scholarly journals Highly stable ionic liquid-in-water emulsions as a new class of fluorescent sensors for metal ions: the case study of Fe3+ sensing

RSC Advances ◽  
2015 ◽  
Vol 5 (47) ◽  
pp. 37385-37391 ◽  
Author(s):  
Alexandre Bettoschi ◽  
Andrea Bencini ◽  
Debora Berti ◽  
Claudia Caltagirone ◽  
Luca Conti ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Metal Ions ◽  
Metal Ion ◽  
Fluorescent Sensor ◽  
Fluorescent Sensors ◽  
Ion Recognition ◽  
New Class

A stable fluorescent ionic liquid can act as a fluorescent sensor for metal ion recognition.

A novel fluorescent probe based on biphenyl and rhodamine for multi-metal ion recognition and its application

2018 ◽  
Vol 47 (10) ◽  
pp. 3378-3387 ◽  
Author(s):  
Xu Tang ◽  
Yun Wang ◽  
Juan Han ◽  
Liang Ni ◽  
Huiqin Zhang ◽  
...  
Keyword(s):  
Metal Ions ◽  
Fluorescent Probe ◽  
Metal Ion ◽  
Ion Recognition

A novel fluorescent probe for the detection of multi metal ions was designed and synthesized based on the fluorophores of biphenyl and rhodamine.

Divalent metal ion-mediated assembly of spherical nucleic acids: the case study of Cu2+

2015 ◽  
Vol 17 (45) ◽  
pp. 30292-30299 ◽  
Author(s):  
Jang Ho Joo ◽  
Jae-Seung Lee
Keyword(s):  
Nucleic Acids ◽  
Metal Ions ◽  
Metal Ion ◽  
Divalent Metal ◽  
Divalent Metal Ions ◽  
New Strategy ◽  
Divalent Metal Ion ◽  
Spherical Nucleic Acids

A new strategy for reversibly assembling spherical nucleic acids (SNAs) is demonstrated based on the coordinative binding of divalent metal ions, particularly Cu2+, to nucleobases.

scholarly journals New Polymerizable Tetraaza Macrocycle Containing Two Acridine Units for Selective Fluorescence Sensing of Metal Ions

2021 ◽  
Author(s):  
Ádám Golcs ◽  
Korinna Kovács ◽  
Panna Vezse ◽  
Péter Huszthy ◽  
Tünde Tóth
Keyword(s):  
Metal Ions ◽  
Biological Samples ◽  
Metal Ion ◽  
Tetraaza Macrocycle ◽  
Fluorescence Sensing ◽  
Ion Recognition ◽  
Thermodynamic Constants ◽  
Recognition Ability ◽  
Immobilized Ionophores

AbstractA new fluorescent bis(acridino)-macrocycle containing two allyl groups was synthesized and photophysically studied. Studies were carried out on metal ion recognition and selectivity-influencing effects including the determination of the relevant thermodynamic constants as logK and pKa. The proposed sensor molecule is recommended for the development of Zn2+-selective optochemical analyzers based on covalently immobilized ionophores as it has a unique pH-independent metal ion recognition ability, which is not influenced by anions and other potentially occurring metal ions in biological samples.

scholarly journals In vitro selection of a sodium-specific DNAzyme and its application in intracellular sensing

2015 ◽  
Vol 112 (19) ◽  
pp. 5903-5908 ◽  
Author(s):  
Seyed-Fakhreddin Torabi ◽  
Peiwen Wu ◽  
Claire E. McGhee ◽  
Lu Chen ◽  
Kevin Hwang ◽  
...  
Keyword(s):  
Metal Ions ◽  
In Vitro Selection ◽  
Fluorescent Sensor ◽  
Critical Role ◽  
Fluorescent Sensors ◽  
Fluorescence Signal ◽  
Divalent Metal Ions ◽  
Intracellular Sensing ◽  
Selection Of

Over the past two decades, enormous progress has been made in designing fluorescent sensors or probes for divalent metal ions. In contrast, the development of fluorescent sensors for monovalent metal ions, such as sodium (Na+), has remained underdeveloped, even though Na+is one the most abundant metal ions in biological systems and plays a critical role in many biological processes. Here, we report the in vitro selection of the first (to our knowledge) Na+-specific, RNA-cleaving deoxyribozyme (DNAzyme) with a fast catalytic rate [observed rate constant (kobs) ∼0.1 min−1], and the transformation of this DNAzyme into a fluorescent sensor for Na+by labeling the enzyme strand with a quencher at the 3′ end, and the DNA substrate strand with a fluorophore and a quencher at the 5′ and 3′ ends, respectively. The presence of Na+catalyzed cleavage of the substrate strand at an internal ribonucleotide adenosine (rA) site, resulting in release of the fluorophore from its quenchers and thus a significant increase in fluorescence signal. The sensor displays a remarkable selectivity (>10,000-fold) for Na+over competing metal ions and has a detection limit of 135 µM (3.1 ppm). Furthermore, we demonstrate that this DNAzyme-based sensor can readily enter cells with the aid of α-helical cationic polypeptides. Finally, by protecting the cleavage site of the Na+-specific DNAzyme with a photolabileo-nitrobenzyl group, we achieved controlled activation of the sensor after DNAzyme delivery into cells. Together, these results demonstrate that such a DNAzyme-based sensor provides a promising platform for detection and quantification of Na+in living cells.

A carbon dot-encapsulated UiO-type metal organic framework as a multifunctional fluorescent sensor for temperature, metal ion and pH detection

2018 ◽  
Vol 6 (16) ◽  
pp. 4396-4399 ◽  
Author(s):  
Chuanxu Yao ◽  
Yan Xu ◽  
Zhiguo Xia
Keyword(s):  
Metal Ion ◽  
Fluorescent Sensor ◽  
Metal Organic Framework ◽  
Fluorescent Sensors ◽  
Carbon Dot ◽  
Metal Organic ◽  
Ph Detection ◽  
Organic Framework

Carbon dot encapsulated UiO-66 composites have been fabricated and designed as multifunctional fluorescent sensors for temperature, pH, and Fe3+ detection.

Macrocyclic host appended carbon nanotubes for selective adsorption of metal ions: combined experimental, DFT and MD studies

2019 ◽  
Vol 4 (3) ◽  
pp. 616-625
Author(s):  
A. K. Singha Deb ◽  
P. Sahu ◽  
Sk. M. Ali
Keyword(s):  
Carbon Nanotubes ◽  
Metal Ions ◽  
Crown Ethers ◽  
Metal Ion ◽  
Selective Adsorption ◽  
Ion Selectivity ◽  
Ion Recognition ◽  
Adsorption Of Metal Ions ◽  
Specific Metal

Crown ethers are very useful for metal ion recognition due to their nanocavity based specific ion selectivity, which on functionalization with carbon nanotubes (CNTs) can be employed as specific metal ion filters by exploiting their different interactions with metal ions.

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