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  • 1. Anderlund, Magnus F.
    et al.
    Zheng, J.
    Ghiladi, Marten
    Kritikos, Mikael
    Riviere, Eric
    Sun, Licheng
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Girerd, Jean-Jacques
    Akermark, Bjoern
    A new, dinuclear high spin manganese(III) complex with bridging phenoxy and methoxy groups. Structure and magnetic properties2006In: Inorganic Chemistry Communications, ISSN 1387-7003, E-ISSN 1879-0259, Vol. 9, no 12, p. 1195-1198Article in journal (Refereed)
    Abstract [en]

    A new mu-phenoxy-mu-metoxy di-manganese(III) complex with the trisphenolic ligand, 2,6-bis[((2-hydroxybenzyl)(2-pyridylmethyl)amino)methyl]-4-methylphenol, was isolated as a perchlorate salt. The X-ray structure shows that the two manganese(III) ions are in a distorted octrahedral enviroment with approximately perpendicular Jahn-Teller axes. Investigation of the molar magnetic susceptibility reveals a ferromagnetic coupling between the two high-spin manganese(III) ions. Fitting of the data led to g = 2 and J = 12.5 cm(-1).

  • 2. Chen, Y. G.
    et al.
    Wang, M.
    Jin, K.
    Wang, D. P.
    Na, Y.
    Sun, Licheng C.
    Synthesis and property of a chiral salen Mn(III) complex covalently linked to an Ru(II) tris(bipyridyl) photosensitizer2005In: Inorganic Chemistry Communications, ISSN 1387-7003, E-ISSN 1879-0259, Vol. 8, no 7, p. 606-609Article in journal (Refereed)
    Abstract [en]

    A catalyst-photo sensitizer binuclear Mn(III)Ru(II) complex was prepared, in which the catalyst moiety of the Mn(III) unit with a chiral pyrrolidine salen ligand was covalently linked to a photosensitizer of the Ru(II) tris(bipyridyl) fragment. The electrochemical and photophysical properties of the Mn(III)Ru(II) complex were studied.

  • 3. Hu, Minggang
    et al.
    Wang, Mei
    Zhang, Peili
    Wang, Lin
    Zhu, Fangjun
    Sun, Licheng
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
    Preparation and structure of an enantiomeric water-bridged dinuclear indium complex containing two homochiral N atoms and its performance as an initiator in polymerization of rac-lactide2010In: Inorganic Chemistry Communications, ISSN 1387-7003, E-ISSN 1879-0259, Vol. 13, no 8, p. 968-971Article in journal (Refereed)
    Abstract [en]

    A novel dinuclear indium complex (1) containing a sole water bridge was prepared from the reaction of InCl3 with an unsymmetric N2O2-ligand and the molecular structure of the complex 1 was determined. The X-ray crystallography data show that the dinuclear complex possesses two homochiral N atoms, namely, N(R)N(R) and N(S)N(S) enantiomers. Complex 1 was used as initiator for ring-opening polymerization of rac-lactide, giving heterotactic-rich polylactide (P-r = 0.63-0.69) with narrow polydispersities (1.13-1.31).

  • 4. Jiang, S.
    et al.
    Liu, J. H.
    Sun, Licheng C.
    A furan-containing diiron azadithiolate hexacarbonyl complex with unusual lower catalytic proton reduction potential2006In: Inorganic Chemistry Communications, ISSN 1387-7003, E-ISSN 1879-0259, Vol. 9, no 3, p. 290-292Article in journal (Refereed)
    Abstract [en]

    A new biomimetic model of the active site of Fe-only hydrogenase [{(mu-SCH2)(2)N(2-C4H3O)} Fe-2(CO)(6)] (6) was synthesized and characterized by IR, H-1, C-13 NMR spectroscopy. The butterfly based core structure was also confirmed by X-ray diffraction. The electrochemistry data indicated that the reductive potential at -1.13 V versus Fc/Fc(+) by HClO4 is the lowest of that reported.

  • 5. Viotti, Olle
    et al.
    Fischer, Andreas
    KTH, School of Chemical Science and Engineering (CHE), Chemistry, Inorganic Chemistry.
    Seisenbaeva, Gulaim A.
    Kessler, Vadim G.
    Straightforward synthesis and structural characterization of the first alkoxy-zircono-silsesquioxanes - Potential models for zirconia-silica epoxidation catalysts Molecular hybrid materials mimicking solution exchange in MOFs2010In: Inorganic Chemistry Communications, ISSN 1387-7003, E-ISSN 1879-0259, Vol. 13, no 6, p. 774-777Article in journal (Refereed)
    Abstract [en]

    The first representatives of alkoxy-zircono-silsesquioxane compounds, dinuclear [Cy7Si7O12]Zr(ROH)(mu-OR)(2)Zr(ROH)[O12Si7Cy7], where R = Pr-n, Bu-n, Bu-t: Cy = c-C6H11, and [Cy*7Si7O12]Zr(mu-ROH)(mu-OR)(2)Zr [O12Si7Cy*(7)], R = Bu-t; Cy* = c-C5H9, have been prepared with quantitative yield by interaction of the corresponding zirconium alkoxides with the cycloalkyl-substituted cage silsesquioxanes in hexane. The Xray single crystal study of the n-butoxide derivative revealed that zirconium atoms are hexacoordinated with the 3 oxygen atoms of the cage ligand, 2 from the bridging alkoxide groups and one from the solvating alcohol molecule in the coordination sphere. The molecule is additionally supported by a hydrogen bond between the solvating alcohol and an oxygen atom belonging to the cage ligand coordinated by the other zirconium atom. The structures of produced silsesquioxanes display behavior typical for metal-organic frameworks as they crystallize initially as hexane clathrates, but lose the solvent on storage in inert atmosphere. This results in formation of empty channels situated along the c-axis. (C) 2010 Elsevier B.V. All rights reserved.

  • 6. Wolpher, H.
    et al.
    Borgstrom, M.
    Hammarstrom, L.
    Bergquist, J.
    Sundstrom, V.
    Stenbjorn, S.
    Sun, Licheng C.
    Akermark, B.
    Synthesis and properties of an iron hydrogenase active site model linked to a ruthenium tris-bipyridine photosensitizer2003In: Inorganic Chemistry Communications, ISSN 1387-7003, E-ISSN 1879-0259, Vol. 6, no 8, p. 989-991Article in journal (Refereed)
    Abstract [en]

    A dinuclear iron complex, related to the active site of Fe hydrogenases, has been covalently linked to a redox active ruthenium tris-bipyridine type photosensitizer. Photophysics and electrochemistry of this system are studied in solution. IR spectra of this complex together with its precursor, the dinuclear iron complex, were also shown.

  • 7. Wolpher, H.
    et al.
    Johansson, O.
    Abrahamsson, M.
    Kritikos, M.
    Sun, Licheng C.
    Akermark, B.
    A tridentate ligand for preparation of bisterpyridine-like ruthenium(II) complexes with an increased excited state lifetime2004In: Inorganic Chemistry Communications, ISSN 1387-7003, E-ISSN 1879-0259, Vol. 7, no 3, p. 337-340Article in journal (Refereed)
    Abstract [en]

    A new tridentate polypyridine ligand, 6-(2-picolyl)-2,2'-bipyridine, as well as its homoleptic Ru(II) complex has been prepared. Photophysical studies show a prolonged lifetime of the excited state compared to [Ru(tpy)2](2+), where tpy is 2,2':6',2-terpyridine.

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