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Zhang et al. Chem Synth 2023;3:10 https://dx.doi.org/10.20517/cs.2022.40 Page 27 of 35

Figure 25. The potential-distance curve indicates the sufficient and necessary condition for the formation of an ordered structure of
atoms. Reproduced with permission [174] . Copyright Chinese Chemical Society.

Figure 26. Occurrence of molecular superfluidity when the channel size of the confined space is reduced to 2 d . Reproduced with
0
permission [174] . Copyright Chinese Chemical Society.
climate or geographical restrictions. Porous adsorbent materials used for psaAWH were systematically
summarized. Based on the water vapor adsorption mechanism of each material, the corresponding water
vapor adsorption/desorption process was presented, the advantages and disadvantages of each adsorbent
were discussed, and their development status was reviewed. Compared with traditional porous adsorbents,
emerging porous materials with unique properties exhibit excellent psaAWH performance. Although the
performance and applicability of psaAWH have improved with the development of various adsorbents, the
industrial application of psaAWH has not been fully realized, and only some patents related to psaAWH
have been applied [176-178] . Table 3 lists the commercial application prospects of different materials. The term
‘uncertain toxicity’ in the table indicates that the constituent elements of the COFs and CPOSs are non-
toxic, but some synthetic monomers may be toxic to the human body or cells; therefore, their toxicity is still
uncertain at present. As shown in Table 3, hydrogels are the most promising materials for commercial