Hydrogels Facilitated by Monovalent Cations and Their Use as Efficient Dye Adsorbents

Wang, Haiqiao; Xu, Wenlong; Song, Shasha; Feng, Lei; Song, Aixin; Hao, Jingcheng

doi:10.1021/jp500113h

Cited by 53 publications

(51 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The dye concentration decreased sharply after the addition of xerogels, and then decreased gradually, reaching very low value after 30 min (Figure b). As shown in Figure a and b, all the MO content can be adsorbed almost completely within 5 h with a dye adsorption value of 158.9 mg⋅g −1 , which is an excellent result among the reports of other gels . Generally, the dye adsorbing agents should include two domains: hydrophilic domain to interact with water and hydrophobic domain to adsorb the dye ,.…”

Section: Discussionsupporting

confidence: 58%

Amino‐terminated Poly(ethylene glycol) (AT‐PEG) Polymer Hydrogels as Efficient Anionic Dye Adsorbents

Liu

Song

et al. 2018

ChemistrySelect

Self Cite

View full text Add to dashboard Cite

Polymer hydrogels were obtained by mixing the derivative of terpyridine, 4′‐para‐phenylcarboxyl‐2,2′:6′,2′′‐terpyridine (PPCT), and amino‐terminated poly(ethylene glycol) (AT‐PEG) in water. The gelation behaviors, microstructures, rheological properties and application of AT‐PEG/PPCT hydrogels were studied systematically. Microstructures determined by SEM observations demonstrated that the polymer hydrogels were formed by intertwined fibrils. The formation of fibrils was considered to be mainly driven by the electrostatic interaction with the assistance of a delicate balance of various noncovalent interactions, including hydrogen bonding, hydrophobic interaction, van der Waals forces, and etc. The rheological measurements show a strong mechanical strength with an elastic modulus exceeding 5000 Pa and a yield stress exceeding 100 Pa, and which can be regulated by changing the proportion of the gelators. The xerogels exhibited high adsorption efficiency and adsorption capability for the anionic dyes, promised to act as toxic substance adsorbents.

show abstract

Section: Discussionsupporting

confidence: 58%

Amino‐terminated Poly(ethylene glycol) (AT‐PEG) Polymer Hydrogels as Efficient Anionic Dye Adsorbents

Liu

Song

et al. 2018

ChemistrySelect

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, the overall effect on the aggregates depends on several factors such as hydrophobic and electrostatic interactions, electrolyte effects, hydrogen bonding interactions with the aggregates, counter ions and the water molecules, etc. [56][57][58][59] The TEM images of NaDC aggregates in the presence of different concentrations of IL are shown in Fig. 55 The modulation of the aggregated structure of NaDC in the presence of different wt% of IL can be confirmed by TEM and SEM measurements.…”

Section: Microstructuresmentioning

confidence: 74%

Modulation of the aggregation properties of sodium deoxycholate in presence of hydrophilic imidazolium based ionic liquid: water dynamics study to probe the structural alteration of the aggregates

Kundu

Banik

Roy

et al. 2015

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

In this article, we have investigated the effect of a hydrophilic ionic liquid, 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim]-BF4), on the aggregation properties of a biological surfactant, sodium deoxycholate (NaDC), in water. In solution, unlike conventional surfactants it shows stepwise aggregation and the effect of the conventional ionic liquid on the aggregation properties is rather interesting. We have observed concentration dependent dual role of the ionic liquid; at their low concentration, the aggregated structure of NaDC reorganizes itself into an elongated rod like structure. However, the aggregated network is disintegrated into small aggregates upon further addition of ionic liquid. TEM (Transmission Electron Microscopy), SEM (Scanning Electron Microscopy) and FLIM (Fluorescence Lifetime Imaging Microscopy) images also confirmed the structural alteration of NaDC upon varying the concentration of the ionic liquid. The proton NMR data indicate that hydrophobic as well as electrostatic interaction is solely responsible for such structural adaptation of NaDC in the presence of an ionic liquid. The host-guest interaction inside the aggregates is monitored using Coumarin-153 (C-153) and the location of C-153 is probed by varying the excitation wavelength from 375 nm to 440 nm and the two binding sites of the aggregates are affected in a different fashion in the presence of ionic liquid. Excitation in the blue region selects the fluorophores which preferably bind to the buried region of the aggregates, whereas 440 nm excitation corresponds to the guest molecules which are exposed to the solvent molecules. The average solvation time of C-153 is increased in the presence of 1.68 wt% [bmim]-BF4 at λexc = 440 nm i.e. the probe molecules relocate themselves to a more restricted region. However, the average solvation time became 2.6 times faster in the presence of 11.2 wt% [bmim]-BF4, which corresponds to a more polar and exposed region. The time resolved anisotropy measurements and polarity determined by pyrene also supported our results in addition to solvation dynamics measurements. In summary, ionic liquids can modulate the host-guest interaction of bile salt aggregates, which can be used as nanocarriers for drug delivery.

show abstract

“…LCA is a secondary bile acid having a nearly planar steroid backbone and a carboxyl group linked to the steroid backbone through a short alkyl chain. It has been shown that negatively charged LCA in alkaline aqueous solution can self-assemble into tubular structures with different diameters and shapes, depending on experimental conditions [32]- [37]. Figure 3(a) is an AFM image of LCA nanotubes formed in NH 4 OH solution.…”

Section: Resultsmentioning

confidence: 99%

Templated J-Aggregate Nanotubes for the Detection of Dopamine

Rhodes¹,

Wang²,

Liang³

et al. 2017

MSCE

View full text Add to dashboard Cite

J-aggregates of dye molecules are a unique supramolecular structure, which shows great promise in photoelectric devices due to its remarkable optical and transport properties. In this paper, we report the templated formation of J-aggregate nanotubes by the adsorption of 3,3'-diethylthiacarbocyanine iodide on the self-assembled nanotubes of lithocholic acid. The optical and electronic properties of the templated J-aggregate nanotubes are studied. A sensor platform is fabricated by depositing the J-aggregate nanotubes on interdigitated gold electrodes for the detection of dopamine (DA). We find that the current change of the J-aggregate nanotube-based sensor platform in response to DA is linear in the concentration range from 10 nM to 70 nM, giving the detection limit of 0.27 nM.

show abstract

Hydrogels Facilitated by Monovalent Cations and Their Use as Efficient Dye Adsorbents

Cited by 53 publications

References 47 publications

Amino‐terminated Poly(ethylene glycol) (AT‐PEG) Polymer Hydrogels as Efficient Anionic Dye Adsorbents

Amino‐terminated Poly(ethylene glycol) (AT‐PEG) Polymer Hydrogels as Efficient Anionic Dye Adsorbents

Modulation of the aggregation properties of sodium deoxycholate in presence of hydrophilic imidazolium based ionic liquid: water dynamics study to probe the structural alteration of the aggregates

Templated J-Aggregate Nanotubes for the Detection of Dopamine

Contact Info

Product

Resources

About