Evidence of a Photoinduced Electron-Transfer Mechanism in the Fluorescence Self-quenching of 2,5-Substituted Selenophenes Prepared through In Situ Reduction of Elemental Selenium in Superbasic Media

2021 ◽  
Author(s):  
Helena Domingues de Salles ◽  
Felipe Lange Coelho ◽  
Douglas Bernardo Paixão ◽  
Cristina Aparecida Barboza ◽  
Daniel da Silveira Rampon ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
Transfer Mechanism ◽  
Elemental Selenium ◽  
In Situ Reduction ◽  
Electron Transfer Mechanism ◽  
Superbasic Media

Novel anthracene- and pyridine-containing Schiff base probe for selective “off–on” fluorescent determination of Cu2+ ions towards live cell application

2016 ◽  
Vol 40 (7) ◽  
pp. 6101-6108 ◽  
Author(s):  
Turibius Simon ◽  
Muthaiah Shellaiah ◽  
Venkatesan Srinivasadesikan ◽  
Ching-Chang Lin ◽  
Fu-Hsiang Ko ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Schiff Base ◽  
Photoinduced Electron Transfer ◽  
Transfer Mechanism ◽  
Live Cell ◽  
Live Cells ◽  
Electron Transfer Mechanism

A simple anthracene-based AP probe was synthesized to detect Cu2+ ions, via the photoinduced electron transfer mechanism, in live cells.

Rational design of a boron-dipyrromethene-based fluorescent probe for detecting Pd2+ sensitively and selectively in aqueous media

The Analyst ◽  
2019 ◽  
Vol 144 (4) ◽  
pp. 1260-1264 ◽  
Author(s):  
Yannan Li ◽  
Li Yang ◽  
Mengqi Du ◽  
Guanjun Chang
Keyword(s):  
Electron Transfer ◽  
Fluorescent Probe ◽  
Photoinduced Electron Transfer ◽  
Rational Design ◽  
Aqueous Media ◽  
Transfer Mechanism ◽  
Electron Transfer Mechanism ◽  
Boron Dipyrromethene

A novel fluorescent probe for Pd2+ based on the BODIPY fluorophore exploiting the PET (Photoinduced Electron Transfer) mechanism was designed and successfully synthesized.

Article

1999 ◽  
Vol 77 (10) ◽  
pp. 1655-1670 ◽  
Author(s):  
Dino Mangion ◽  
Donald R Arnold
Keyword(s):  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
Photochemical Reactions ◽  
Transfer Mechanism ◽  
Radical Ions ◽  
Reaction Conditions ◽  
Electron Transfer Mechanism ◽  
Photochemical Reactivity ◽  
Bond Homolysis

The photochemical reactivity of a series of 4-halobenzonitriles and 4-haloanisoles with 1,1-diphenylethene in a nucleophilic solvent (methanol) has been investigated. Analysis of the photochemical reactions involving the 4-halobenzonitriles revealed formation of alkene-methanol adducts, such as 1-methoxy-2,2-diphenylethane, 1-methoxy-2,2-diphenylethene, and 1,1-dimethoxy-2,2-diphenylethane, indicative of a photochemical electron-transfer mechanism. These products were not significant in the photochemical reactions involving the 4-haloanisoles. Both the 4-halobenzonitriles and the 4-haloanisoles produced an arene-alkene-methanol Markovnikov adduct, 1-aryl-2-methoxy-2,2-diphenylethane (aryl = 4-cyanophenyl or 4-methoxyphenyl). This compound was shown to undergo an acid-catalysed elimination to 1-aryl-2,2-diphenylethene under the reaction conditions, which subsequently underwent a 6pi-electrocyclization to the 3-substituted(cyano or methoxy)-9-phenylphenanthrene. Possible mechanisms for the observed reactivity are discussed and evaluated.Key words: photochemistry, photoinduced electron transfer, bond homolysis, radical ions, radicals, exciplexes.

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