Iodine decorated-UiO-67 MOF as a fluorescent sensor for the detection of halogenated aromatic hydrocarbons

2020 ◽  
Vol 44 (21) ◽  
pp. 8937-8943
Author(s):  
Fataneh Norouzi ◽  
Hamid Reza Khavasi
Keyword(s):  
Aromatic Hydrocarbons ◽  
Fluorescent Sensor ◽  
Strong Fluorescence ◽  
Halogenated Aromatic Hydrocarbons ◽  
Fluorescence Response

An iodine-decorated UiO-67 MOF, UiO-67(I)2 is constructed via the incorporation of iodine groups into the BPDC linker. This decorated MOF exhibited a strong fluorescence response towards halogenated aromatic hydrocarbons (HAHs).

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>

scholarly journals Flexibility and Preorganization of Fluorescent Nucleobase-Pyrene Conjugates Control DNA and RNA Recognition

Molecules ◽  
2020 ◽  
Vol 25 (9) ◽  
pp. 2188 ◽  
Author(s):  
Željka Ban ◽  
Josipa Matić ◽  
Biserka Žinić ◽  
Anders Foller Füchtbauer ◽  
L. Marcus Wilhelmsson ◽  
...  
Keyword(s):  
Amino Acid ◽  
Rna Recognition ◽  
Strong Fluorescence ◽  
Fluorescence Response ◽  
Dna And Rna ◽  
Base Derivative ◽  
Emission Change ◽  
Similar Affinity

We synthesized a new amino acid-fluorescent nucleobase derivative (qAN1-AA) and from it two new fluorescent nucleobase–fluorophore (pyrene) conjugates, whereby only the analogue with the longer and more flexible linker (qAN1-pyr2) self-folded into intramolecularly stacked qAN1/pyrene conformation, yielding characteristic, 100 nm-red-shifted emission (λmax = 500 nm). On the contrary, the shorter and more rigid linker resulted in non-stacked conformation (qAN1-pyr1), characterized by the emission of free pyrene at λmax = 400 nm. Both fluorescent nucleobase–fluorophore (pyrene) conjugates strongly interacted with ds-DNA/RNA grooves with similar affinity but opposite fluorescence response (due to pre-organization), whereas the amino acid-fluorescent base derivative (qAN1-AA) was inactive. However, only intramolecularly self-folded qAN1-pyr2 showed strong fluorescence selectivity toward poly U (Watson–Crick complementary to qAN1 nucleobase) and poly A (reverse Hoogsteen complementary to qAN1 nucleobase), while an opposite emission change was observed for non-complementary poly G and poly C. Non-folded analogue (qAN1-pyr1) showed no ss-RNA selectivity, demonstrating the importance of nucleobase-fluorophore pre-organization.

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