Masafumi Unno

Recent Publication

 Y. Liu, N. Takeda, A. Ouali, M. Unno, Synthesis, Characterization, and Functionalization of Tetrafunctional Double-Decker Siloxanes, Inorg. Chem., 58, 4093–4098 (2019). DOI: 10.1021/acs.inorgchem.9b00416

T. Tanaka, Y. Hasegawa, T. Kawamori, R. Kunthom, N. Takeda, M. Unno, Synthesis of Double-Decker Silsesquioxanes from Substituted Difluorosilane, Organometallics, 38, 743-747 (2019). DOI: 10.1021/acs.organomet.8b00896

S. Kondo, Y. Nakadai, M. Unno, Recognition of dicarboxylates in aqueous acetonitrile by a dinuclear zinc(II) complex of 2,2'-binaphthalene-based receptor, Supramolecular Chem., 31, 9–18 (2019). DOI: 10.1080/10610278.2018.1522445

T. Uchida, Y. Egawa, T. Adachi, N. Oguri, M. Kobayashi, T. Kudo, N. Takeda, M. Unno R. Tanaka, Synthesis, Structures, and Thermal Properties of Symmetric and Janus “Lantern Cage” Siloxanes, Chem. Eur. J., 25, 1683 –1686 (2019). https://doi.org/10.1002/chem.201805200

H. Endo, N. Takeda, and M. Unno, Single-step synthesis of disiloxanetetraols, J. Sol-Gel Sci. Technol., 89, 37–44 (2019). DOI: 10.1007/s10971-018-4635-9

Y. Egawa, C. Fukumoto, K. Mikami, N. Takeda, M. Unno, Synthesis and Characterizations of the Germathioacid Chloride Coordinated by an N-Heterocyclic Carbene Inorganics, 6, 76 (2018). https://doi.org/10.3390/inorganics6030076

H. Endo, N. Takeda, and M. Unno, Stereoisomerization of Cyclic Silanols, Chem. Asian J., 12, 1224–1233 (2017). DOI: 10.1002/asia.201700125

N. Oguri, Y. Egawa, Y. Kawakami, C. Kobuna, N. Takeda, and M. Unno, Unusual Reactions of Cyclic Fluorosiloxanes, ChemistrySelect, 2, 2300–2304 (2017). DOI: 10.1002/slct.201700306

Y. Egawa, S. Murakami, N. Takeda, and M. Unno, Synthesis of Hydrosilyl-substituted Cyclic Siloxane: New Building Block for Materials, Chem. Lett., 45, 738–739 (2016). DOI: 10.1246/cl.160272

N. Oguri, Y. Egawa, N. Takeda, and M. Unno, Janus-Cube Octasilsesquioxane: Facile Synthesis and Structure Elucidation, Angew. Chem. Int. Ed. 55, 9336-9339 (2016). DOI: 10.1002/anie.201602413

N. Takeda, Y. Tanaka, R. Oma, F. Sakakibara, M. Unno, Activation of C–S Bond by Group 10 Metal Complexes: Reaction of Phosphine Ligand Tethered with Three tert-Butylthiophenyl Groups with Group 10 Metal Compounds, Bull. Chem. Soc. Jpn.  89, 922-930 (2016).

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.

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. 

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. 

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.

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’-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.

S. Kondo, N. Okada, R. Tanaka, M. Yamamura, and M. Unno, Anion recognition by 1,3-disiloxane-1,1,3,3-tetraols in organic solvents, Tetrahedron Lett., 50, 2754-2757 (2009).

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).

H. Liu, S. Kondo, R. Tanaka, H. Oku, and M. Unno, A spectroscopic investigation of incompletely condensed polyhedral oligomeric silsesquioxanes (POSS-mono-ol, POSS-diol and POSS-triol): Hydrogen-bonded interaction and host-guest complex, J. Organomet. Chem., 693 1301-1308 (2008).

S. Kondo, A. Fukuda, T. Yamamura, R. Tanaka, and M. Unno, Anion Recognition by a Disiloxane-1,3-diol in Organic Solvents, Tetrahedron. Lett., 48, 7946-7949 (2007).


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) 1990.10-1991.11

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  Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, 2005.4-

Also Director, International Education and Research Center for Silicon Science,  Graduate School of Engineering,
Gunma University, 2008.3-2015.3