Fluorescence Quenching of Aminodiphenylamines with Chloromethanes

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Title:Fluorescence Quenching of Aminodiphenylamines with Chloromethanes
Creators:
Radha, Nachiappan
Swaminathan, Meenakshisundaram
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 67, 8, pp. 1154-1164
Uncontrolled Keywords:Quenchers, Fluorescence quenching, Solvent effects, Chloromethanes, Dynamic quenching, Non-emissive exciplex, Fluorescence spectroscopy, Aminodiphenylamines

Abstract

The fluorescence quenching of 2-aminodiphenylamine (2ADPA), 4-aminodiphenylamine (4ADPA) and 4,4'-diaminodiphenylamine (DADPA) with tetrachloromethane, chloroform and dichloromethane have been studied in hexane, dioxane, acetonitrile and methanol as solvents. The quenching rate constants for the process have also been obtained by measuring the lifetimes of the fluorophores. The quenching was found to be dynamic in all cases. For 2ADPA and 4ADPA, the quenching rate constants of CCl<sub>4</sub> and CHCl<sub>3</sub> depend on the viscosity, whereas in the case of CH<sub>2</sub>Cl<sub>2</sub>, <i>k</i><sub>q</sub> depends on polarity. The quenching rate constants for DADPA with CCl<sub>4</sub> are viscosity-dependent but the quenching with CHCl<sub>3</sub> and CH<sub>2</sub>Cl<sub>2</sub> depends on the polarity of the solvents. From the results, the quenching mechanism is explained by the formation of a non-emissive complex involving a charge-transfer interaction between the electronically excited fluorophores and ground-state chloromethanes. <p>

Title:Fluorescence Quenching of Aminodiphenylamines with Chloromethanes
Creators:
Radha, Nachiappan
Swaminathan, Meenakshisundaram
Uncontrolled Keywords:Quenchers, Fluorescence quenching, Solvent effects, Chloromethanes, Dynamic quenching, Non-emissive exciplex, Fluorescence spectroscopy, Aminodiphenylamines
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:67
Number:8
Page Range:pp. 1154-1164
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc20021154UNSPECIFIED
ID Code:1979
Item Type:Article
Deposited On:06 Feb 2009 17:14
Last Modified:06 Feb 2009 16:14

Citation

Radha, Nachiappan; Swaminathan, Meenakshisundaram (2002) Fluorescence Quenching of Aminodiphenylamines with Chloromethanes. Collection of Czechoslovak Chemical Communications, 67 (8). pp. 1154-1164. ISSN 0010-0765

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