Sequential Water Sorption/Desorption of a Nonporous Adaptive Organic Ligand Bridged Coordination Polymer for Atmospheric Moisture Harvesting

Moisture harvesters with favourable attributes such as easy synthetic availability and good processability as alternatives for atmospheric moisture harvesting (AWH) are desirable. We report here a novel nonporous anionic coordination polymer (CP) of uranyl squarate with methyl viologen (MV2+) as cha...

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Bibliographic Details
Published in:Chemistry : a European journal 2023-09, Vol.29 (54), p.e202301929-e202301929
Main Authors: Meng, Liao, Lan, Jian-Hui, Huang, Zhi-Wei, Liu, Yang, Hu, Kong-Qiu, Yuan, Li-Yong, Wang, Xin-Peng, Chai, Zhi-Fang, Mei, Lei, Shi, Wei-Qun
Format: Article
Language:English
Subjects:
Atmospheric moisture
Chemistry
Coordination polymers
Desorption
Ligands
Methyl viologen
Moisture effects
Polymers
Porous materials
Relative humidity
Sorption
Water vapor
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Summary:Moisture harvesters with favourable attributes such as easy synthetic availability and good processability as alternatives for atmospheric moisture harvesting (AWH) are desirable. We report here a novel nonporous anionic coordination polymer (CP) of uranyl squarate with methyl viologen (MV2+) as charge balancing ions (named U-Squ-CP) which displays intriguing sequential water sorption/desorption behavior as the relative humidity (RH) changes gradually. The evaluation of AWH performance of U-Squ-CP shows that it can absorb water vapor under air atmosphere at a low RH of 20% typical of the levels found in most dry regions of the world, and have good cycling durability, thus demonstrating the capability as a potential moisture harvester for AWH. To our knowledge, this is the first report on non-porous organic ligand bridged CP materials for AWH. Moreover, a stepwise water-filling mechanism for the water sorption/desorption process is deciphered by comprehensive characterizations combining single-crystal diffraction, which provides a reasonable explanation for the special moisture harvesting behaviour of this non-porous crystalline material.
ISSN:0947-6539
1521-3765
DOI:10.1002/chem.202301929