Quenching of the Fluorescence of Tris (2 2-Bipyridine) Ruthenium(II) [Ru(bipy)3]2+ by a Dimeric Copper(II) Complex.

<p>The quenching of the [Ru(bipy)₃]²⁺ by Cu₂L²⁺ was studied and the data were plotted with the Stern-Volmer equation. The plot showed a break and was divided into 2 regions, <0.5 and >0.5 Cu₂L²⁺: [Ru(bipy)₃]²⁺ molar ratio. Quenching above the 0.5 Cu₂L²⁺: [Ru(bipy)₃]²⁺ molar ratio was slower (330 x 10^-6 M^-1s^-1) than the quenching rate reaction below 0.5 ratio (387 x 10^-6 M^-1s^-1).</p><p>With Cu₂L²⁺ being a dimeric complex the break and differences in the quenching reaction rates can be explained in terms of the stoichiometry. When the Cu₂L²⁺: [Ru(bipy)₃]²⁺ ratio is < 0.5, then each [Ru(bipy)₃]²⁺ can interact with 1 Cu₂L²⁺ dimer. At 0.5 then there is exactly a 1:1 ratio Ru^II : Cu^II. Above the 0.5 ratio the [Ru(bipy)₃]²⁺ can interact with maybe only one of the Cu₂L²⁺'s in the dimer, or with a [Ru(bipy)₃]²⁺: Cu₂L²⁺ unit, so the quenching is less efficient.</p>

Name thesis:degree_name

MS (Master of Science)

Level thesis:degree_level

Thesis - unrestricted

Discipline thesis:degree_discipline

Chemistry

Year dc:date.issued

2011

Author dc:creator

• Cummins, Kevin E.

• Fluorescence
• Dimeric Copper(II)
• [Ru(bipy)3]2+
• Ruthenium
• Quenching
• Chemistry
• Inorganic Chemistry
• Physical Sciences and Mathematics

Statement dc:rights

• Copyright by the authors.

Repository record dc:identifier

https://dc.etsu.edu/etd/1347

OAI identifier oai:identifier

oai:dc.etsu.edu:etd-2538