Masaaki Ohba

The ins and outs of spin: Using the microporous coordination polymer {Fe(pz)[Pt(CN)(4)]} (1, pz=pyrazine), incorporating spin-crossover subunits, two-directional magnetic chemo-switching is achieved at room temperature. In situ magnetic measurements following guest vapor injection show that most guest molecules transform 1 from the low-spin (LS) state to the high-spin (HS) state, whereas CS(2) uniquely causes the reverse HS-to-LS transition.

TGF-beta 1 controls the expression of numerous genes, including early response and cellular matrix genes. However, the signal-transducing mechanism underlying this regulation of gene expression is not fully understood. In this study, we investigated whether redox regulation plays a role in the TGF-beta 1 signal transduction in the mouse osteoblastic cell line (MC3T3-E1). The overall intracellular oxidized state of the cells, when measured using 2',7'-dichlorofluorescin diacetate by laser-scannin

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA New Bimetallic Ferromagnet, [Ni(en)2]3[Fe(CN)6]2.cntdot.2H2O, with a Rare Rope-Ladder Chain StructureMasaaki Ohba, Naomi Maruono, Hisashi Okawa, Toshiaki Enoki, and Jean-Marc LatourCite this: J. Am. Chem. Soc. 1994, 116, 25, 11566–11567Publication Date (Print):December 1, 1994Publication History Published online1 May 2002Published inissue 1 December 1994https://pubs.acs.org/doi/10.1021/ja00104a046https://doi.org/10.1021/ja00104a046research-articleACS

Cyanide-bridged bimetallic assemblies [Ni(pn)2]2[Fe(CN)6]X·catnH2O (X = ClO4- and n = 2 (1); X = BF4- and n = 2 (2); X = PF6- and n = 2 (3)) and [Ni(1,1-dmen)2]2[Fe(CN)6]X·nH2O (X = ClO4- and n = 2 (4); X = BF4- and n = 3 (5); X = PF6- and n = 2 (6); X = CF3SO3- and n = 2 (7); X = BzO- and n = 6 (8); X = I- and n = 4 (9); X = N3- and n = 4 (10); X = NCS- and n = 1 (11); X = NO3- and n = 4 (12)) have been prepared (pn = 1,2-propanediamine, 1,1-dmen = 1,1-dimethylethylenediamine). 7 crystallizes i

Mixing with the guests: Exposure of the porous spin-crossover framework {Fe(pz)[PtII(CN)4]} to X2 (pz=pyrazine; X2=Cl2, Br2, and I2) leads to incorporation of the halides in the coordinatively unsaturated [PtII(CN)4]2− moieties through oxidative addition, thus affording the mixed-valence series {Fe(pz)[PtII/IV(CN)4(X)]}, which features quite distinct cooperative spin-transition properties.

The first modified analogue of the A^II₃ [B^III (CN)₆ ]₂ ⋅x H₂ O type of Prussian-Blue, the title compound, has a three-dimensional network structure extended by Cr^III -CN-Mn^II linkages, which is based on a defective cubane unit comprising three Cr and four Mn ions (see structure), and shows ferrimagnetic ordering below 69 K.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOxalate-bridged dinuclear chromium(III)-M(II) (M = copper, nickel, cobalt, iron, manganese) complexes: synthesis, structure, and magnetismMasaaki Ohba, Hiroko Tamaki, Naohide Matsumoto, and Hisashi OkawaCite this: Inorg. Chem. 1993, 32, 23, 5385–5390Publication Date (Print):November 1, 1993Publication History Published online1 May 2002Published inissue 1 November 1993https://pubs.acs.org/doi/10.1021/ic00075a069https://doi.org/10.1021/ic00075a069researc

Three bimetallic assemblies, PPh4[Ni(pn)2][M(CN)6]·H2O (M = Fe (1), Cr (2), Co (3); pn = rac-1,2-diaminopropane), have been prepared and structurally and magnetically characterized. Assembly 2 crystallizes in the monoclinic system of the space group P2/c (No. 13) with a = 12.927(2) Å, b = 8.454(2) Å, c = 17.564(2) Å, β = 100.15(1)°, V = 1889.5(6) Å3, and Z = 2, and 3 crystallizes in the same space group with a = 12.971(1) Å, b = 8.437(1) Å, c = 17.118(1) Å, β = 99.84(1)°, V = 1845.7(3) Å3, and Z

Abstract Gasteinschluss und Spin : Das mikroporöse Koordinationspolymer {Fe(pz)[Pt(CN) 4 ]} ( 1 , pz=Pyrazin) enthält Spin‐Crossover‐Untereinheiten und kann als chemischer Schalter verwendet werden, der bei Raumtemperatur zwischen zwei magnetischen Zuständen wechselt. Magnetische Messungen unter Bedampfung belegen, dass die Einlagerung der meisten Gastspezies 1 aus dem Low‐Spin(LS)‐Zustand in den High‐Spin(HS)‐Zustand überführt; allein CS 2 bewirkt den umgekehrten Übergang von HS nach LS. magnif

Effects of pressure on the structures and magnetic properties of three types of 3-D cyanide-bridged bimetallic coordination polymer magnets, MnIICrIII ferrimagnet [Mn(en)]3[Cr(CN)6]2.4H2O (1; en = ethylenediamine), NiIICrIII ferromagnet [Ni(dipn)]3[Cr(CN)6]2.3H2O (2; dipn = N,N-di(3-aminopropyl)amine), and NiIIFeIII ferromagnet [Ni(dipn)]2[Ni(dipn)(H2O)][Fe(CN)6]2.11H2O (3), were systematically examined under hydrostatic pressure up to 19.8 GPa using a piston-cylinder-type pressure cell and a di

M. Ohba, H. Ōkawa, T. Ito and A. Ohto, J. Chem. Soc., Chem. Commun., 1995, 1545 DOI: 10.1039/C39950001545