中国物理B ›› 2022, Vol. 31 ›› Issue (4): 46501-046501.doi: 10.1088/1674-1056/ac3ecf

• • 上一篇    下一篇

Zero thermal expansion in metal-organic framework with imidazole dicarboxylate ligands

Qilong Gao(高其龙)1,†, Yixin Jiao(焦怡馨)1, and Gang Li(李纲)2,‡   

  1. 1 Key Laboratory of Materials Physics of the Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China;
    2 College of Chemistry and Green Catalysis Center, Zhengzhou University, Zhengzhou 450001, China
  • 收稿日期:2021-07-29 修回日期:2021-11-25 接受日期:2021-12-01 出版日期:2022-03-16 发布日期:2022-03-25
  • 通讯作者: Qilong Gao, Gang Li E-mail:qilonggao@zzu.edu.cn;gangli@zzu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 22071221 and 21905252) and the Natural Science Foundation of Henan Province, China (Grant No. 212300410086).

Zero thermal expansion in metal-organic framework with imidazole dicarboxylate ligands

Qilong Gao(高其龙)1,†, Yixin Jiao(焦怡馨)1, and Gang Li(李纲)2,‡   

  1. 1 Key Laboratory of Materials Physics of the Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China;
    2 College of Chemistry and Green Catalysis Center, Zhengzhou University, Zhengzhou 450001, China
  • Received:2021-07-29 Revised:2021-11-25 Accepted:2021-12-01 Online:2022-03-16 Published:2022-03-25
  • Contact: Qilong Gao, Gang Li E-mail:qilonggao@zzu.edu.cn;gangli@zzu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 22071221 and 21905252) and the Natural Science Foundation of Henan Province, China (Grant No. 212300410086).

摘要: Exploring new abnormal thermal expansion materials is important to understand the nature of thermal expansion. Metal-organic framework (MOF) with unique structure flexibility is an ideal material to study the thermal expansion. This work adopts the high-resolution variable-temperature powder x-ray diffraction to investigate the structure and intrinsic thermal expansion in Sr-MOF ([Sr(DMPhH2IDC)2]n). It has the unique honeycomb structure with one-dimensional (1D) channels along the c-axis direction, the a-b plane displays layer structure. The thermal expansion behavior has strong relationship with the structure, ZTE appears in the a-b plane and large PTE along the c-axis direction. The possible mechanism is that the a/b layers have enough space for the transverse thermal vibration of polydentate ligands, while along the c-axis direction is not. This work not only reports one interesting zero thermal expansion material, but also provides new understanding for thermal expansion mechanism from the perspective of the structural model.

关键词: negative thermal expansion, metal-organic framework, zero thermal expansion, transverse thermal vibration, structure flexibility

Abstract: Exploring new abnormal thermal expansion materials is important to understand the nature of thermal expansion. Metal-organic framework (MOF) with unique structure flexibility is an ideal material to study the thermal expansion. This work adopts the high-resolution variable-temperature powder x-ray diffraction to investigate the structure and intrinsic thermal expansion in Sr-MOF ([Sr(DMPhH2IDC)2]n). It has the unique honeycomb structure with one-dimensional (1D) channels along the c-axis direction, the a-b plane displays layer structure. The thermal expansion behavior has strong relationship with the structure, ZTE appears in the a-b plane and large PTE along the c-axis direction. The possible mechanism is that the a/b layers have enough space for the transverse thermal vibration of polydentate ligands, while along the c-axis direction is not. This work not only reports one interesting zero thermal expansion material, but also provides new understanding for thermal expansion mechanism from the perspective of the structural model.

Key words: negative thermal expansion, metal-organic framework, zero thermal expansion, transverse thermal vibration, structure flexibility

中图分类号:  (Thermal expansion; thermomechanical effects)

  • 65.40.De
61.66.-f (Structure of specific crystalline solids) 61.05.cp (X-ray diffraction) 66.30.hp (Molecular crystals)