Language：English  

DOI： 10.1038/s41467-024-51715-w

Web of Science

PubMed

Publisher：Advanced Functional Materials  

Fluorocarbon gases are regarded as one of the largest contributors to serious environmental problems such as ozone-depletion and global warming, and thus, the development of reclamation technologies is in great demand for reducing emission of such harmful compounds. So far, porous materials such as zeolites, activated carbons, and metal-organic frameworks (MOFs) have been examined as solid-state absorbents for fluorocarbon gases. However, such porous materials often suffer from a lack of size-selectivity in fluorocarbon gas uptakes due to the large-sized cavities (>1 nm). Herein, it is reported that macrocyclic pillar[n]quinones (P[n]Q, n = 5 or 6) in crystalline state show size-selective uptake for fluorocarbon gases owing to their molecular-scale cavities (<1 nm). The P[n]Q also show uptake behaviors for volatile halogenated organic compounds (VHOCs), which are highly toxic. Interestingly, the volatilities of VHOCs within the 1D channels of P[5]Q are drastically reduced compared with those of the bulk VHOC solvents. Experimental results and computational analyses revealed that the excellent storage abilities of the crystalline P[n]Q are a synergic result of their electron-deficient macrocyclic scaffolds and the basic carbonyl oxygen atoms on their rims.

DOI： 10.1002/adfm.202312304

Web of Science

Scopus

Language：English   Publisher：Journal of Materials Chemistry B  

The exogenous administration of nitric oxide (NO) is considered a potential therapeutic treatment against a great variety of diseases due to its significant role in multiple physiological functions. Due to the gaseous nature, short lifetime and dose- and tissue-dependent activity of this molecule, the development of new administration procedures is required to control the NO delivery in terms of dosage, timing, and location. In this work, we propose a new molecular material based on robust metal-organic polyhedra (MOPs) for controlled NO release. We select dirhodium paddlewheel complex-based cuboctahedral MOPs (RhMOP), in which NO can chemically coordinate to the open-metal sites at the axial sites of dirhodium paddlewheel moieties. We further prepare amorphous coordination polymer particles (CPPs) by connecting RhMOP with bis(imidazole) linkers at the external axial sites. Both molecular MOPs and polymeric CPPs show relevant NO payloads and the release of NO can be triggered by two different stimuli: light and humidity. We show that imidazole ligands coordinating to the external axial sites of the paddlewheel moieties tune the light-triggered NO release property. We further demonstrate that the size and the extrinsic pores of CPPs are important for enhanced NO release.

DOI： 10.1039/d3tb02162a

Web of Science

Scopus

PubMed