A novel sensitive fluorescent probe of S2O82− and Fe3+ based on covalent post-functionalization of a zirconium(<scp>iv</scp>) metal–organic framework

Zhu, Shu-Yin; Yan, Bing

doi:10.1039/c8dt02051e

Cited by 66 publications

(31 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In recent years, a huge progress has been made regarding the development of new fluorescent nanomaterials such as quantum dots (QDs) 20 nanodiamonds (NDs) 21 , carbon nanodots (C-dots) 22 , graphene oxide (GO) 23 24 , lanthanide-based upconversion nanoparticles (UCNPs) 25 , luminescent metal organic framework (MOFs) 26 , molecularly imprinted polymers (MIPs) 27 , aggregation-induced emission dots (AIE dots) 28 or metal nanoclusters (NCs) 29 .…”

Section: Development Of Fluorescence Oligonucleotide Probes Based On mentioning

confidence: 99%

Development of fluorescence oligonucleotide probes based on cytosine- and guanine-rich sequences

Dembska

Świtalska

Fedoruk-Wyszomirska

2020

Sci Rep

View full text Add to dashboard Cite

on DNA. Finally, the obtained solution was further stored in the dark at 4 °C for 2 h to prepare stable DNA-AgNCs. The schematic diagram of the preparation of DNA-AgNCs is presented on Scheme 2. Spectroscopy measurements of fluorescent DNA-AgNCs were performed at 25 °C using 2 µM solutions of a ChONC12 oligonucleotide in 10 mM Tris-CH 3 COOH buffer (pH 7.5) as follows. Absorption spectra of fluorescent DNA-AgNCs. UV-Vis spectra of the DNA-AgNCs were recorded in the spectral range of 200-800 nm by means of Jasco V-750 spectrophotometer (Jasco, Tokyo, Japan). CD spectra of fluorescent DNA-AgNCs. CD measurements were carried out on a Jasco J-820 Spectropolarimeter (Jasco, Tokyo, Japan) with connected a temperature controller (PTC-423L). The CD spectra were obtained by taking the average of three scans in the range of 350-200 nm, with a scan rate of 200 nm/min. Fluorescence spectra. Fluorescence measurements were performed on a Jasco spectrofluorimeter FP-8200 (Jasco, Tokyo, Japan) with 10 nm excitation and 10 nm emission slits and were carried out using 0.4 × 1 cm quartz cuvettes containing 1 ml of solution. Excitation and emission spectra of DNA-AgNCs were recorded in the 200-750 nm range with λ ex = 475 nm/λ em = 560 nm, λ ex = 560 nm/λ em = 610 nm. Sample solution containing 2 μM of fluorescent oligonucleotide in 10 mM Tris-CH 3 COOH buffer (pH 7.5) was equilibrated in a quartz cell at 25 °C for 10 min. Measurements of π-A isotherms and fluorescence spectra at the monolayer interface. To obtain the surface pressure-area (π-A) isotherms for the DODAB (dimethyldioctadecylammonium bromide) monolayer and DODAB/ AgNCs complex at the air-water interface we used the computer-contolled balance system (Langmuir trough small, KSV NIMA, Espoo, Finland) as in Ref. 42. The procedure for creating a monolayer using silver nanoclusters consisted of mixing a DODAB surfactant (5 µL, 1 × 10-3 M in CHCl 3) with a ChONC12 oligonucleotide (5 µL, 1 × 10-3 M in water) (1:1 ratio) and AgNO 3 (6 µl, 1 × 10-2 M in water) and such a mixture was applied to the subphase (after 60 min). At a later stage, freshly prepared NaBH 4 (to reduce Ag + ions) was added behind the barriers. The compression as well as fluorescence measurements of monolayer-silver nanoclusters were carried out analogues as in Ref. 42. Fluorescence emission spectra for ChONC12-AgNCs were recorded in the 400-750 nm range, with the excitation wavelength of 460 nm and 550 nm (λ em = 550 nm/λ em = 610 nm).

show abstract

Section: Development Of Fluorescence Oligonucleotide Probes Based On mentioning

confidence: 99%

Development of fluorescence oligonucleotide probes based on cytosine- and guanine-rich sequences

Dembska

Świtalska

Fedoruk-Wyszomirska

2020

Sci Rep

View full text Add to dashboard Cite

show abstract

“…As is well-known, the luminescence quenching by anions is mainly due to the following aspects: (1) structural collapse of the CP framework; 59 (2) interactions between the anions and the framework or central metal; 60 (3) competitive adsorption of excitation or emission frequencies. 57,58,61 or emission bands of 3 (Figure S13), implying that the competitive adsorption of the excitation and emission wavelength energy between 3 and Cr 2 O 7 2− or CrO 4 2− anion was highly responsible for the observed luminescence quenching.…”

Section: Crystal Growth and Designmentioning

confidence: 99%

Nickel(II)-Based Two-Dimensional Coordination Polymer Displaying Superior Capabilities for Selective Sensing of Cr(VI) Ions in Water

Zhou

Shi

Chen

et al. 2019

Crystal Growth & Design

View full text Add to dashboard Cite

Three fluorescent coordination polymers (CPs) including [Zn(ppvppa)(5-NO 2 -1,3-BDC)(H 2 O)] ( 1), [Cd-(ppvppa) Compound 1 has a onedimensional (1D) double-stranded chain structure. 2 and 3 have different two-dimensional (2D) grid-like networks formed by either bridging 1D [Cd(ppvppa) 2 ] n chains with 2,5-FDC ligands or linking 1D [Ni 2 (ppvppa) 2 ] n chains with 5-NO 2 -1,3-BDC ligands. The ligand ppvppa and the three CPs could detect Cr 2 O 7 2− and CrO 4 2− in aqueous solutions by selective fluorescence quenching. The detection limit of the most responsive complex 3 was 1.39 ppb for Cr 2 O 7 2− (pH = 4) or 0.09 ppb for CrO 4 2− (pH = 12), which are below the allowable limits set by the United States Environmental Protection Agency and European Union and the lowest among the known CPs-based sensors. The mechanism of such an emission quenching process may be ascribed to the overlap between the absorption band of the analyte and those of the excitation and emission bands of 3.

show abstract

“…The hydrophobic ZIF‐8 might induce the aggregation of Rha and change the conformation, resulting in the loss of enzyme activity [3,44] . In addition, Rha@MIL‐88B(Fe), Rha@MIL‐101(Cr), and Rha@UiO‐66 (Zr) did not exhibit fluorescence peaks at around 353 nm (Figure S14b‐d), which might be due to that the parent MOFs themselves can emit fluorescence [47–49] . Accordingly, Ce‐BTC is the optimum carrier for Rha immobilization, thus we mainly investigated the Rha@Ce‐BTC sample in the latter experiments.…”

Section: Resultsmentioning

confidence: 99%

Convenient Immobilization of α‐L‐Rhamnosidase on Cerium‐based Metal‐Organic Frameworks Nanoparticles for Enhanced Enzymatic Activity and Recyclability

Peng

Tan

et al. 2021

ChemCatChem

View full text Add to dashboard Cite

The α‐L‐Rhamnosidase (Rha) is a useful glycoside hydrolase for selectively hydrolyzing the terminal L‐rhamnose residues in flavonoids, being vital to food and pharmaceutical industries. However, Rha suffers from low recyclability and poor stability in harsh environments. Herein, we explored five typical metal‐organic frameworks (MOFs) as porous carriers to immobilize Rha, and the activities of the resultant Rha@MOF composites were compared with the free enzyme. The locations of the enzyme in MOFs were proved by a series of characterization techniques. It was found that Rha@Ce‐BTC (with enzyme immobilization efficiency of 23 % and enzyme loading content of 8.8 %) showed the highest enzymatic activity. The immobilized Rha@Ce‐BTC showed 80 % residual activity after five consecutive cycles, suggesting a limited leaching effect. Also, Rha@Ce‐BTC manifested markedly enhanced enzyme‐substrate affinity and catalytic efficiency compared to free Rha, as supported by Michaelis‐Menten kinetic studies. Accordingly, the Ce‐BTC would be an appealing carrier for enzyme immobilization, and the as‐designed enzyme/Ce‐BTC composites are promising candidates for industrial use with remarkably high activity, recyclability, and storage stability.

show abstract

A novel sensitive fluorescent probe of S₂O₈²⁻ and Fe³⁺ based on covalent post-functionalization of a zirconium(iv) metal–organic framework

Cited by 66 publications

References 53 publications

Development of fluorescence oligonucleotide probes based on cytosine- and guanine-rich sequences

Development of fluorescence oligonucleotide probes based on cytosine- and guanine-rich sequences

Nickel(II)-Based Two-Dimensional Coordination Polymer Displaying Superior Capabilities for Selective Sensing of Cr(VI) Ions in Water

Convenient Immobilization of α‐L‐Rhamnosidase on Cerium‐based Metal‐Organic Frameworks Nanoparticles for Enhanced Enzymatic Activity and Recyclability

Contact Info

Product

Resources

About

A novel sensitive fluorescent probe of S2O82− and Fe3+ based on covalent post-functionalization of a zirconium(iv) metal–organic framework

Cited by 66 publications

References 53 publications

Development of fluorescence oligonucleotide probes based on cytosine- and guanine-rich sequences

Development of fluorescence oligonucleotide probes based on cytosine- and guanine-rich sequences

Nickel(II)-Based Two-Dimensional Coordination Polymer Displaying Superior Capabilities for Selective Sensing of Cr(VI) Ions in Water

Convenient Immobilization of α‐L‐Rhamnosidase on Cerium‐based Metal‐Organic Frameworks Nanoparticles for Enhanced Enzymatic Activity and Recyclability

Contact Info

Product

Resources

About

A novel sensitive fluorescent probe of S₂O₈²⁻ and Fe³⁺ based on covalent post-functionalization of a zirconium(iv) metal–organic framework