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<p><strong>Luminescence quenching of tris (4,4’- dimethyl- 2,2’-bipyridyl) ruthenium (II) complex with quinones in aprotic polar medium.</strong></p>

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Title Statement <p><strong>Luminescence quenching of tris (4,4’- dimethyl- 2,2’-bipyridyl) ruthenium (II) complex with quinones in aprotic polar medium.</strong></p>
 
Added Entry - Uncontrolled Name Sumitha Celin, Thangadurai ; Scott Christian College(Autonomous),Nagercoil,Tamilnadu.
GNANA RAJ, ALLEN ; Scott Christian College(Autonomous),Nagercoil,Tamilnadu.
 
Uncontrolled Index Term inorganic Chemistry;Photochemistry
Quinones, luminescence, Stern- Volmer equation, static quenching, transient absorption spectra
 
Summary, etc. <p>The photoredox reactions of biologically important quinones with the excited state [Ru(dmbpy)<sub>3</sub>]<sup>2+</sup> (dmbpy = 4,4’ - dimethyl -2,2’- bipyridine ) complex proceed through photoinduced electron transfer reaction in DMF and have  been studied by luminescence quenching technique. The complex shows absorption and emission maximum at 458 nm and 608 nm.  It shows a lifetime of 164 ns in DMF.  The dynamic or static nature of the quenching is confirmed from the ground state absorption studies. The oxidative quenching of [Ru(dmbpy)<sub>3</sub>]<sup>2+</sup> complex by quinones is confirmed from the transient absorption spectra and also from the linearity of  the Stern - Volmer plot. The quenching rate constant (<em>k</em><sub>q</sub>) is highly sensitive to the nature of the ligand, the free energy change (DG<sup>0</sup>) of the reaction as well as the electron transfer distance. Structural effect plays an importance role in the photoinduced electron transfer reaction in DMF.</p>
 
Publication, Distribution, Etc. Indian Journal of Chemistry -Section A (IJCA)
2020-10-06 11:19:13
 
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http://op.niscair.res.in/index.php/IJCA/article/view/27678
 
Data Source Entry Indian Journal of Chemistry -Section A (IJCA); ##issue.vol## 59, ##issue.no## 7 (2020): INDIAN JOURNAL OF CHEMISTRY- SECTION A
 
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Nonspecific Relationship Entry http://op.niscair.res.in/index.php/IJCA/article/download/27678/465485419
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