Nanoconfined synthesis of conjugated ladder polymers

Kitao, Takashi; Zhang, Xiyuan; Uemura, Takashi

doi:10.1039/d2py00809b

Cited by 5 publications

(1 citation statement)

References 176 publications

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“…Further, polymer segments capable of engaging in strong interactions with the external ZIF surface dramatically enhance hydrolytic stability at low ZIF concentrations. Beyond providing new opportunities for designing aqueous porous liquids, our mechanistic insights into the infiltration behavior of polymers should be relevant to the use of polymer-functionalized metal–organic frameworks for mixed-matrix membranes, ,, polymerization templates, , and drug delivery. , …”

Section: Discussionmentioning

confidence: 99%

Design Principles for Using Amphiphilic Polymers To Create Microporous Water

DelRe,

Hong,

Wenny

et al. 2023

J. Am. Chem. Soc.

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Aqueous dispersions of microporous nanocrystals with dry, gas-accessible pores�referred to as "microporous water"�enable high densities of gas molecules to be transported through water. For many applications of microporous water, generalizable strategies are required to functionalize the external surface of microporous particles to control their dispersibility, stability, and interactions with other solution-phase components� including catalysts, proteins, and cells�while retaining as much of their internal pore volume as possible. Here, we establish design principles for the noncovalent surface functionalization of hydrophobic metal−organic frameworks with amphiphilic polymers that render the particles dispersible in water and enhance their hydrolytic stability. Specifically, we show that block co-polymers with persistence lengths that exceed the micropore aperture size of zeolitic imidazolate frameworks (ZIFs) can dramatically enhance ZIF particle dispersibility and stability while preserving porosity and >80% of the theoretical O 2 carrying capacity. Moreover, enhancements in hydrolytic stability are greatest when the polymer can form strong bonds to exposed metal sites on the external particle surface. More broadly, our insights provide guidelines for controlling the interface between polymers and metal−organic framework particles in aqueous environments to augment the properties of microporous water.

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