Supramolecular organogels fabricated with dicarboxylic acids and primary alkyl amines: controllable self-assembled structures

Liao, Lieqiang; Zhong, Xiang; Jia, Xinjian; Liao, Caiyun; Zhong, Jinlian; Ding, Shunmin; Chen, Chao; Hong, Sheng; Luo, Xuzhong

doi:10.1039/d0ra05072e

Cited by 19 publications

(9 citation statements)

References 62 publications

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“…The overall shifting of the peak in the region 1690-1525 cm À1 is attributed to the addition of a new peak generated by the CQO stretching of the carboxylic group of PCBA after reaction with the amine group of OA. 46 Further reductions in intensity (1568 cm À1 ) and the absence of a peak (1061 cm À1 ) related to OA in the hybrid material confirm the assembly of PCBA with P3HT NS through acid-base interaction. The surface chemical compositions of both P3HT NS and P3HT-PCBA NS were further characterized via XPS measurement (Fig.…”

Section: Resultsmentioning

confidence: 74%

Donor–acceptor organic nanostructure based on conjugated polymer for improving visible-light-driven photocatalytic activity towards degradation of dye in aqueous medium

et al. 2022

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Section: Resultsmentioning

confidence: 74%

Donor–acceptor organic nanostructure based on conjugated polymer for improving visible-light-driven photocatalytic activity towards degradation of dye in aqueous medium

et al. 2022

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“…To improve the crystallinity of the final product, we explored the use of alternative acid catalysts that could self-assemble in solution and increase the final crystallinity. This was motivated by prior work with thermo-reversible supramolecular two component organo-gels which can be formed by the self-assembly of dicarboxylic acids and primary alkyl amines in polar solvents 43 .…”

Section: Resultsmentioning

confidence: 99%

Enabling Solution Processible COFs through Suppression of Precipitation during Solvothermal Synthesis

Khalil

Meyer

Alazmi

et al. 2022

Preprint

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Covalent organic frameworks (COFs) are crystalline, nanoporous materials of interest for various applications. However, current COF synthetic routes lead to insoluble aggregates which hamper processing and prohibit their use in many applications. Here, we report a novel COF synthesis method that produces a stable, homogeneous suspension of crystalline COF nanoparticles. Our approach involves the use of a polar solvent, di-acid catalyst, and slow reagent mixing procedure at elevated temperatures which all together enable access to crystalline COF nanoparticle suspension that does not aggregate or precipitate when kept at elevated temperatures. On cooling, the suspension undergoes a thermoreversible gelation transition to produce crystalline and highly porous COF materials. We demonstrate that this method enables the preparation of COF monoliths, membranes, and films using conventional solution processing techniques. We show that the modified synthesis approach is compatible with various COF chemistries, including both large- and small-pore imine COFs, hydrazone-linked COFs, and COFs with rhombic and hexagonal topology, and in each case, we demonstrate that the final product has excellent crystallinity and porosity. The final materials contain both micro- and macropores, and the total porosity can be tuned through variation of sample annealing. Dynamic light scattering measurements reveal the presence of COF nanoparticles that grow with time at room temperature, transitioning from a homogeneous suspension to a gel. Finally, we prepare imine COF membranes and measure their rejection of polyethylene glycol (PEG) polymers and oligomers, and these measurements exhibit size-dependent rejection of PEG solutes. This work demonstrates a versatile processing strategy to create crystalline and porous COF materials using solution processing techniques and will greatly advance the development of COFs for various applications.

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“…These organogels can offer controlled drug delivery. They can be used as carriers for multiple purposes [15,32].…”

Section: Supramolecular Organogelsmentioning

confidence: 99%

Organogel: A Propitious Carman in Drug Delivery System

Bedse¹,

Singh²,

Raut³

et al. 2023

Advanced Drug Delivery Systems

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A gel is a semi-solid formulation having an external solvent phase that is either apolar (organogels) or polar (hydrogels) that is immobilized inside the voids contained in a three-dimensional networked structure. Organogels are bi-continuous systems composed of apolar solvents and gelators. When used at a concentration of around 15%, the gelators form self-assembled fibrous structures that become entangled with one another, resulting in the formation of a three-dimensional networked structure. The resulting three-dimensional networked structure blocks the flow of the external apolar phase. Sterol, sorbitan monostearate, lecithin, and cholesteryl anthraquinone derivatives are examples of gelators. The unique characteristics such as thermo-reversibility, viscoelasticity, and versatility impart a longer shelf-life, prolonged drug release, and patient compliance. These characteristics can easily be adjusted by simple formulation modifications, resulting in highly-structured architectures. Organogels are more likely to be used in various types of delivery systems because of their ability to entrap both hydrophilic and hydrophobic molecules inside their structure. Their combination with other materials allows for tailoring their potential as dosage forms. Organogels have potential applicability in numerous ways; hence this article discusses the various aspects of it.

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Supramolecular organogels fabricated with dicarboxylic acids and primary alkyl amines: controllable self-assembled structures

Abstract: A new kind of supramolecular organogel system based on dicarboxylic acids and primary alkyl amines (R–NH2) was obtained, in which the aggregation morphology of gelators could be controlled by solvent polarity and tail chain length.

Cited by 19 publications

References 62 publications

Donor–acceptor organic nanostructure based on conjugated polymer for improving visible-light-driven photocatalytic activity towards degradation of dye in aqueous medium

Donor–acceptor organic nanostructure based on conjugated polymer for improving visible-light-driven photocatalytic activity towards degradation of dye in aqueous medium

Enabling Solution Processible COFs through Suppression of Precipitation during Solvothermal Synthesis

Organogel: A Propitious Carman in Drug Delivery System

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