Comparative study of XO···ClF and XS···ClF (X = H, CH<sub>3</sub>, and F) halogen‐bonded complexes

Jing, Bo; Liu, Zhenbo; Li, Wenzuo; Cheng, Jianbo; Gong, Baoan; Sun, Jiang

doi:10.1002/qua.22841

Cited by 6 publications

(10 citation statements)

References 38 publications

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“…The authors suggested the potential of GO crosslinked chitosan nanocomposites in the field of biomaterials. [59] Genipin was also used as a crosslinker between GO and chitosan by Li et al [60] This study showed that the presence of GO leads to a more compact arrangement of chitosan matrix due to hydrogen bonding which hindered the water containment and swelling of the nanocomposites. Therefore, by adding GO, the swelling of hydrophilic polymers can be controlled.…”

Section: Go Content/polymermentioning

confidence: 99%

Graphene Oxide/Polymer‐Based Biomaterials

2017

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Since its discovery in 2004, derivatives of graphene have been developed and heavily investigated in the field of tissue engineering. Among the most extensively studied forms of graphene, graphene oxide (GO), and GO/ polymer-based nanocomposites have attracted great attention in various forms such as films, 3D porous scaffolds, electrospun mats, hydrogels, and nacre-like structures. In this review, the most actively investigated GO/ polymer nanocomposites are presented and discussed, these nanocomposites are based on chitosan, cellulose, starch, alginate, gellan gum, poly(vinyl alcohol) (PVA), poly(acrylamide), poly(e-caprolactone) (PCL), poly(lactic acid) (PLLA), poly(lactide-co-glycolide) (PLGA), gelatin, collagen, and silk fibroin (SF). The biological and mechanical performance of such nanocomposites are comprehensively scrutinized and ongoing research questions are addressed. The analysis of the literature reveals overall the great potential of GO/ polymer nanocomposites in tissue engineering strategies and indicates also a series of challenges requiring further research efforts.

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Section: Go Content/polymermentioning

confidence: 99%

Graphene Oxide/Polymer‐Based Biomaterials

2017

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“…[42] The delay observed in the equilibrium time may be due to the 2D nature and barrier properties of the fG flakes, delaying the diffusion of water through the film. [58,65] The few-layer graphene flakes are intrinsically hydrophobic, only their surface was modified to become hydrophilic, and thus the weight fraction of fG incorporated in the FS film may have little contribution to the overall WU. Also, the establishment of a good interface between CHI/fG may result in lower ability for water uptake.…”

Section: Water Uptakementioning

confidence: 99%

“…Similar results were reported in the literature for CHI composites, where a decrease in weight loss and degradation rate of CHI was observed after the incorporation of GO. [65,69]…”

Section: Degradation Testsmentioning

confidence: 99%

“…[86,87] The results obtained in this work are similar to other works where the biological performance of graphenebased composites was evaluated. [65,71] Thus, since a significant increase of the cell proliferation was observed as well as an increase of the FS films stiffness and thermal stability, these multilayered films may find a wide number of applications, such as wound healing, cardiac and bone engineering.…”

Section: Biological Studiesmentioning

confidence: 99%

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Nanostructured Biopolymer/Few‐Layer Graphene Freestanding Films with Enhanced Mechanical and Electrical Properties

Silva

Caridade

Cunha

et al. 2018

Macro Materials & Eng

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In the present work, novel freestanding multilayered films based on chitosan (CHI), alginate (ALG), and functionalized few‐layer graphene are developed through layer‐by‐layer assembly. First, functionalized few‐layer graphene aqueous suspensions are prepared from graphite by a stabilizer‐assisted liquid phase exfoliation process, using a pyrene derivative as stabilizer. Afterward, the films are produced and their physical, morphological, thermal, and mechanical properties are evaluated. Furthermore, their degradation and swelling profiles, as well as their biological behavior, are assessed. The incorporation of functionalized few‐layer graphene results in films with a nanolayered structure, lower roughness than the control CHI/ALG films, and hydrophilic behavior. The mechanical characterization reveals an increase of the Young's modulus, ultimate tensile strength, and elongation at break due to the incorporation of the graphene derivative. A decrease in the electrical resistivity of the multilayered films is also observed. The biological assays reveal improved cytocompatibility toward L929 cells when functionalized few‐layer graphene is incorporated in the CHI/ALG matrix. Therefore, these new graphene‐reinforced multilayered films exhibit interesting properties and great potential for biomedical applications, particularly in wound healing and cardiac and bone tissue engineering.

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“…Other computational studies indicate that the halogen‐bonded HO…ClF complex is more strongly bound than the HS…ClF analogue, but the relative binding strength is reversed when the protons are replaced by methyl groups; i. e. H 3 CO…ClF < H 3 CS…ClF . The variation in the relative strength of halogen and hydrogen bonds in H 2 CS…HOX (X=F, Cl, Br) systems was also investigated, with recommendations made for making halogen bonds stronger than hydrogen bonds .…”

Section: Introductionmentioning

confidence: 99%

Noncovalent Interactions in Complexes Involving the Cyclic C₂H₂X (X=O, S, Se) Molecules and the Lewis Acids YF (Y=F, Cl, Br, H)

2019

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A computational study of the cyclic Lewis bases C2H2X (X=O, S, Se) interacting with the Lewis acids YF (Y=F, Cl, Br, H) in model C2H2X…YF dyads was undertaken. It was shown that the noncovalent X…Y interaction in these binary complexes increases with increasing YF dipole moment for the C2H2O complexes, but not for the C2H2S and C2H2Se complexes, where instead the X…Y interaction increases with increasing X/Y electronegativity difference. This suggests that electrostatic forces dominate the binding in the former, whereas polarization effects dominate in the latter complexes. These explanations were supported by natural bond orbital (NBO) and atoms in molecules (AIM) analyses of the electron density, as well as interaction energy decomposition analyses. A subsequent study of the cooperative effect of an additional hydrogen bond in the model triads, FH…C2H2X…YF and C2H2X…YF…HF, found that the X…Y interaction in the dyads is weakened in the former and strengthened in the latter, with the trends identified in the dyads persisting in both triads.

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Comparative study of XO···ClF and XS···ClF (X = H, CH₃, and F) halogen‐bonded complexes

Cited by 6 publications

References 38 publications

Graphene Oxide/Polymer‐Based Biomaterials

Graphene Oxide/Polymer‐Based Biomaterials

Nanostructured Biopolymer/Few‐Layer Graphene Freestanding Films with Enhanced Mechanical and Electrical Properties

Noncovalent Interactions in Complexes Involving the Cyclic C₂H₂X (X=O, S, Se) Molecules and the Lewis Acids YF (Y=F, Cl, Br, H)

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Comparative study of XO···ClF and XS···ClF (X = H, CH3, and F) halogen‐bonded complexes

Cited by 6 publications

References 38 publications

Graphene Oxide/Polymer‐Based Biomaterials

Graphene Oxide/Polymer‐Based Biomaterials

Nanostructured Biopolymer/Few‐Layer Graphene Freestanding Films with Enhanced Mechanical and Electrical Properties

Noncovalent Interactions in Complexes Involving the Cyclic C2H2X (X=O, S, Se) Molecules and the Lewis Acids YF (Y=F, Cl, Br, H)

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Product

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About

Comparative study of XO···ClF and XS···ClF (X = H, CH₃, and F) halogen‐bonded complexes

Noncovalent Interactions in Complexes Involving the Cyclic C₂H₂X (X=O, S, Se) Molecules and the Lewis Acids YF (Y=F, Cl, Br, H)