Masafumi Unno

Recent and Selected Publication

N. Oguri, Y. Egawa, N. Takeda, and M. Unno, Janus-Cube Octasilsesquioxane: Facile Synthesis and Structure ElucidationAAngew. Chem. Int. Ed. In press (2016). DOI: 10.1002/anie.201602413

S. Murakami, Y. Egawa, C. Kuramochi, N. Takeda, and M. Unno, Cyclic Silanols with Long Alkyl Chains, Chem. Lett., 45, in press (2016). DOI:10.1246/cl.151143

N. Oguri, N. Takeda, and M. Unno, Facile Synthesis of Cyclic Fluorosiloxanes
, Chem. Lett., 44, 1506–1508 (2015). DOI: 10.1246/cl.150692

H. Endo, and N. Takeda, M. Takanashi, T. Imai, and M. Unno, Refractive Indices of Silsesquioxanes with Various Structures, Silicon, 7, 127–32 (2015). DOI 10.1007/s12633-014-9239-6.

M. Unno, H. Endo, and N. Takeda, Synthesis and Structures of Extended Cyclic Siloxanes, Heteroatom Chem. 25, 525–532 (2014). DOI:10.1002/hc.21198.

N. Takeda, T. Tagawa, and M. Unno, Synthesis, Reactivities, and Coordination Chemistry of Tris(2-isopropoxyphenyl)phosphine, Heteroatom Chem. 25, 628–635 (2014). DOI:10.1002/hc.21174.

K. Kakiage, Y. Aoyama, T. Yano, T. Otsuka, T. Kyomen, M. Unno, and M. Hanaya, An achievement of over 12 percent efficiency in an organic dye-sensitized solar cell, Chem. Commun., 50, 6379–6381 (2014). DOI:10.1039/c4cc02192d. 6.834

H. Endo, N. Takeda, and M. Unno, Synthesis and Properties of Phenylsilsesquioxanes with Ladder and Double-Decker Structures, Organometallics, 33, 4148-4151 (2014). DOI:10.1021/om500010y. 4.126

R. Yanagisawa, H. Endo, M. Unno, H. Morimoto, S. Tobishima, Effects of organic silicon compounds as additives on charge-discharge cycling efficiencies of lithium in nonaqueous electrolytes for rechargeable lithium cells, J. Power Sources, 266, 232–240 (2014). DOI:10.1016/j.jpowsour.2014.05.017. 6.217

S. Kondo, Y. Nakadai, and M. Unno, Pyrophosphate selective recognition by a Zn2+ complex of a 2,20-binaphthalene derivative bearing di(2-pyridylmethyl)aminomethyl groups in aqueous solution, RSC Adv., 4, 27140–27145 (2014). DOI: 10.1039/c4ra01941e. 3.84

K. Kakiage, Y. Aoyama, M. Yamamura, T. Yano, M. Unno, T. Kyomen, and M. Hanaya, A Novel Alkoxysilyl Azobenzene Dye Photosensitizer with Alkylamino Group for Dye-Sensitized Solar Cells, Silicon, 6, 123–127 (2014). DOI:10.1007/s12633-013-9174-y.

M. Yamamura, S. Kondo, and M. Unno, Ion Pair Recognition of Ditopic Receptor Bearing Silanol Groups as Anion Recognition Sites and a 2,2'-Bipyridine Moiety as a Metal-coordination Site, Tetrahedron Lett., 55, 646–649 (2014). DOI: 10.1016/j.tetlet.2013.11.096.

S. Kondo, N. Watanabe, F. Takahashi, N. Takeda, and M. Unno
, Synthesis and photophysical properties of 2,2f-binaphthalene-based receptor bearing trimethylsilyl groups to improve the solubility, 
J. Incl. Phenom. Macrocycl. Chem., 75, 31-38 (2013). DOI:10.1007/s10847-012-0142-8.

M. Unno, T. Matsumoto, H. Matsumoto, Nonacyclic Ladder Silsesquioxanes and Spectral Features of Ladder Polysilsesquioxanes, Int. J. Polym. Sci., ID723892 (2012).

S. Kondo, S. Nakajima, and M. Unno, Ratiometric Fluorescence Detection of Anions by an Amide-Based Receptor Bearing Pyrenyl Groups, Bull. Chem. Soc. Jpn., 85, 698-700 (2012).

V. Ervithayasuporn, T. Tomeechai, N. Takeda, M. Unno, A. Chaiyanurakkul, R. Hamkool, and T. Osotchan, Synthesis and Characterization of Octakis(3-propyl ethanethioate)octasilsesquioxane, Organometallics, 30, 4475–4478 (2011).

K. Kakiage, M. Yamamura, E. Ido, T. Kyomen, M. Unno, and M. Hanaya, Reactivity of Alkoxysilyl Compounds: Chemical Surface Modification of Nano-porous Alumina Membrane Using Alkoxysilylazobenzenes, Appl. Organomet. Chem., 25, 98–104 (2011).

R. Tanaka, S. Kowase, and M. Unno, Chiral Cyclotrisiloxanes, Dalton Trans., 39, 9235–9237 (2010).


K. Kakiage, M. Yamamura, E. Fujimura, T. Kyomen, M. Unno and M. Hanaya, High Performance of Si–O–Ti Bonds for Anchoring Sensitizing Dyes on TiO2 Electrodes in Dye-sensitized Solar Cells Evidenced by Using Alkoxysilylazobenzenes, Chem. Lett., 39, 260–262 (2010).


N. Takeda, D. Watanabe, T. Nakamura, and M. Unno, Synthesis and Complexation of New Tripodal Tetradentate Ligand, Silyl Ligand Tethered with Three Thioether Moieties, Organometallics, 29, 2839-2841 (2010).


H. Liu, S. Kondo, N. Takeda, and M. Unno, An Efficient Approach to Monophenyl-Functionalized Octasilsesquioxanes, Eur. J. Inorg. Chem., 1317-1319 (2009).

H. Liu, S. Kondo, N. Takeda, and M. Unno, Synthesis of Octacarboxy Spherosilicate, J. Am. Chem. Soc., 130, 10074-10075 (2008).

K. Kakiage, Y. Nakada, T. Kogure, M. Yamamura, T. Kyomen, M. Unno, and M. Hanaya, Applicability of Silanol to Sensitizing Dye for Dye-sensitized Solar Cell, Silicon Chem., 3, 303-305 (2008).

M. Endo, T. Sakurai, S. Ojima, T. Katayama, M. Unno, H. Matsumoto, S. Kowase, H. Sano, M. Kosugi, and K. Fugami, Novel Pd-Catalyzed Atom-Efficient Cross-Coupling Reaction by Means of Hexaarylcyclotrisiloxane, SynLett, 5, 749-752 (2007).

S. Kondo, T. Harada, R. Tanaka, and M. Unno, Anion Recognition by a Silanediol-Based Receptor, Org. Lett., 8, 4621–4624 (2006).

M. Hirotsu, S. Taruno, T. Yoshimura, K. Ueno, M. Unno, and H. Matsumoto, Synthesis and Structures of the First Titanium(IV) Complexes with Cyclic Tetrasiloxide Ligands: Incomplete and Complete Cage Titanosiloxanes, Chem. Lett., 34, 1542–1543 (2005).

M. Unno, Y. Kawaguchi, Y. Kishimoto, and H. Matsumoto, Stereoisomers of 1,3,5,7-Tetrahydroxy-1,3,5,7-tetaisopropylcyclotetrasiloxane: Synthesis and Structures in the Crystal, J. Am. Chem. Soc., 127, 2256–2263 (2005).

M. Unno, T. Matsumoto, K. Mochizuki, K. Higuchi, M. Goto, and H. Matsumoto, Structure and Oxidation of Octakis(tert-butyldimethylsilyl)octasilacubane, J. Organomet. Chem., 685, 156–161 (2003).

K. Yamada, M. Unno, K. Kobayashi, H. Oku, H. Yamamura, S. Araki, H. Matsumoto, R. Katakai, and M. Kawai, Stereochemistry of Protected Ornithine Side Chains of Gramicidin S Derivatives: X-ray Crystal Structure of the Bis-Boc-tetra-N-methyl Derivatives of Gramicidin S, J. Am. Chem. Soc., 124, 12684–12688 (2002).

M. Unno, A. Suto, and H. Matsumoto, Pentacyclic Laddersiloxane, J. Am. Chem. Soc., 124, 1574–1575 (2002).

M. Unno, Y. Kawai, and H. Matsumoto, Synthesis and Crystal Structures of 2,4,6-Tri-tert-butylphenyltrichlorogermane and 2,4,6-Tri-tert-butylphenylgermane, Heteroatom Chem., 12, 238–243 (2001).

M. Unno, K. Negishi, and H. Matsumoto, Extended Silapericyclynes, Chem. Lett., 340–341 (2001).

M. Unno, K. Higuchi, K. Furuya, H. Shioyama, S. Kyushin, M. Goto, and H. Matsumoto, Synthesis, Structure, and Reactions of Octakis(1,1,2-trimethylpropyl)octagermacubane, Bull. Chem. Soc. Jpn., 73, 2093–2097 (2000).

H. Horiuchi, Y. Nakano, T. Matsumoto, M. Unno, H. Matsumoto, and H. Hiratsuka, Electronic Structure and Photochemical Reaction Intermediates of Octakis(1,1,2-trimethylpropyl)octasilacubane, Chem. Phys. Lett., 322, 33–40 (2000).

M. Unno, K. Takada, and H. Matsumoto, Formation of Supramolecule by Assembling of Two Different Silanols, Chem. Lett., 2000, 242–243.

M. Unno, Y. Kawai, H. Shioyama, and H. Matsumoto, Syntheses, Structures, and Properties of Tricyclo[5.1.1.13,5]tetrasilachalcogenanes (Thex2Si2E2)2E2 (E = S, Se) and Tricyclo[5.1.1.13,5]tetragermachalcogenanes (Thex2Ge2E2)2E2 (E = S, Se), Organometallics, 16, 4428–4434 (1997).

M. Unno, M. Saito, and H. Matsumoto, Synthesis, Structure, and Properties of Novel Aminodisilanes Bearing Bulky Substituents: 1,2-bis(1,1,2-trimethylpropyl)-1,1,2,2-tetrakis(diethylamino)disilane and 1,2-di-(tert-butyl)1,1,2,2-tetrakis(diethylamino)disilane, J. Organomet. Chem., 499, 221–228 (1995).

B. Imperiali, K. L. Shannon, M. Unno, and K. W. Rickert, A Mechanistic Proposal for Asparagine-Linked Glycosylation, J. Am. Chem. Soc., 114, 7944–7945 (1992).

L. T. Scott and M. Unno, Novel Heterocycles Comprising Alternating Phosphorus Atoms and Alkyne Units, J. Am. Chem. Soc., 112, 7823–7825 (1990).

R. Okazaki, M. Unno, G. Yamamoto, and N. Inamoto, A Conformational Study on Highly Crowded 1,3,5-Tris[bis(trimethylsilyl)methyl]benzene Derivatives. Chem. Lett. 493–496 (1989).

R. Okazaki, M. Unno, and N. Inamoto, 2,4,6-Tris[bis(Trimethylsilyl)methyl]phenyl, a New Sterically Demanding Group for Kinetic Stabilization of Unstable Compounds, Chem. Lett., 2293–2294 (1987).

Educational Background

Koyo-Gakuin High School (Hyogo Prefecture, Private School) 1976-1979

The University of Tokyo, 1979-1988

Doctor of Science (Chemistry)  The University of Tokyo, Tokyo , Japan, 1988

Experience

Postdoctoral Fellow, University of Nevada Reno (Prof. L.T. Scott) 1988.10-1990.10

Postdoctoral Fellow, California Institute of Technology (Prof. B. Imperiali) 1990.10-1992.1

Frontier Researcher, Photodynamics Research Center, RIKEN (Prof. M. Kira) 1992.5-1993.1

Assitant Professor: Department of Applied Chemistry, Faculty of Engineering, Gunma University, 1993.1-2002.3

Associate Professor: Department of Applied Chemistry, Faculty of Engineering, Gunma University, 2002.4-2005.3 
     
Professor: Department of Applied Chemistry, Faculty of Engineering,  Gunma University, 2005.4-


Professor: Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, 2013.4-

Director, International Education and Research Center for Silicon Science,  Graduate School of Science and Engineering, Gunma University, 2009.8-2015.3