Hydrogels Triggered by Metal Ions as Precursors of Network CuS for DNA Detection

Abstract

The gelation behavior of lithocholate (LC(-) ) with different metal ions in water was investigated. The microstructures of hydrogels were determined to be three-dimensional (3D) networks of fibrous aggregates. The formation of fibrils was speculated to be mainly driven by the coordination between carboxylate of LC(-) and metal ions, accompanied by the assistance of noncovalent interactions such as electrostatic and hydrophobic interactions. The hydrogels, which can maintain the mechanical strength at higher temperature, exhibit thermal stability. Their gelation capability was enhanced with the increase in acidity. The hydrogels of LC(-) and Cu(2+) mixtures served as the precursors for producing network nanostructures of CuS nanoparticles. These new CuS networks exhibit high fluorescence quenching ability and can act as an effective fluorescent sensing platform for ssDNA detection.

Hydrogels Based on Ag+‐Modulated Assembly of 5′‐Adenosine Monophosphate for Enriching Biomolecules

“…Figure d shows the elastic modulus ( G ′) as a function of shear stress ( τ ). The yield stress ( τ *), at which G ′ decreases sharply because the shear stress is high enough to break the network structures of the hydrogels, can be obtained . As c increases from 10 to 40 mmol L −1 , τ * increases from about 1 to 1000 Pa and G ′ increases from about 50 to 30 000 Pa, which indicates the significant effect of Ag + on gelation.…”

A Thermally Stable Polyamine/Unsaturated Fatty Acid System: Gelation Behaviors and Application

“…The protonated primary amino groups lose the ability of hydrogen bonding with oleate (Scheme ). The disruption of the H‐bonding network may also induce the gel–sol transition in the gel system (Wang et al, ; Yoo, ).…”

Metallosurfactant Ionogels in Imidazolium and Protic Ionic Liquids as Precursors To Synthesize Nanoceria as Catalase Mimetics for the Catalytic Decomposition of H2O2

“…[6,20] As for ionogels, LMWGs are av ery important class of additive component. [6,21] For example, D'Annaa nd co-workers constructed interesting ionogels by using diimidazoliuma nd dipyrrolidinium salts. [6,21] For example, D'Annaa nd co-workers constructed interesting ionogels by using diimidazoliuma nd dipyrrolidinium salts.…”

“…[9,12,13,30,31] Little work has been reported concerning the preparation of nanomaterials by using ionogelsa s precursors. [21,33] Generally,m etal ions need to be introduced into the systems when preparing nanomaterials, [21,34] whereas metallosurfactants can be effectively used as the metal sources whent hey are used to prepare nanomaterials. [32] By contrast, more reports have described the synthesis of nanomaterials with hydrogel templates.…”

“…They can self-assemble into various microstructures [9,12,13,15] through noncovalent interactions, such as hydrogen bonding, electrostatic interactions, coordination, and van der Waals forces. [6,21] For example, D'Annaa nd co-workers constructed interesting ionogels by using diimidazoliuma nd dipyrrolidinium salts. [22,23] The dicationic organic salts displayed good gelation ability for variousI Ls and provided useful information about the preparation of ionogels.…”