Recognition of silver cations by multifarene[2,2] chemosensors with unexpected fluorescence response

2019 ◽  
Vol 218 ◽  
pp. 213-220 ◽  
Author(s):  
Yin-Hui Huang ◽  
Qing-Mei Ge ◽  
Yong-Yi Zhao ◽  
Hang Cong ◽  
Jiang-Lin Zhao ◽  
...  
Keyword(s):  
Fluorescence Response ◽  
Silver Cations

A Boronic Acid-Based Fluorescence Hydrogel for Monosaccharide Detection

2018 ◽  
Author(s):  
Suying Xu ◽  
Adam Sedgwick ◽  
Souad Elfecky ◽  
Wenbo Chen ◽  
Ashley Jones ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Boronic Acid ◽  
Binding Constants ◽  
Strong Fluorescence ◽  
Fluorescence Response ◽  
Turn On ◽  
Fluorescence Turn On ◽  
Hydrogel System

<p>A boronic acid-based anthracene fluorescent probe was functionalised with an acrylamide unit to incorporate into a hydrogel system for monosaccharide detection<i>. </i>In solution, the fluorescent probe<b> </b>displayed a strong fluorescence turn-on response upon exposure to fructose, and an expected trend in apparent binding constants, as judged by a fluorescence response where D-fructose > D-galactose > D-mannose > D-glucose. The hydrogel incorporating the boronic acid monomer demonstrated the ability to detect monosaccharides by fluorescence with the same overall trend as the monomer in solution with the addition of fructose resulting in a 10-fold enhancement (≤ 0.25 M). <b><u></u></b></p>

Performance of Ag-HZSM-5 Zeolite Catalysts in n-heptane Conversion

2017 ◽  
Vol 68 (1) ◽  
pp. 116-120
Author(s):  
Iuliean Vasile Asaftei ◽  
Neculai Catalin Lungu ◽  
Lucian Mihail Birsa ◽  
Ioan Gabriel Sandu ◽  
Laura Gabriela Sarbu ◽  
...  
Keyword(s):  
Aromatic Hydrocarbons ◽  
Metal Content ◽  
Pulse Method ◽  
Acid Strength ◽  
Strength Distribution ◽  
Zeolite Catalysts ◽  
Benzene Toluene ◽  
Acid Strength Distribution ◽  
Silver Cations ◽  
Heptane Conversion

The conversion of n-heptanes into aromatic hydrocarbons benzene, toluene and xylenes (BTX), by the chromatographic pulse method in the temperature range of 673 - 823K was performed over the HZSM-5 and Ag-HZSM-5 zeolites modified by ion exchange with AgNO3 aqueous solutions. The catalysts, HZSM-5 (SiO2/Al2O3 = 33.9), and Ag-HZSM-5 (Ag1-HZSM-5 wt. % Ag1.02, Ag2-HZSM-5 wt. % Ag 1.62; and Ag3-HZSM-5 wt. % Ag 2.05 having different acid strength distribution exhibit a conversion and a yield of aromatics depending on temperature and metal content. The yield of aromatic hydrocarbons BTX appreciably increased by incorporating silver cations Ag+ into HZSM-5.

scholarly journals Tailoring an HSO4− anion hybrid receptor based on a phenazine derivative

2020 ◽  
Vol 19 (10) ◽  
pp. 1373-1381
Author(s):  
Xiao-Ni Qi ◽  
Hong-Qiang Dong ◽  
Hai-Long Yang ◽  
Wen-Juan Qu ◽  
You-Ming Zhang ◽  
...  
Keyword(s):  
Fluorescence Response ◽  
Phenazine Derivative

A hybrid PD-based receptor was tailored for capturing HSO4− anions. It could display not only a preferable sensitivity with a “turn–off” fluorescence response, but also a strong anti-interference toward other common anions.

scholarly journals Silver quasi-nanoparticles: bridging the gap between clusters molecular-like and plasmonic nanoparticles

2021 ◽  
Author(s):  
Fatima Douma ◽  
Louwanda Lakiss ◽  
Oleg I. Lebedev ◽  
Julien Cardin ◽  
Krassimir L. Kostov ◽  
...  
Keyword(s):  
Electrochemical Reduction ◽  
Plasmonic Nanoparticles ◽  
Zeolite X ◽  
New Strategy ◽  
Type Zeolite ◽  
Optical Behavior ◽  
Silver Cations

Herein, we report a new strategy for preparing connected silver sub-nanoparticles with unique optical behavior via a selective photo-assisted electrochemical reduction of silver cations in FAU-type zeolite X (FAUX) cages....

scholarly journals Single-stranded DNA probe paired aptasensor with extra dye binding sites to enhance its fluorescence response in the presence of a target compound

RSC Advances ◽  
2021 ◽  
Vol 11 (35) ◽  
pp. 21796-21804
Author(s):  
Seo Won Cho ◽  
Hyun Jeong Lim ◽  
Beelee Chua ◽  
Ahjeong Son
Keyword(s):  
Binding Sites ◽  
Dna Probe ◽  
Target Compound ◽  
Single Stranded Dna ◽  
Fluorescence Response ◽  
Dye Binding

Principle of an ssDNA paired aptasensor where extra dye binding sites are created to enhance its fluorescence response.

How switching the substituent of a pyrene derivative from a methyl to a butyl affects the fluorescence response of polystyrene randomly labeled with pyrene

2010 ◽  
Vol 88 (3) ◽  
pp. 217-227 ◽  
Author(s):  
Mark Ingratta ◽  
Manoj Mathew ◽  
Jean Duhamel
Keyword(s):  
Organic Solvents ◽  
Excellent Agreement ◽  
Fluorescence Spectra ◽  
Series Solutions ◽  
Specific Nature ◽  
Polymer Backbone ◽  
Excimer Fluorescence ◽  
Fluorescence Response ◽  
Different Types ◽  
Blob Model

A series of polystyrenes randomly labeled with 1-pyrenebutanol were prepared by copolymerizing styrene and 1-pyrenebutylacrylate yielding the CoBuE–PS series. Solutions of CoBuE–PS were prepared in nine organic solvents having viscosities ranging from 0.36 to 5.5 mPa·s and the fluorescence spectra and pyrene monomer and excimer fluorescence decays were acquired. Analysis of the fluorescence spectra yielded the IE/IM ratio, whereas analysis of the fluorescence decays with the fluorescence blob model (FBM) yielded the parameters N blobo , <kblob × Nblob> , and k blobo . These parameters were compared to those obtained with two other series of pyrene-labeled polystyrenes, which had been studied earlier, namely CoA–PS and CoE–PS where pyrene was attached to the polymer backbone via a methylamide and benzyl methylether linker, respectively. Although the parameters IE/IM, N blobo , <kblob × Nblob>, and k blobo took different values according to the specific nature of the linker connecting pyrene to the polystyrene backbone, they exhibited trends that were quite similar for all the pyrene-labeled polystyrene constructs. The excellent agreement between the parameters retrieved for the three different types of pyrene-labeled polystyrenes suggests that the FBM accounts satisfyingly for differences in the nature of the label used, while still retrieving information pertinent to the polymer of interest.

Fluorescent zinc and copper complexes for detection of adrafinil in paper-based microfluidic devices

2016 ◽  
Vol 52 (53) ◽  
pp. 8279-8282 ◽  
Author(s):  
Mehmet Gokhan Caglayan ◽  
Sara Sheykhi ◽  
Lorenzo Mosca ◽  
Pavel Anzenbacher
Keyword(s):  
Copper Complexes ◽  
Microfluidic Devices ◽  
Fluorescence Response

Zn(ii) and Cu(ii) complexes are used in the recognition and sensing of adrafinil through an easy-to-detect fluorescence response.

Competitive binding for triggering a fluorescence response in a hydrazodicarboxamide-based [2]rotaxane

2014 ◽  
Vol 12 (3) ◽  
pp. 474-478 ◽  
Author(s):  
José Berná ◽  
Carlos Franco-Pujante ◽  
Mateo Alajarín
Keyword(s):  
Competitive Binding ◽  
Fluorescence Response
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