Emissive Metallacycle‐Crosslinked Supramolecular Networks with Tunable Crosslinking Densities for Bacterial Imaging and Killing

Jeyakkumar, Ponmani; Liang, Yongping; Guo, Mengying; Lu, Shuai; Xu, Duanfu; Li, Xiaopeng; Guo, Baolin; He, Gang; Chu, Dake; Zhang, Mingming

doi:10.1002/anie.202005950

Cited by 81 publications

(40 citation statements)

References 57 publications

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“…An upfield shift of this peak by δ 5.53 was observed relative to that of precursor platinum(II) acceptor (Figure 1b), suggesting the formation of metal‐coordinated structure. [ 29‐33 ] In the 1 H NMR spectra (Figures 1c—e), the proton peaks on the pyridyl moieties of metallacycle 3 shifted downfield compared to those of corresponding ligand 1 ( e.g ., H a from δ 8.559 to 8.731), and the proton peaks on Pt(II) acceptor 2 shifted upfield ( e.g ., from δ 8.417 to 8.236), which were induced by the coordination of the pyridine nitrogen‐atom with the Pt(II) center. ESI‐TOF‐MS further illustrated the stoichiometry of obtained metallacycle (Figure 1f).…”

Section: Resultsmentioning

confidence: 99%

Supramolecular Polymer Networks with Enhanced Mechanical Properties: The Marriage of Covalent Polymer and Metallacycle^†

Zhang

Chen

et al. 2021

Chin. J. Chem.

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Main observation and conclusion Supramolecular polymer networks (SPNs) have always been the focus of research due to their novel features of good processability, stimuli‐responsiveness, self‐healing, and recyclability. Herein, we report the preparation of a metallacycle‐linked supramolecular gel via orthogonal metal‐ligand interactions and host‐guest interactions. A triangular metallacycle with three appended 21‐crown‐7 (21C7) units was obtained by the metal coordination of nickel(II)‐salen‐based dipyridyl ligands and platinum(II) acceptors. The integration of this metallacycle and traditional copolymer bearing secondary ammonium salts constructed a SPN via host‐guest recognition between 21C7 units and ammonium salts, and a supramolecular gel further formed at high concentration. Multiple stimulus responsiveness and self‐healing properties of gel were observed. The gel exhibited better stretchability compared to relative gel formed by copolymer alone owing to the synergistic effect of covalent bonds and supramolecular interactions. Moreover, compared to the model gel without metallacycles, the gel showed higher storage and loss moduli, and exhibited stronger stiffness in the self‐healing tests performed with rheometer, indicating the metallacycle played an important role in improving the stiffness and self‐healing of the gel. Therefore, the feasible approach to the formation of SPNs by the marriage of covalent polymers and metallacycles is expected to open a new way to design novel SPNs.

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Section: Resultsmentioning

confidence: 99%

Supramolecular Polymer Networks with Enhanced Mechanical Properties: The Marriage of Covalent Polymer and Metallacycle^†

Zhang

Chen

et al. 2021

Chin. J. Chem.

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“…By utilizing the relationships between these factors and the resultant optical properties, MOCs can be designed to serve as light-emitting materials, [56] light-harvesting systems, [57] information-encryption media, [58] isomerization controllers, [59] protein-delivery carriers, [60] bacterial imaging materials [61] and antibacterial agents (Scheme 2). [62] Most importantly, as theranostic agents, [63] MOCs have been applied in the fields of chemotherapy, photochemotherapy, photodynamic therapy, NIR-II theranostics, etc.…”

Section: S C H E M E 1 Chemical Structures Of Lumiphoresmentioning

confidence: 99%

Metallacycles, metallacages, and their aggregate/optical behavior

Sun

Stang

2021

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Since the first metallacycle was prepared by Verkade in 1983, various metallacycles and metallacages with controllable nanoscale shapes and sizes have been created by modular design and synthesis, showing unique properties that enable applications in catalysis, sensors, and biomedicine. Everything from their photophysical properties to their antitumor activities and catalysis was found to be influenced by their suprastructures. Thus, it is necessary and helpful to develop a systematic understanding of the relationships among the micro/nanostructures, the resultant photophysical/chemical properties, and the corresponding applications. In this review, we summarized the latest progress in this area in approximately the past 5 years.

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“…In additional to macrocycle‐based host–guest interactions, charge transfer and metal coordination interactions are also employed in LCST systems. [ 23–26 ]…”

Section: Thermo‐sensitive Species and Supramolecular Interactions In mentioning

confidence: 99%

“…Metal coordination interactions have also been introduced to PNIPAM systems to develop thermo‐responsive materials by Yang et al. [ 24–26 ] In these systems, the existence of organoplatinum(II) metallacycles exerted a slight influence on the LCST behavior of PNIPAM, and no obvious changes in T cloud were observed.…”

Section: Supramolecular Control Over Polymeric Lcst Systemsmentioning

confidence: 99%

Supramolecular control over thermo‐responsive systems with lower critical solution temperature behavior

et al. 2021

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Lower critical solution temperature (LCST) is the critical temperature below which the solution is miscible for all compositions and above which the solution becomes a suspension. The study of LCST properties has become a central research topic due to its profound impact on the applications of stimuli‐responsive materials. Inspired by the marriage between materials science and supramolecular chemistry, the introduction of supramolecular pairs and interactions into polymeric LCST systems is increasingly practiced. Especially, supramolecular interactions provide precise control over LCST behavior in both water and organic solvents. Furthermore, supramolecular interactions not only control or adjust LCST behavior (supramolecular interaction controlled LCST), but also induce LCST phase behavior in species lack of thermo‐sensitive properties (supramolecular interaction induced LCST). In this review, we summarize the applications of supramolecular interactions in LCST systems. By examining the relationship between supramolecular interactions and LCST changes, we further discuss the differences between supramolecular interaction controlled LCST and supramolecular interaction induced LCST. We hope this review will give our readers a snapshot on how the supramolecular interactions influence the LCST behavior in various systems, and benefit them with different applications.

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Emissive Metallacycle‐Crosslinked Supramolecular Networks with Tunable Crosslinking Densities for Bacterial Imaging and Killing

Cited by 81 publications

References 57 publications

Supramolecular Polymer Networks with Enhanced Mechanical Properties: The Marriage of Covalent Polymer and Metallacycle^†

Supramolecular Polymer Networks with Enhanced Mechanical Properties: The Marriage of Covalent Polymer and Metallacycle^†

Metallacycles, metallacages, and their aggregate/optical behavior

Supramolecular control over thermo‐responsive systems with lower critical solution temperature behavior

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Emissive Metallacycle‐Crosslinked Supramolecular Networks with Tunable Crosslinking Densities for Bacterial Imaging and Killing

Cited by 81 publications

References 57 publications

Supramolecular Polymer Networks with Enhanced Mechanical Properties: The Marriage of Covalent Polymer and Metallacycle†

Supramolecular Polymer Networks with Enhanced Mechanical Properties: The Marriage of Covalent Polymer and Metallacycle†

Metallacycles, metallacages, and their aggregate/optical behavior

Supramolecular control over thermo‐responsive systems with lower critical solution temperature behavior

Contact Info

Product

Resources

About

Supramolecular Polymer Networks with Enhanced Mechanical Properties: The Marriage of Covalent Polymer and Metallacycle^†

Supramolecular Polymer Networks with Enhanced Mechanical Properties: The Marriage of Covalent Polymer and Metallacycle^†