Research

Cyanido-bridged Coordination Polymers

配位結合により組みあがる二次元配位高分子は、構造異方性をもつ新しい二次元材料です。特に、構造柔軟性や熱応答性を理解することで、巨大熱膨張率、ゼロ熱膨張率といった特異な構造特性をもつ固体材料を合成しています。

Two-dimensional (2D) coordination polymers (CPs) constructed via coordination bonds between metal ions and ligands are new type of 2D-materials including structural anisotropy. To explore characteristic structural properties based on the anisotropy, we synthesize new cyanido-bridged 2D-CPs which exhibit colossal, positive, zero, negative and anisotropic thermal expansion behavior. 

四配位金属中心構造には、主に、平面型とテトラヘドラル型の2種類が存在します。これに着目し、特に四配位鉄二価イオンを用いて、シンプルな組成でありながらも新規の三次元構造体を創出しています。 

Four-coordinate metal center has two-types of geometries: square planar and tetrahedral. Based on this, we synthesize new three-dimensional frameworks with simple compositions, especially incorporating four-coordinate iron(II) ions. 

15) Chem. Commun. 2024, 60, 6512-6515 <Giant anisotropic area thermal expansion of (TEA)[Cu2(CN)3]>
14) Chem. Mater. 2024, 36, 5446-5455 <Mechanical properties of  [Mn(salen)]2[M(CN)4] (M = Pt, PtI2)>
13) Inorg. Chem. 2023, 62, 18707-18713.  <Synthesis of Janus-honeycomb-layers, [Cu(L1)(L2)Cu(CN)3]>
12) Inorg. Chem. 2022, 61, 21123-21130. <Meta analysis of thermal expansion of a series of [M(salen)]2[M'(CN)4]>
11) CrystEngComm. 2022, 24, 5880-5884. <Zero area thermal expansion of (PPh4)[Cu2(CN)3]>
10) Chem. Eur. J. 2021, 27, 18135-18140. <Crystal morphology effects on flexibility of [Mn(salen)]2[ReN(CN)4] >
9) Chem. Lett. 2021, 50, 1577-1580. <Negative area thermal expansion of Janus-type layers of [Cd(H2O)(EtOH)][ReN(CN)4(H2O)]>
8) Inorg. Chem. 2021, 60, 6140-6146. <Flexible layer structure in excited states of [Cd(3ppy)(H2O)][ReN(CN)4(3ppy)]>
7) ChemNanoMat. 2021, 7, 534-538. <Negative area thermal expansion of [Fe(salen)]2[M(CN)4] (M = Pt, MnN)>

6) Dalton Trans. 2021, 50, 1990-1994. <Electron-lattice coupling of FePd(CN)4>

5) Angew. Chem. Int. Ed. 2020, 59, 19254-19259. <Anisotropic thermal expansion of FePd(CN)4>
4) Inorg. Chem. 2019, 58, 12739-12747. <Colossal interlayer thermal expansion of Mn(H2O)2Pd(CN)4·xH2O, Mn(H2O)(MeOH)Pd(CN)4, Mn(MeOH)2Pd(CN)4>
3) Dalton Trans. 2019, 48, 7198-7202.  <Chemical modification of layers of [Mn(salen)]2[Pt(I2)x(CN)4]>
2) Inorg. Chem. 2018, 57, 11588-11598. <Zero, positive and negative area thermal expansions of [Mn(salen)]2[M(CN)4] (M = Pt, PtI2, MnN)>
1) Inorg. Chem. 2017, 56, 6225-6233. <Zero area thermal expansion of [Mn(salen)]2[MnN(CN)4(MeOH/MeCN)]>

Organic-Inorganic Hybrids

カチオンとアニオンからなるイオン性物質の中には、低温での融解や構造相転移を示す動的な化合物があります。様々な集積構造体を構築できる金属錯体アニオンとイオン液体系カチオンなどを組み合わせることで、固体から液体を跨ぐ独特のイオン性材料を開発しています。

Ionic crystals constructed by cations and anions sometimes undergo dynamic behavior such as melting at low temperature and structural transitions. We synthesize unique ionic material that straddles phases of solid and liquid by combining metal complex anions and ionic liquid cations. 

5) J. Am. Chem. Soc. 2024, 146, 1476-1483. <A ferroelectric proton conductor K2MnN(CN)4.H2O>

4) Angew. Chem. Int. Ed. 2023, 62, e202306853 <A transformative luminescent hybrid (PyC3)[ReN(CN)4]>

3) Inorg. Chem. 2022, 61, 15638-15644. <A polar proton conductor (NEt4)2[MnN(CN)4]> 

2) Chem. Commun, 2020, 56, 7957-7960. <Melting cluster of (EmIm)2[ReN(CN)4]>

1) Chem. Eur. J. 2019, 25, 7521-7525. <Melting one-dimensional chain of (EmIm)2[MnN(CN)4]>

Metal complex lipids

脂質膜や細胞膜といった流動的で複雑な環境下で、相状態を制御することができる金属錯体プローブを開発しています。

We investigate metal complex lipids that can control lipid phases of lipids in fluid and complicated environments of lipid membranes and cell membranes.

4) Angew. Chem. Int. Ed. 2021, 60, 13603-13608. <Fluid-Fluid separation in phospholipid membrane>

3) Angew. Chem. Int. Ed. 2020, 59, 17931-17937. <Artificial domain formation in cell membrane>

2) Chem. Commun. 2017, 53, 13249-13252. <Morphology control of supramolecular lipid assemblies>

1) Dalton Trans. 2017, 46, 3749-3754. <Redox activity of metal complex lipids>