Optical Anion Sensors Based on Alkyne-Linked, Functionalized Calix[4]pyrroles

2004 ◽  
Vol 69 (5) ◽  
pp. 1027-1049 ◽  
Author(s):  
Hidekazu Miyaji ◽  
Wataru Sato ◽  
Deqiang an ◽  
Jonathan L. Sessler
Keyword(s):  
Fluorescence Quenching ◽  
Anion Recognition ◽  
Organic Media ◽  
Anion Sensor ◽  
New Class ◽  
Naked Eye ◽  
Anion Sensors ◽  
Phosphate Anions

Linking a calix[4]pyrrole anion recognition subunit to chromophores or fluorophores via an alkynyl spacer attached to a β-pyrrolic position of a calix[4]pyrrole core produces a new class of anion sensor that permits the detection of halide and phosphate anions in organic media via direct, so-called "naked-eye" visualization or fluorescence quenching-based spectroscopic means.

scholarly journals Anion and pH dependent molecular motion by a halogen bonding [2]rotaxane

2019 ◽  
Vol 55 (67) ◽  
pp. 9975-9978 ◽  
Author(s):  
Harry A. Klein ◽  
Heike Kuhn ◽  
Paul D. Beer
Keyword(s):  
Molecular Motion ◽  
Anion Recognition ◽  
Colour Change ◽  
Halogen Bonding ◽  
Chloride Anion ◽  
Naked Eye ◽  
Ph Dependent

A halogen bonding [2]rotaxane undergoes macrocycle translocation only upon both protonation and chloride anion recognition, resulting in a naked-eye detectable colour change.

Novel nitro-substituted formazan derivatives: selective ratiometric and colorimetric chemosensors for fluoride anion sensing detectable by the naked eye

2020 ◽  
Vol 44 (22) ◽  
pp. 9485-9492 ◽  
Author(s):  
Gulsen Turkoglu
Keyword(s):  
Anion Recognition ◽  
Fluoride Anion ◽  
Anion Sensing ◽  
First Report ◽  
Naked Eye

This study is the first report of formazan derivatives designed as chemosensors for fluoride anion recognition.

scholarly journals Isatin-1,8-Naphthalimide Hydrazones: A Study of Their Sensor and ON/OFF Functionality

Molecules ◽  
2019 ◽  
Vol 24 (3) ◽  
pp. 397 ◽  
Author(s):  
Pavol Tisovský ◽  
Miroslav Horváth ◽  
Klaudia Csicsai ◽  
Jana Donovalová ◽  
Juraj Filo ◽  
...  
Keyword(s):  
Fluorescence Spectroscopy ◽  
Anion Recognition ◽  
Detection Limits ◽  
Tautomeric Equilibrium ◽  
Light Stimulation ◽  
Anion Sensors

Five novel hydrazones derived from substituted isatins were synthesized as potential anion sensors. Using UV-VIS, FTIR, NMR and fluorescence spectroscopy, these compounds’ tautomeric equilibrium and Z-E photoisomerization were studied in DMF and CHCl3, depending on the hydrazone concentrations, the presence of basic anions and light stimulation. Anion recognition aspects (PF6−, HSO4−, Br−, Cl−, NO3−, F− and CH3COO−) and these receptors’ detection limits were also studied. We also tested the light-stimulated ON-OFF functionality of these compounds in the presence or absence of these anions.

Highly selective naked-eye anion sensors based on thioureido or amido calix[4]arenes

2016 ◽  
Vol 71 (2) ◽  
pp. 113-118
Author(s):  
Susan Bartz ◽  
Daniel T. Schühle ◽  
Joop A. Peters ◽  
Jürgen Schatz
Keyword(s):  
Binding Constants ◽  
Association Constants ◽  
Dihydrogen Phosphate ◽  
Naked Eye ◽  
Optical Readout ◽  
Highly Sensitive ◽  
Anion Sensors ◽  
Self Aggregation

AbstractCalix[4]arene-thiourea and -tetraamide naked-eye receptors do not show any tendency to self-aggregation and are highly sensitive towards small monoanions; association constants in DMSO for halogenides (chloride to iodide) and HSO4– are <200 m–1. Basic anions deprotonate both receptors leading to a high and selective optical readout. Binding constants for carboxylates, fluoride, and dihydrogen phosphate are three orders of magnitude higher (~105m–1) in case of the tetrathiourea receptor.

Triazole appending ruthenium(ii) polypyridine complex for selective sensing of phosphate anions through C–H–anion interaction and copper(ii) ions via cancer cells

2020 ◽  
Vol 44 (16) ◽  
pp. 6186-6196 ◽  
Author(s):  
Mohanraj Ramachandran ◽  
Sambandam Anandan
Keyword(s):  
Fluorescence Quenching ◽  
Cancer Cells ◽  
Fluorescence Enhancement ◽  
Different Types ◽  
Anions And Cations ◽  
Phosphate Anions ◽  
Anion Interaction

Selective fluorescence enhancement by H2PO4−/H2P2O72− anions and maximum fluorescence quenching by Cu2+ ions were attained upon treatment with different types of anions and cations, respectively.

scholarly journals Exploring the Effects of Various Polymeric Backbones on the Performance of a Hydroxyaromatic 1,2,3-Triazole Anion Sensor

Sensors ◽  
2020 ◽  
Vol 20 (10) ◽  
pp. 2973
Author(s):  
Aikohi Ugboya ◽  
Khristal Monroe ◽  
Unodinma Ofulue ◽  
Kayley Yates ◽  
Debanjana Ghosh ◽  
...  
Keyword(s):  
Dihydrogen Phosphate ◽  
Anion Sensor ◽  
Absorption And Fluorescence Spectroscopy ◽  
Uv Illumination ◽  
Acid Methyl ◽  
Phosphate Anions ◽  
Tunable Mechanical Properties ◽  
Spectroscopy Studies ◽  
Derivatives Of ◽  
Higher Sensitivity

Polymeric chemosensors are vital sensing tools because of higher sensitivity compared to their monomeric counterparts and tunable mechanical properties. This study focuses on the incorporation of a hydroxyaromatic 1,2,3-triazole sensor, 2-(4-phenyl 1H-1,2,3-triazol-1-yl)phenol (PTP), into polymers. By itself, the triazole has a selective, fluorometric response to the fluoride, acetate, and dihydrogen phosphate anions, and is most responsive to fluoride. Current investigations probe the suitability of various polymeric backbones for the retention and enhancement of the triazole’s sensing capabilities. Backbones derived from acrylic acid, methyl methacrylate, divinylbenzene, and styrene were explored. UV-illumination, Nuclear Magnetic Resonance (NMR) titration, and ultraviolet-visible (UV-Vis) absorption and fluorescence spectroscopy studies are used to investigate the performance of newly synthesized polymers and the derivatives of PTP that serve as the polymers’ precursors. Among the polymers investigated, copolymers with styrene proved best; these systems retained the sensing capabilities and were amenable to tuning for sensitivity.

A naked-eye, selective and sensitive chemosensor for fluoride ion

2010 ◽  
Vol 64 (6) ◽  
Author(s):  
Puhui Xie ◽  
Fengqi Guo ◽  
Weifeng Wang ◽  
Xiyang Liu
Keyword(s):  
Charge Transfer ◽  
Fluorescence Quenching ◽  
Fluorescence Spectra ◽  
Color Change ◽  
Fluoride Ion ◽  
Absorption And Fluorescence Spectra ◽  
Strong Fluorescence ◽  
Naked Eye ◽  
Acridine Yellow ◽  
Intermolecular Charge Transfer

AbstractEffect of the addition of six different anions on the absorption and fluorescence spectra of acridine yellow G (AYG) was examined. Only the F− anion could induce a visible color change observable with naked eye and a strong fluorescence quenching with K SV of 8.3 × 104 mol−1 L in CH3CN solutions. Calculated results of the interaction between the F− anion and acridine yellow G using the B3LYP/6-31G(d) program showed that the intermolecular charge transfer through the formation of an H-bond between AYG and F− is an essential sensor mechanism.

An anion sensor based on an organic field effect transistor

2015 ◽  
Vol 51 (46) ◽  
pp. 9491-9494 ◽  
Author(s):  
Tsuyoshi Minami ◽  
Tsukuru Minamiki ◽  
Shizuo Tokito
Keyword(s):  
Field Effect ◽  
Field Effect Transistor ◽  
Anion Recognition ◽  
Anion Receptor ◽  
Anion Sensor ◽  
Organic Field Effect Transistor ◽  
Sensor Device ◽  
Effect Transistor ◽  
Basic Anion ◽  
Anion Species

An OFET sensor device possessing an anion receptor was able to electrically detect basic anion species in water, meaning that OFETs can effectively read out anion recognition behaviour of supramolecular receptors.

Plasmonic-ELISA: expanding horizons

RSC Advances ◽  
2016 ◽  
Vol 6 (88) ◽  
pp. 85440-85456 ◽  
Author(s):  
Jitendra Satija ◽  
Nirmal Punjabi ◽  
Debasish Mishra ◽  
Soumyo Mukherji
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Localized Surface Plasmon ◽  
Eye Detection ◽  
Disease Biomarkers ◽  
New Class ◽  
Naked Eye ◽  
Naked Eye Detection

Convergence of localized surface plasmon resonance of metal nanoparticles with classical ELISA has emerged as a new class of immunoassays, i.e. plasmonic ELISA, enabling biocatalysis mediated ultrasensitive naked-eye detection of disease biomarkers.

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