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).
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 RuII : CuII. 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.
","abstract_html":"<p>The quenching of the [Ru(bipy)<sub>3</sub>]<sup>2+</sup> by Cu<sub>2</sub>L<sup>2+</sup> 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 Cu<sub>2</sub>L<sup>2+</sup>: [Ru(bipy)<sub>3</sub>]<sup>2+</sup> molar ratio. Quenching above the 0.5 Cu<sub>2</sub>L<sup>2+</sup>: [Ru(bipy)<sub>3</sub>]<sup>2+</sup> molar ratio was slower (330 x 10<sup>-6</sup> M<sup>-1</sup>s<sup>-1</sup>) than the quenching rate reaction below 0.5 ratio (387 x 10<sup>-6</sup> M<sup>-1</sup>s<sup>-1</sup>).</p><p>With Cu<sub>2</sub>L<sup>2+</sup> being a dimeric complex the break and differences in the quenching reaction rates can be explained in terms of the stoichiometry. When the Cu<sub>2</sub>L<sup>2+</sup>: [Ru(bipy)<sub>3</sub>]<sup>2+</sup> ratio is < 0.5, then each [Ru(bipy)<sub>3</sub>]<sup>2+</sup> can interact with 1 Cu<sub>2</sub>L<sup>2+</sup> dimer. At 0.5 then there is exactly a 1:1 ratio Ru<sup>II</sup> : Cu<sup>II</sup>. Above the 0.5 ratio the [Ru(bipy)<sub>3</sub>]<sup>2+</sup> can interact with maybe only one of the Cu<sub>2</sub>L<sup>2+</sup>'s in the dimer, or with a [Ru(bipy)<sub>3</sub>]<sup>2+</sup>: Cu<sub>2</sub>L<sup>2+</sup> unit, so the quenching is less efficient.</p>","abstract_has_math":false,"creators":["Cummins, Kevin E."],"institution":null,"degree_name":"MS (Master of Science)","degree_level":"Thesis - unrestricted","degree_discipline":"Chemistry","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-08-17T07:00:00Z","date_published":"2011-08-17T07:00:00Z","updated_at":"2026-07-24T02:20:14Z","subjects":["Fluorescence","Dimeric Copper(II)","[Ru(bipy)3]2+","Ruthenium","Quenching","Chemistry","Inorganic Chemistry","Physical Sciences and Mathematics"],"languages":[],"rights":["Copyright by the authors."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://dc.etsu.edu/etd/1347","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Cummins, Kevin E."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.available","label":"Dc Date Available","values":["1990-01-01T08:00:00Z"]},{"key":"dc:date.issued","label":"Date","values":["2011-08-17T07:00:00Z"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Chemistry"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis - unrestricted"]},{"key":"thesis:degree_name","label":"Degree Name","values":["MS (Master of Science)"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Fluorescence","Dimeric Copper(II)","[Ru(bipy)3]2+","Ruthenium","Quenching","Chemistry","Inorganic Chemistry","Physical Sciences and Mathematics"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:rights","label":"Dc Rights","values":["Copyright by the authors."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://dc.etsu.edu/context/etd/article/2538/viewcontent/CumminsK072711f.pdf","https://dc.etsu.edu/etd/1347"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["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).
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 RuII : CuII. 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.
"]},{"key":"dc:title","label":"Title","values":["Quenching of the Fluorescence of Tris (2 2-Bipyridine) Ruthenium(II) [Ru(bipy)3]2+ by a Dimeric Copper(II) Complex."]}]}],"canonical_facts":{"dc:creator":["Cummins, Kevin E."],"dc:date.available":["1990-01-01T08:00:00Z"],"dc:date.issued":["2011-08-17T07:00:00Z"],"dc:description.abstract":["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).
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 RuII : CuII. 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.
"],"dc:identifier":["https://dc.etsu.edu/context/etd/article/2538/viewcontent/CumminsK072711f.pdf","https://dc.etsu.edu/etd/1347"],"dc:rights":["Copyright by the authors."],"dc:subject":["Fluorescence","Dimeric Copper(II)","[Ru(bipy)3]2+","Ruthenium","Quenching","Chemistry","Inorganic Chemistry","Physical Sciences and Mathematics"],"dc:title":["Quenching of the Fluorescence of Tris (2 2-Bipyridine) Ruthenium(II) [Ru(bipy)3]2+ by a Dimeric Copper(II) Complex."],"thesis:degree_discipline":["Chemistry"],"thesis:degree_level":["Thesis - unrestricted"],"thesis:degree_name":["MS (Master of Science)"]},"updated_at":"2026-07-24T02:20:14Z"}