journal article·2021-02-10

Exploring Reversible Thermochromic Behavior in a Rare Ni(II)-MOF System

Shihui Zhang, Shuyu Zhang, Nan Yin, Zhenqi Huang, Wenhua Xu, Kefen Yue, Xiuyuan Li, Dongsheng Li

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Abstract

Thermochromic metal-organic frameworks (MOFs) are promising functional materials for a wide range of applications due to their ability to exhibit color variation under external temperature stimuli, yet the development of them with high cyclability and efficient regeneration processes remains challenging. Here, presented is a rare example of an ultrastable Ni(II)-MOF exhibiting an unprecedented reversible four-step color change between two complementary colors in a wide temperature range, which could be repeated for at least 500 cycles without losing crystallinity and thermochromic performance. Notably, the regeneration can be achieved within 1 min by simply letting the crystals cool naturally in the air, facilitated by the unique nature of the channels' inner surface. The reversible thermochromic behavior is owing to a series of reversible crystal structure changes with temperature, including the stepwise dehydration/rehydration process, and structural changes. This work facilitates the future development of more MOF-based reversible thermochromic materials with excellent performance and improved practical applicability.
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Research context

OpenAlex topics: Metal-Organic Frameworks: Synthesis and Applications · Nanoplatforms for cancer theranostics · Transition Metal Oxide Nanomaterials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

College of Chemistry and Materials Science, Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, National Demonstration Center for Experimental Chemistry Education, Shaanxi Key Laboratory of Physico-Inorganic Chemistry, Northwest University, No. 1, Xuefu Ave., Xi’an 710127, China

Thermochemistry Laboratory, Liaoning Province Key Laboratory of Thermochemistry for Energy and Materials, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China

Shaanxi Key Laboratory of Optoelectronic Functional Materials and Devices, School of Materials Science and Chemical Engineering, Xi’an Technological University, Xi’an 710032, China

College of Materials and Chemical Engineering, Hubei Provincial Collaborative Innovation Center for New Energy Microgrid, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, No. 8, Daxue Road, Yichang 443002, China

Funding

National Natural Science Foundation of China · Education Committee of Shaanxi Province · Shaanxi higher education, Young Talent fund of University Association for Science and Technology in Shaanxi

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