Reusable Xerogel Containing Quantum Dots with High Fluorescence Retention

Liang, Xiang-Yong; Wang, Lu; Chang, Zhi-Yi; Ding, Li‐Sheng; Li, Bang‐Jing; Zhang, Sheng

doi:10.3390/polym10030310

Cited by 10 publications

(7 citation statements)

References 65 publications

(81 reference statements)

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“…Likewise, the second study reports the fabrication of host-guest aerogels containing fluorescently active quantum dots. In the same way that the interaction with CD protects the small molecules from degradation, this study demonstrated the fluorescence-retention potential of quantum dots upon complexation/interaction with β-CD [3].…”

supporting

confidence: 55%

“…By encapsulating oxygen into the cavities of α-CD and α-CD polymers, in vitro cell studies demonstrated a marked reduction in hypoxia-reoxygenation injury, leading to favorable cell growth and lowered cell mortality [4]. Similar to the approach reported by the first two studies [2,3], the fourth study reported the fabrication of a polyrotaxane (PR) containing α-CD and poly [ethylene glycol] containing silver sulfadiazine. When encapsulated in the PR matrix, silver sulfadiazine demonstrated not only superior antibacterial activity against E. coli and S. aureus, but also resistance to light-induced degradation [5].…”

mentioning

confidence: 93%

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Host–Guest Polymer Complexes

2018

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The discovery of host-guest complexation has resulted in significant advancements in various facets of materials science, including: drug delivery, tissue engineering, etc. Various host molecules such as cyclodextrins (CD), urea, thiourea, cyclo-triphosphazines, pillar [6]arene, cucurbit [6]uril, and calix[4]arene have been identified as undergoing inclusion complexation with a range of guest molecules. Among these host molecules, cyclodextrins are well-known for their complexation capabilities with a variety of guest molecules. Through such complexation, the stability of the guest against thermo-chemical, environmental, light, and air degradation is ensured. In addition, the widespread availability of CD-derivatives (randomly methylated, 2-hydroxypropylated, etc.) has partly contributed to their widespread use in applications extending from textiles to pharmacologics to nuclear waste removal. Another benefit of forming such complexes is that they improve the polymeric properties (for example, mechanical, rheological, and thermal properties) by coalescing the guest polymers from their CD inclusion complexes.While the host-guest complexation occurs predominantly via non-covalent interactions, the underlying mechanism differs among the studied guest molecules, with predominant complexation occurring via hydrogen and ionic bonding, van der Waals and hydrophobic forces/interactions. Even though the mechanisms differ between the chosen host/guest molecules, a common criterion for successful complexation remains lowered Gibbs free energy, which can occur either by an enthalpyor an entropy-driven process. The thermodynamics of the host-guest complexation and associated binding constants are typically characterized using spectroscopy-based techniques such as nuclear magnetic resonance, UV-vis, mass spectrometry, fluorescence-based spectroscopy or calorimetric techniques such as differential scanning and isothermal titration calorimetry [1]. With such a wide range of possibilities in terms of guest and host molecules in host-guest chemistry, the purpose of this special Issue is to provide the latest advancements as well as novel applications of these host-guest compounds.This Special Issue consists of 15 articles, including four comprehensive review articles, written by experts in the field. The first eleven articles are dedicated to the synthesis and characterization of host-guest containing compounds for the fabrication of devices, in particular for biomedical applications. The next four articles are comprehensive review articles discussing the state-of-art synthesis, characterization, and fabrication of various host-guest complexes, including CD-polymer, amylose-polymer, polysaccharide-metal ion, and urea-polymer inclusion complexes. In this series, the first research article reports the synthesis of novel host-guest supramolecular hydrogels comprised of pNIPAm microgels bearing poly[acrylic acid] with attached β-CDs as the host and adamantane-dextrans as the guest molecules. By forming in situ complexation, hydrogel...

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confidence: 55%

mentioning

confidence: 93%

Host–Guest Polymer Complexes

2018

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“…It is well known that β-CD can form stable inclusion complexes with adamantane and its derivatives in an aqueous environment; 32 similarly, Poly-CD can also form the inclusion complex (HEMA-Ad@Poly-CD) with HEMA-Ad. The host− guest interaction between HEMA-Ad and Poly-CD was studied by 2D NOESY spectroscopy.…”

Section: Resultsmentioning

confidence: 99%

Tough Self-Healing Elastomers Based on the Host–Guest Interaction of Polycyclodextrin

Hou

Zhang

et al. 2019

ACS Appl. Mater. Interfaces

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Inspired by animal muscles, we developed a kind of tough elastomers combining high strength and high stretchability with autonomous self-healing capability. A key structural feature is the construction of a double network (DN) connected by the hydrogen bond and host−guest interactions. The first network is the classic elastomer polyacrylate matrix cross-linked by strong hydrogen bonding. The second network is formed through the host−guest interactions between polycyclodextrin and the adamantane (Ad) groups on the side of the polyacrylate chain. Supramolecular interactions between two networks make them miscible and interpenetrate in the molecular level and then can share the load as the sample was stretched. The host−guest interactions act not only as sacrificial bonds for energy dissipation but also as self-healing driving forces. The tensile strength of the DN elastomer reaches about 6.7 MPa and the strain is as high as about 950%. The DN elastomer can be easy to repair by touching the damaged surface together at ambient conditions when broken or cut. The recovered tensile strength can reach over 4.5 MPa, which is better than the most pristine strength of existing spontaneous self-healing elastomers.

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“…2.14. Fe(acac) 3 @SiO 2 @PVA hybrid X-G superparamagnetic nanocomposites In previous decades, nanotechnologies had attained high success in fabrication and characterizing of magnetic nanocomposites with customized properties, capable of being utilized in versatily in as drug/gene delivery, bioseparation, magnetic resonance imaging, hyperthermia and as catalysts in chemical synthesization [20][21][22][23].…”

Section: Fabrication and Properties Of Cork@silica X-g Nanocompositesmentioning

confidence: 99%

Characterization and Fabrication of Xerogel Polymeric Nanocomposites and Multifunctional Applications

Idumah

2022

Preprint

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Xerogel (X-G)@polymeric nanocomposites are hybrid nanomaterials constituted of xerogels (X-Gs) synergized with polymeric materials with enclosed nanoparticulates in either physical or covalently inclined cross-linking with one another and/or with the nano-substrates. X-G@biopolymeric bionanocomposites are hybrid bionanomaterials constructed by synergizing biopolymeric matrices with dispersed organic or inorganic nanoparticulates with improved properties for multifunctional applications. Hence, this paper elucidates novel trends in synthesis, construction, characterizations, properties and multifunctional applications of X-G@polymeric nanocomposites.

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Reusable Xerogel Containing Quantum Dots with High Fluorescence Retention

Cited by 10 publications

References 65 publications

Host–Guest Polymer Complexes

Host–Guest Polymer Complexes

Tough Self-Healing Elastomers Based on the Host–Guest Interaction of Polycyclodextrin

Characterization and Fabrication of Xerogel Polymeric Nanocomposites and Multifunctional Applications

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