, Kazuhiro Uemura, Ho Chol Chang, Ryotaro Matsuda, Susumu Kitagawa

Angewandte Chemie - International Edition 43 巻頁： 3269-3272 2004年6月

Immobilization of a metallo Schiff base into a microporous coordination polymer 査読有り

Ryo Kitaura, Goro Onoyama, Hirotoshi Sakamoto, Ryotaro Matsuda, Sin Ichiro Noro, Susumu Kitagawa

Angewandte Chemie - International Edition 43 巻頁： 2684-2687 2004年5月

記述言語：英語掲載種別：研究論文（学術雑誌）

Wall decoration: Coordinatively unsaturated metal centers (CuII, CoII, and NiII) can be embedded in the pore wall of a microporous coordination polymer containing Schiff base type metalloligands [M(salphdc)]2- (H4salphdc = N,N′-o- phenylenebis(salicylideneimine-5,5′-dicarboxylic acid)). These coordination polymers possess large 1D channels with dimensions of approximately 14 × 14 ?2 (see structure).

Magnetism of a one-dimensional array of oxygen in a micro-porous metal-organic solid 査読有り

A. Matsuo, T. C. Kobayashi, M. Suzuki, K. Kindo, R. Kitaura, R. Matsuda, H. C. Chang, S. Kitagawa

Journal of Magnetism and Magnetic Materials 頁： 272-276 2004年5月

記述言語：英語掲載種別：研究論文（学術雑誌）

The magnetic properties of molecular oxygen adsorbed in the micro-porous metal-organic solids have been investigated. Adsorbed O2 molecules form a ladder structure in the nanochannels of CPL-1. The temperature dependence of susceptibility and the high-field magnetization process indicate the nonmagnetic ground state of the adsorbed O2 at low temperatures. ? 2003 Elsevier B.V. All rights reserved.

Magnetism of a one-dimensional array of oxygen in a micro-porous metal-organic solid 査読有り

A. Matsuo, T. C. Kobayashi, M. Suzuki, K. Kindo, R. Kitaura, R. Matsuda, H. -C. Chang, S. Kitagawa

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 272 巻頁： E643 - E645 2004年5月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCIENCE BV

The magnetic properties of molecular oxygen adsorbed in the micro-porous metal-organic solids have been investigated. Adsorbed O-2 molecules form a ladder structure in the nanochannels of CPL-1. The temperature dependence of susceptibility and the high-field magnetization process indicate the nonmagnetic ground state of the adsorbed O-2 at low temperatures. (C) 2003 Elsevier B. V. All rights reserved.

DOI： 10.1016/j.jmmm.2003.11.327

Expanding and shrinking porous modulation based on pillared-layer coordination polymers showing selective guest adsorption 査読有り

TK Maji, K Uemura, HC Chang, R Matsuda, S Kitagawa

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 43 巻 ( 25 ) 頁： 3269 - 3272 2004年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：WILEY-V C H VERLAG GMBH

Rationally designed and synthesized, two novel pillar-layered 3D microporous frameworks {[Cd(pzdc)(azpy)]?2H2O}n, (1, left) and {[Cd(pzdc)(bpee)]?1.5H2O}n, (2, right) have high thermal stability and highly selective adsorption properties. Removal of guest water molecules results in the expansion of 1 but the contraction of 2.

DOI： 10.1002/anie.200453923

Motion of methanol adsorbed in porous coordination polymer with paramagnetic metal ions 査読有り

S Horike, R Matsuda, R Kitaura, S Kitagawa, T Iijima, K Endo, Y Kubota, M Takata

CHEMICAL COMMUNICATIONS 10 巻 ( 19 ) 頁： 2152 - 2153 2004年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ROYAL SOC CHEMISTRY

Molecular motions of methanol adsorbed in 1D nanochannels of pillared-layer coordination polymer with paramagnetic metal ions have been studied by H-2 NMR together with X-ray crystallography.

DOI： 10.1039/b406883a

Immobilization of a metallo Schiff base into a microporous coordination polymer 査読有り

R Kitaura, G Onoyama, H Sakamoto, R Matsuda, S Noro, S Kitagawa

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 43 巻 ( 20 ) 頁： 2684 - 2687 2004年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：WILEY-V C H VERLAG GMBH

DOI： 10.1002/anie.200352596