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Anions fluorescence sensing

Figure 1. (Bottom) Diagram of the electrostatic potential adjacent to a membrane bearing a positive charge. The zeta potential is the potential at the hydrodynamic plane of shear, which should be about 2 A from the surface of the membrane. (Top) Schematic of the location of the probe molecules used to detect the potential produced by the adsorption of calcium and other alkaline earth cations to membranes formed from PC. The divalent cation cobalt and the amphipathic, anionic, fluorescent probe TNS will sense the potential at the interface. The non-actin-Rf complex will sense the potential in the center of the membrane. Figure 1. (Bottom) Diagram of the electrostatic potential adjacent to a membrane bearing a positive charge. The zeta potential is the potential at the hydrodynamic plane of shear, which should be about 2 A from the surface of the membrane. (Top) Schematic of the location of the probe molecules used to detect the potential produced by the adsorption of calcium and other alkaline earth cations to membranes formed from PC. The divalent cation cobalt and the amphipathic, anionic, fluorescent probe TNS will sense the potential at the interface. The non-actin-Rf complex will sense the potential in the center of the membrane.
The anthracenylmethyl lariat ether shown as (10) was reported by de Silva and coworkers (1986) as a crown that is useful for fluorescence sensing. Binding of K+ resulted in a detectable fluorescence emission signal. Recent advances in this area include the development of compounds that can sense ion pairs. The anthracenyl crown shown as (11) was designed to simultaneously sense sodium and phosphate ions (de Silva, 2003). Excitation of the complex with ultraviolet radiation results in a fluorescent output only when Na+ is complexed in the crown and the ammonium groups are bound to the anion. The complex self-quenches in the case when either no or only one of the ions is present. [Pg.257]

Recently, Czamik et al. have reported the use of the acyclic protonated amine host 9 as a chemosensor of pyrophosphate. Typical fluorescence sensing methods rely on the ability of a complexed anion to quench the fluorophore. The fluorescence intensity of host 9, however, is actually increased upon complexation of anions and its 2200-fold selectivity of pyrophosphate over phosphate allows for real-time assay of pyrophosphate hydrolysis by inorganic pyrophosphatase.18... [Pg.294]

Since coordinatively unsaturated Zn polyamine complexes display a good affinity towards the COO group, the [Zn (42)] + platform was first tested for fluorescent sensing of carboxylate anions. For instance, there is evidence from spec-trophotometric titration experiments that [Zn (42)] + forms a stable adduct with benzoate, in ethanolic solution at 25 °C. However, even after the addition of a large excess of benzoate to an ethanolic solution of [Zn (42)] +, the typical fluorescent emission of the anthracene fragment is not altered at all. Quite interestingly, when a solution of [Zn (42)] " is titrated with the 4-A,JV-dimethylamine-benzoate anion, the anthracene emission is progressively quenched the fluorescence intensity, Ip, versus anion equivalents profile corresponds to the formation of a T. 1 adduct, and... [Pg.2145]

Fluorescence Sensing of Anions, p. 566 Guanidium-Based Anion Receptors, p. (575 Halogen Bonding, p. 628 Macrocyclic Synthesis, p. 830 Molecular Squares, Boxes, and Cubes, p. 909 Naked Anion Effect, p. 939 Organometallic Anion Receptors, p. 1006 Rotaxanes and Pseudorotaxanes, p. 1194 Self-Assembly Definition and Kinetic and Thermodynamic Considerations, p. 1248 The Template Effect, p. 1493... [Pg.57]

Nishizawa, S. Kato. Y. Teramae. N. Fluorescence sensing of anions via intramolecular excimer formation in a pyrophosphate-induced self-assembly of a pyrene-functionalized guanidinium receptor. J. Am. Chem. Soc. 1999. 121 (40). 9463-9464. [Pg.571]

Hamilton. A.D. Fluorescent Sensing of Anions. In Encyclopedia of Supramolecular Chemistry, Atwood, J.L., Steed. J.W., Eds. Dekker, 2002. [Pg.578]

Anion-Directed Assembly, p. 51 Biosensors p. 115 Crown Ethers, p. 326 Electrochemical Sensors, p. 505 Fluorescence Sensing cf Anions, p. 566 Fluorescent Sensors, p. 572 Guanidium-Based Anion Receptors, p. 615 Hydrogen Bonding, p. 658... [Pg.751]

Biosensors, p. 115 DNA Nanotechnology, p. 475 Fluorescence Sensing of Anions, p. 566 Fluorescent Sensors, p. 572 Imaging and Targeting, p. 687 Luminescent Materials, p. 875 Photochemical Sensors, p. 1053 Supramolecular Photnchernistn, p. 1434... [Pg.829]

Fluorescence Sensing of Anions, p. 566 Fluorescent Sensors, p. 572 Luminescent Probes, p. 821... [Pg.1059]

Wallace, K. J., Belcher, W. J., Turner, D. R., Syed, K. F. and Steed, J. W., Slow anion exchange, conformational equilibria and fluorescent sensing in Venus flytrap aminopyridinium-based anion hosts, . Am. Chem. Soc., 2003,125,9699-9715. [Pg.105]

Glucose Sensing Across the Visible Spectrum with and Anionic Fluorescent Etyes... [Pg.147]

Figure 5.26 Synergistic effects in AIDA proposed mechanism for sensing neutral and anionic dioi-containing analytes based on a BBV receptor and the anionic fluorescent dye HPTS. Figure 5.26 Synergistic effects in AIDA proposed mechanism for sensing neutral and anionic dioi-containing analytes based on a BBV receptor and the anionic fluorescent dye HPTS.

See other pages where Anions fluorescence sensing is mentioned: [Pg.569]    [Pg.569]    [Pg.196]    [Pg.294]    [Pg.272]    [Pg.766]    [Pg.313]    [Pg.81]    [Pg.121]    [Pg.733]    [Pg.46]    [Pg.566]    [Pg.567]    [Pg.568]    [Pg.569]    [Pg.570]    [Pg.570]    [Pg.570]    [Pg.571]    [Pg.574]    [Pg.899]    [Pg.1012]    [Pg.136]    [Pg.166]    [Pg.182]    [Pg.282]    [Pg.20]    [Pg.287]    [Pg.830]    [Pg.236]    [Pg.32]    [Pg.315]   
See also in sourсe #XX -- [ Pg.566 , Pg.571 ]




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