A03 Sayaka Uchida

Sayaka Uchida

Participating A03


School of Arts and Sciences, The University of Tokyo


Associate Professor



Research Project

Directional Ion Conduction by Confined Single-Chain Polymer in Porous Inorganic Ionic Crystals


Introducing directionality and anisotropy in inorganic solid state materials has been a long-standing issue in inorganic chemistry. Polyoxometalates (POM) are nano-sized anionic metal-oxygen clusters with low surface electron density, which are suitable for conducting cations. In this work, a series of all-inorganic porous ionic crystals will be synthesized with POM and appropriate counter cations, and single-chain polymers with acidic or basic functional groups will be confined into the pores. Realizing efficient cation (proton) conduction along the pores via segmental motion or conformation of polymers is the main target of this work. The conformation of single-chain polymers will be investigated by X-ray or neutron diffraction techniques. The helicity of polymers will be controlled by chirality multiplication and efficient chirality transfer with chiral amino acids.

Research Areas

Inorganic Chemistry, Coordination Chemistry, Solid State Materials Chemistry


Polyoxometalates, Ionic Crystals, Porous Materials, Ion Conduction


[6] Effect of Ammonium Ion toward Proton Conduction in Porous Ionic Crystals Based on Keggin-type Silicododecatungstate,
Satoru Miyazawa; Reina Hosono; Ryota Osuga; Junko Nomura Kondo; Sayaka Uchida, Acta Cryst. C (special issue on polyoxometalates), 74, , 2018
DOI: 10.1107/S2053229618008227.
[5] Rapid Uptake / Release of Cs+ in Isostructural Redox-Active Porous Ionic Crystals with Large Molecular Size and Easily Reducible Dawson-Type Polyoxometalates as Building Blocks,
Shota Hitose; Sayaka Uchida, Inorg. Chem., 57, 4833 - 4836, 2018
DOI: 10.1021/acs.inorgchem.8b00801.
[4] Porous Ionic Crystals Based on Polyoxometalates,
Sayaka Uchida, Structure and Bonding, 176, 65 - 87, 2018
DOI: 10.1007/430_2017_3.
[3] Highly pH-Dependent Facile-Preparation of Amorphous High Surface Area Aluminum Hydroxide-Bicarbonates with [Al13O4(OH)24(H2O)12]7+,
Yuki Kinoshita; Ryota Osuga; Junko N. Kondo; Yoshiyuki Ogasawara; Sayaka Uchida, Chem. Lett., 47, 668 - 670, 2018
DOI: 10.1246/cl.180103.


[2] High Proton Conduction in Crystalline Composites Based on Preyssler-type Polyoxometalates and Polymers under Non-humidified or Humidified Conditions,
Kazuma Niinomi; Satoru Miyazawa; Mitsuhiro Hibino; Noritaka Mizuno; Sayaka Uchida, Inorg. Chem., 56, 24, 15187 - 15193, 2017
DOI: 10.1021/acs.inorgchem.7b02524.
[1] Proton conduction in alkali metal ion-exchanged porous ionic crystals,
Sayaka Uchida; Reina Hosono; Ryo Eguchi; Ryosuke Kawahara; Ryota Osuga; Junko Nomura Kondo; Mitsuhiro Hibino; Noritaka Mizuno, Phys. Chem. Chem. Phys., 19, 29077 - 29083, 2017
DOI: 10.1039/C7CP04619G.