Photo‐controlled Hierarchical Assembly and Fusion of Coumarin‐containing Polydiacetylene Vesicles

Li, Jingguo; Jiang, Hao; Hu, Wen-Long; Xia, Hongyan; Zou, Gang; Zhang, Qijin

doi:10.1002/marc.201200620

Cited by 11 publications

(6 citation statements)

References 40 publications

(3 reference statements)

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“…On the basis of literature reports and morphological studies indicated above, a mechanism of the fusion process was proposed (Figure S29 in the SI). Protein-assistance and perturbation-induced processes are two main pathways during membrane fusion in biological and artificial systems. − In the present scenario, perturbation-induction should be the main route. Upon increasing the CN concentration, the collision and membrane contact (perturbations) induced by inevitable Brownian motion of vesicles are more effective.…”

Section: Resultsmentioning

confidence: 93%

Superstructure Formation and Topological Evolution Achieved by Self-Organization of a Highly Adaptive Dynamer

et al. 2016

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The adaptive property of supramolecular building blocks facilitates noncovalent synthesis of soft materials. While it is still a challenging task, fine-tuning and precise control over topological nanostructures constructed from the self-assembly of low-molecular-weight building blocks are an important research direction to investigate the structure–property relationship. Herein, we report controlled self-assembly evolution of a low-molecular-weight building block bearing cholesterol and naphthalene-dicarboximide moieties, showing ultrasensitivity to solvent polarity. In low-polarity solvents (<4), it could form an M-type fiber-constituted organogel (supergel) with high solvent content, columnar molecular packing, and self-healing property. Highly polar solvents (>7.8) favor the formation of P-type helical nanostructures terminated by nanotoroids, having lamellar molecular packing. With a further increase in solvent polarity (up to 9.6), unilamellar and multilamellar vesicles were generated, which could undergo an aggregation-induced fusion process to form branched nanotubes tuned by the concentration. Self-attractive interactions between aggregates were found to be responsible for the formation of superstructures including helix–nanotoroid junctions as well as membrane-fused nanotubes.

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Section: Resultsmentioning

confidence: 93%

Superstructure Formation and Topological Evolution Achieved by Self-Organization of a Highly Adaptive Dynamer

et al. 2016

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“…Diacetylene monomers per se are photoresponsive once they self-assemble into well-aligned patterns that can go through topochemical polymerization to form PDAs because of the light-sensitive butadiyne moiety. Generally, PDAs can be tailor-made to be light-sensitive by grafting photoresponsive moieties into the headgroups of diacetylenes ,,, or by doping photosensitive moieties that could interact with the headgroups of PDAs into the system . However, Yan et al demonstrated that PDA vesicles without functionalization of the headgroup could also be made light-sensitive via a combination of thin film hydration and supercritical CO 2 fluid treatment .…”

Section: Linear Diacetylenes: a Single Polar Headgroup And A Hydropho...mentioning

confidence: 99%

Recent Developments in Polydiacetylene-Based Sensors

2019

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Conjugated polymers are intriguing materials that have potential practical applications in diverse interdisciplinary subjects. Among them, polydiacetylenes (PDAs) have been extensively studied due to their interesting structural, spectral, and optical features. In particular, the unique colorimetric and fluorescent transition of PDAs in response to different external stimuli makes them a novel class of sensing materials, and numerous applications of PDAs as bio-or chemosensors have been explored in the past few decades. In this review, we summarize the latest developments with regard to the applications of PDAs as a class of sensing materials presented in the literature since 2014. This review is sorted into categories based on the structural differences of diacetylene monomers, from which PDAs are generated. In addition, different forms of PDAs and various methods for improving the sensing performance of PDAs are also emphasized.

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“…The peak intensities of Cou‐pal in general vesicles and advanced vesicles are significantly depressed, indicating the generation of supramolecular vesicles . The characteristic peak of v C=O shifts from 1735 cm −1 of general vesicles to 1767 cm −1 of advanced vesicles, suggesting photodimerization of coumarins . To investigate the stability of supramolecular vesicles, the sizes of vesicle solution and then ultrasonication for 30 s were performed by dynamic light scattering (DLS) as shown in Figure D.…”

Section: Resultsmentioning

confidence: 99%

Supramolecular Vesicles Prepared by Photodimerization of Coumarins in the Cavity of γ‐Cyclodextrin

et al. 2017

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Supramolecular vesicles, one of nanocarriers, have unique advantages in loading hydrophobic and/or hydrophilic molecules and releasing the molecules under stimulus conditions. To improve the stability of supramolecular vesicles, we develop advanced vesicles that are prepared by photodimerization of coumarins in the cavity of γ‐cyclodextrin. The construction unit of advanced vesicles contains a head and two tails that looks like the phospholipid molecule. The results confirm that two coumarin molecules can be included and then photodimerized in the cavity of γ‐cyclodextrin. The different wavelengths of UV lamp are used to irradiate the photodimerization of coumarins because the photodimerization efficiency is dependent on the wavelength of UV lamp. The photodimerization of coumarins in the cavity of γ‐cyclodextrin enhances the stability of supramolecular vesicles.

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Photo‐controlled Hierarchical Assembly and Fusion of Coumarin‐containing Polydiacetylene Vesicles

Cited by 11 publications

References 40 publications

Superstructure Formation and Topological Evolution Achieved by Self-Organization of a Highly Adaptive Dynamer

Superstructure Formation and Topological Evolution Achieved by Self-Organization of a Highly Adaptive Dynamer

Recent Developments in Polydiacetylene-Based Sensors

Supramolecular Vesicles Prepared by Photodimerization of Coumarins in the Cavity of γ‐Cyclodextrin

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