Record Details

<p>Electron transfer fluorescence quenching of napthalenediols by metal ions</p>

Online Publishing @ NISCAIR

View Archive Info
 
 
Field Value
 
Authentication Code dc
 
Title Statement <p>Electron transfer fluorescence quenching of napthalenediols by metal ions</p>
 
Added Entry - Uncontrolled Name Swaminathan, M. ; Department of Chemistry, Nanomaterials laboratory, Kalasalingam University, Krishnankoil-626126 Tamil Nadu, India.
Radha, Nachiappan ; PG and Research Department of Chemistry, Alagappa Govt. Arts College, Karaikudi - 630003
 
Uncontrolled Index Term spectroscopy;analytical chemistry
Fluorescence quenching, Electron transfer quenching, Quenching, Transition metal ions, Naphthalenediols
 
Summary, etc. Fluorescence quenching of four naphthalenediols (1,5-; 1,7-; 2,7-; 2,3-NDs) by transition metal ions (Cu<sup>2+</sup>, Co<sup>2+</sup>, Ni<sup>2+</sup>, Mn<sup>2+</sup>, Zn<sup>2+</sup>, Pb<sup>2+</sup>) has been investigated in 95% water-ethanol mixture. The dynamic quenching is appreciable with all metal ions except Pb<sup>2+</sup>. Cupric ion (Cu<sup>2+</sup>) is found to be an efficient quencher with all naphthalenediols and the sensitivity of 1,7-ND fluorescence is much higher than other naphthalenediols. The quenching rate constants (<em>k</em><sub>q</sub>) have been analyzed for various possible mechanisms. A good correlation of log <em>k</em><sub>q</sub> values with the reduction potentials of metal ions reveals the electron transfer quenching mechanism via a non-emissive exciplex with electron transfer from excited fluorophore to the metal ions. The anomalous behavior of 1,7-ND is explained by its point group symmetry and polarity.
 
Publication, Distribution, Etc. Indian Journal of Chemistry -Section A (IJCA)
2020-10-19 14:04:12
 
Electronic Location and Access application/pdf
http://op.niscair.res.in/index.php/IJCA/article/view/21142
 
Data Source Entry Indian Journal of Chemistry -Section A (IJCA); ##issue.vol## 57, ##issue.no## 7 (2018): INDIAN JOURNAL OF CHEMISTRY- SECTION A
 
Language Note en
 
Nonspecific Relationship Entry http://op.niscair.res.in/index.php/IJCA/article/download/21142/465465997
http://op.niscair.res.in/index.php/IJCA/article/download/21142/465465998
http://op.niscair.res.in/index.php/IJCA/article/download/21142/465465999
http://op.niscair.res.in/index.php/IJCA/article/download/21142/465466000
http://op.niscair.res.in/index.php/IJCA/article/download/21142/465466001
http://op.niscair.res.in/index.php/IJCA/article/download/21142/465466002
http://op.niscair.res.in/index.php/IJCA/article/download/21142/465466003
 
Terms Governing Use and Reproduction Note Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India© 2015. The Council of Scientific &amp; Industrial Research, New Delhi.