Metal(II) Ion Dependence of the Structures and Properties of Square-Grid Coordination Polymers of Tetrabromobenzenedicarboxylate and Pyrazine as Bridging Ligands
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- Hitoshi Kumagai
- Toyota Central R and D Labs. Inc., 41-1 Yokomichi, Nagakute, Aichi 480-1192 , Japan
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- Norihiko Setoyama
- Toyota Central R and D Labs. Inc., 41-1 Yokomichi, Nagakute, Aichi 480-1192 , Japan
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- Satoshi Kawata
- Fukuoka University, Jonan-ku, Fukuoka 814-0180 , Japan
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- Yoshiyuki Sakamoto
- Toyota Central R and D Labs. Inc., 41-1 Yokomichi, Nagakute, Aichi 480-1192 , Japan
書誌事項
- 公開日
- 2021-03-27
- 資源種別
- journal article
- 権利情報
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- https://academic.oup.com/pages/standard-publication-reuse-rights
- DOI
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- 10.1246/bcsj.20210042
- 公開者
- Oxford University Press (OUP)
この論文をさがす
説明
<jats:title>Abstract</jats:title> <jats:p>In this study, we report the synthesis and crystal structures of coordination polymers employing tetrabromobenzenedicarboxylate (Br4bdc2−) and pyrazine (pyz). Uncoordinated pyz molecules are stabilized between the layers by both hydrogen H-bonding and π–π stacking interactions in [M(Br4bdc)(pyz)(H2O)2](pyz), where M = Co(II) and Zn(II). In addition, water molecules are incorporated between the layers in [Cu(Br4bdc)(pyz)(H2O)2](H2O) owing to Jahn–Teller distortion of the Cu(II) ions, which prevents π–π stacking interactions between the pyz and Br4bdc2−. Depending on the metal(II) centers, structural changes that occur during the heating and hydration processes exhibit different behavior. Co(II) compound slowly changes structure by heating and rapidly recovers the crystalline state in air. Conversely, Zn(II) compound assumes the amorphous phase by heating and slowly yields the crystalline phase in ambient conditions. Although the Cu(II) compound also shows structural changes by heating, the dehydrated phase exhibits hydrophobic characteristics. Ion conductivity measurements of the as-synthesized forms show conductivities of 1.9 × 10−6 Scm−1, 4.6 × 10−7 Scm−1, and 1.3 × 10−6 Scm−1, for the Co(II), Zn(II), and Cu(II) complexes at 90 °C and 95% relative humidity (RH), respectively. The relatively low values of the as-synthesized Co(II) and Zn(II) compounds are attributed to the H-bonding interaction and π–π stacking of pyz molecules, which prevent the dynamics of the pyz molecules needed for proton conduction.</jats:p>
収録刊行物
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- Bulletin of the Chemical Society of Japan
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Bulletin of the Chemical Society of Japan 94 (5), 1571-1578, 2021-03-27
Oxford University Press (OUP)
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詳細情報 詳細情報について
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- CRID
- 1360006973397906432
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- NII論文ID
- 130008053901
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- ISSN
- 13480634
- 00092673
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- 資料種別
- journal article
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- データソース種別
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