Dynamic fluorescence quenching of quinine sulfate dication by chloride ion in ionic and neutral micellar environments

2014 ◽  
Author(s):  
Sunita Joshi ◽  
Tej Varma Varma Y ◽  
Debi D. Pant
Keyword(s):  
Fluorescence Quenching ◽  
Chloride Ion ◽  
Quinine Sulfate ◽  
Dynamic Fluorescence

scholarly journals Substrate-Based Near-Infrared Imaging Sensors Enable Fluorescence Lifetime Contrast via Built-in Dynamic Fluorescence Quenching Elements

ACS Sensors ◽  
2016 ◽  
Vol 1 (4) ◽  
pp. 427-436 ◽  
Author(s):  
Anand T. N. Kumar ◽  
William L. Rice ◽  
Jessica C. López ◽  
Suresh Gupta ◽  
Craig J. Goergen ◽  
...  
Keyword(s):  
Fluorescence Quenching ◽  
Fluorescence Lifetime ◽  
Near Infrared ◽  
Infrared Imaging ◽  
Near Infrared Imaging ◽  
Imaging Sensors ◽  
Dynamic Fluorescence

MODELING THE CONCENTRATIONS AND EFFICIENCIES FOR THE INTERACTING SPECIES OF PYROPHEOPHORBIDE METHYL ESTER-COPPER ASSOCIATION

2013 ◽  
Vol 08 (01n02) ◽  
pp. 73-87 ◽  
Author(s):  
S. AL-OMARI
Keyword(s):  
Methyl Ester ◽  
Fluorescence Quenching ◽  
Binding Site ◽  
Binding Constant ◽  
Pharmacokinetics And Pharmacodynamics ◽  
Dynamic Binding ◽  
Binding Interaction ◽  
Interacting Species ◽  
Different Temperatures ◽  
Dynamic Fluorescence

The interaction between pyropheophorbide methyl ester (PPME) and Cu 2+ was investigated using UV-vis and fluorescence spectrscopy. Study of the binding interaction between PPME and Cu 2+ could contribute to understanding of its pharmacokinetics and pharmacodynamics. Parameters of the static and dynamic fluorescence quenching of PPME- Cu 2+ association were calculated at different temperatures. For binding site of 1:1 at 299 K, the static binding constant (kS), the static isosbestic concentration ([Formula: see text]), the dynamic binding constant (kD), and the dynamic isosbestic concentration ([Formula: see text]) are, respectively, 61 M-1, 0.0164 M, 75 M-1, and 0.0133 M. The concentrations and efficiencies of the intermediates species were modeled. Satisfactory correspondence between the experimental and calculated results was found.

Dynamic fluorescence quenching by 2,4,6-trinitrophenol in the voids of an aggregation induced emission based fluorescent probe

2017 ◽  
Vol 41 (17) ◽  
pp. 8739-8747 ◽  
Author(s):  
Neetu Tripathi ◽  
Prabhpreet Singh ◽  
Subodh Kumar
Keyword(s):  
Fluorescence Quenching ◽  
Fluorescent Probe ◽  
Linear Change ◽  
Aggregation Induced Emission ◽  
Dynamic Fluorescence

PY-DNSfollows dynamic fluorescence quenching with TNP to elicit a linear change in fluorescence quenching over eight orders of concentration of TNP (10−13–10−5M).

Study of a Polymeric Network by Dynamic Fluorescence Quenching Using a Blob Model

1999 ◽  
Vol 32 (9) ◽  
pp. 2845-2854 ◽  
Author(s):  
Veena Vangani ◽  
Jean Duhamel ◽  
Sandor Nemeth ◽  
Tze-Chi Jao
Keyword(s):  
Fluorescence Quenching ◽  
Polymeric Network ◽  
Blob Model ◽  
Dynamic Fluorescence

scholarly journals The role of polymer flexibility on the interaction with surfactant micelles: poly(vinyl alcohol) and sodium dodecyl sulphate aqueous micelle interactions studied by dynamic fluorescence quenching

1995 ◽  
Vol 73 (11) ◽  
pp. 1765-1772 ◽  
Author(s):  
Jan. Van Stam ◽  
Nadine. Wittouck ◽  
Frans C. De Schryver ◽  
Mats Almgren ◽  
Maria da Graça Miguel
Keyword(s):  
Fluorescence Quenching ◽  
Sodium Dodecyl Sulphate ◽  
Vinyl Alcohol ◽  
Surfactant Concentration ◽  
Sodium Dodecyl ◽  
Critical Aggregation Concentration ◽  
Poly Vinyl Alcohol ◽  
Fluorescence Measurements ◽  
Aggregation Numbers ◽  
Dynamic Fluorescence

The interactions between poly(vinyl alcohol) and the surfactant sodium dodecyl sulphate in aqueous solutions have been investigated by means of static and dynamic fluorescence measurements. By static fluorescence measurements the onset of interaction, the critical aggregation concentration, is determined to be 6.5 mM at 20 °C and 7.0 mM at 40 °C. By dynamic fluorescence measurements without added quencher the influence on the lifetime of the fluorescent probe, pyrene, by the presence of the polymer is investigated. From measurements with an added quencher, dimethylbenzophenone, the surfactant aggregation numbers of the micellar aggregates formed upon interaction between the surfactant and the polymer and the quenching rate constant are obtained. At the two polymer concentrations, i.e., 0.2% and 2.0%, the surfactant aggregation numbers at low surfactant concentration are very small, but increase rapidly with increasing surfactant concentration. Comparisons are made with results from a system where poly(ethylene oxide) instead of poly(vinyl alcohol) is the polymer. Key words: dynamic fluorescence quenching, polymer–surfactant interactions, aggregation numbers.

scholarly journals Dual “Static and Dynamic” Fluorescence Quenching Mechanisms Based Detection of TNT via a Cationic Conjugated Polymer

2021 ◽  
Author(s):  
Arvin Sain Tanwar ◽  
Retwik Parui ◽  
Rabindranath Garai ◽  
Moirangthem Anita Chanu ◽  
Parameswar Krishnan Iyer
Keyword(s):  
Fluorescence Quenching ◽  
Conjugated Polymer ◽  
Quenching Mechanisms ◽  
Dynamic Fluorescence

Dynamic fluorescence quenching precedent to thermally-induced phase separation of poly(ethoxyethyl vinyl ether) aqueous solution

1999 ◽  
Vol 42 (1) ◽  
pp. 85-91 ◽  
Author(s):  
Jun-ichi Horinaka ◽  
Yasuo Matsumura ◽  
Masahide Yamamoto ◽  
Sadahito Aoshima ◽  
Eiichi Kobayashi
Keyword(s):  
Aqueous Solution ◽  
Phase Separation ◽  
Fluorescence Quenching ◽  
Vinyl Ether ◽  
Thermally Induced Phase Separation ◽  
Thermally Induced ◽  
Dynamic Fluorescence
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