当前位置：
X-MOL 学术
›
Chem. Eur. J.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Aqueous Isolation of 17‐Nuclear Zr/Hf Oxide Clusters during the Hydrothermal Synthesis of ZrO2/HfO2
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2018-09-07 , DOI: 10.1002/chem.201801267 Qing Sun 1 , Caiyun Liu 1 , Guanyun Zhang 1 , Jian Zhang 2 , Chen-Ho Tung 1 , Yifeng Wang 1
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2018-09-07 , DOI: 10.1002/chem.201801267 Qing Sun 1 , Caiyun Liu 1 , Guanyun Zhang 1 , Jian Zhang 2 , Chen-Ho Tung 1 , Yifeng Wang 1
Affiliation
|
Novel 17‐nuclear Zr/Hf oxide clusters ({Zr17} and {Hf17}) are isolated from aqueous systems. In the clusters, Zr/Hf ions are connected through μ3‐O, μ3‐OH, and μ2‐OH linkages into a pinwheel core which is wrapped with SO42−, HCOO−, and aqua ligands. Octahedral hexanuclear Zr/Hf oxide clusters ({Zr6}oct and {Hf6}oct) are also isolated from the same hydrothermal system by decreasing the synthesis temperature. Structures, synthetic conditions, vibrational spectra, and ionic conductivity of the clusters are studied. Structural studies and synthesis inspection suggest that formation of {Zr6}oct and {Zr17} involves assembly of the same transferable building blocks, but the condensation degree and thermodynamic stability of the products increase with hydrothermal temperature. The role of {Zr6}oct and {Zr17} in the formation of ZrO2 nanocrystals are then discussed in the scenario of nonclassical nucleation theory. In addition, the Zr oxide clusters exhibit ionic conductivity owing to the mobility of protons. This study not only adds new members to the Zr/Hf oxide cluster family, but also establishes a connection from Zr4+ ions to ZrO2 in the hydrothermal preparation of zirconium oxide nanomaterials.
中文翻译：
ZrO2 / HfO2水热合成过程中17-核Zr / Hf氧化物簇的水分离
从水体系中分离出新型的17核Zr / Hf氧化物簇（{Zr 17 }和{Hf 17 }）。在集群，锆/铪离子通过μ连接3 -O，μ 3 -OH，和μ 2个-OH键成风车芯，其缠绕有SO 4 2-，HCOO - ，和水中的配体。八面体六核Zr / Hf氧化物簇（{Zr 6 } oct和{Hf 6 } oct通过降低合成温度也可以从相同的水热系统中分离出）。研究了团簇的结构，合成条件，振动光谱和离子电导率。结构研究和综合检查表明，{Zr 6 } oct和{Zr 17 }的形成涉及相同可转移结构单元的组装，但产物的缩合度和热力学稳定性随水热温度而增加。{Zr 6 } oct和{Zr 17 }在ZrO 2形成中的作用然后在非经典形核理论的情况下讨论了纳米晶体。另外，由于质子的迁移，Zr氧化物簇显示出离子电导率。这项研究不仅为Zr / Hf氧化物簇家族增加了新成员，而且在水热制备氧化锆纳米材料中建立了从Zr 4+离子到ZrO 2的连接。
更新日期：2018-09-07
中文翻译：
ZrO2 / HfO2水热合成过程中17-核Zr / Hf氧化物簇的水分离
从水体系中分离出新型的17核Zr / Hf氧化物簇（{Zr 17 }和{Hf 17 }）。在集群，锆/铪离子通过μ连接3 -O，μ 3 -OH，和μ 2个-OH键成风车芯，其缠绕有SO 4 2-，HCOO - ，和水中的配体。八面体六核Zr / Hf氧化物簇（{Zr 6 } oct和{Hf 6 } oct通过降低合成温度也可以从相同的水热系统中分离出）。研究了团簇的结构，合成条件，振动光谱和离子电导率。结构研究和综合检查表明，{Zr 6 } oct和{Zr 17 }的形成涉及相同可转移结构单元的组装，但产物的缩合度和热力学稳定性随水热温度而增加。{Zr 6 } oct和{Zr 17 }在ZrO 2形成中的作用然后在非经典形核理论的情况下讨论了纳米晶体。另外，由于质子的迁移，Zr氧化物簇显示出离子电导率。这项研究不仅为Zr / Hf氧化物簇家族增加了新成员，而且在水热制备氧化锆纳米材料中建立了从Zr 4+离子到ZrO 2的连接。
京公网安备 11010802027423号