Electrochemical probing of ground state electronic interactions in polynuclear complexes of a new heteroditopic ligand

Dalton Transactions : an International Journal of Inorganic Chemistry
Edwin C ConstableYves C Zimmermann

Abstract

The synthesis and electronic properties of dinuclear ([(bipy)2Ru(I)M(terpy)][PF6]4(bipy = 2,2'-bipyridine, terpy = 2,2':6',2''-terpyridine; M = Ru, Os)) and trinuclear ([[(bipy)2Ru(I)]2M][PF6]6 M = Ru, Os, Fe, Co) complexes bridged by 4'-(2,2'-bipyridin-4-yl)-2,2':6',2''-terpyridine (I) have been investigated and are compared with those of mononuclear model complexes. The electrochemical analysis using cyclic voltammetry and differential pulse voltammetry reveals that there are no interactions in the ground state between adjacent metal centres. However, there is strong electronic communication between the 2,2'-bipyridine and 2,2':6',2''-terpyridine components of the bridging ligand. This conclusion is supported by a step-by-step reduction of the dinuclear and trinuclear complexes and the assignment of each electrochemical process to localised ligand sites within the didentate and terdentate domains. The investigation of the electronic absorption and emission spectra reveals an energy transfer in the excited state from the terminating bipy-bound metal centres to the central terpy-bound metal centre. This indicates that the bridge is able to facilitate energy transfer in the excited state between the metal centres despite the lac...Continue Reading

Citations

Nov 2, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Manoranjan BarSujoy Baitalik
Aug 22, 2012·Chemistry : a European Journal·Anthony SchultzGeorge R Newkome
May 15, 2009·Dalton Transactions : an International Journal of Inorganic Chemistry·Victoria L Whittle, J A Gareth Williams
Sep 23, 2009·Dalton Transactions : an International Journal of Inorganic Chemistry·Shiguo SunLicheng Sun
Apr 28, 2010·Dalton Transactions : an International Journal of Inorganic Chemistry·Shiguo SunXiaojun Peng
Aug 18, 2010·Dalton Transactions : an International Journal of Inorganic Chemistry·Shiguo SunXiaojun Peng
Aug 12, 2005·Dalton Transactions : an International Journal of Inorganic Chemistry·Anthony HarrimanRaymond Ziessel
Nov 29, 2005·Dalton Transactions : an International Journal of Inorganic Chemistry·Ramin Zibaseresht, Richard M Hartshorn
May 5, 2006·Dalton Transactions : an International Journal of Inorganic Chemistry·Kathryn J Arm, J A Gareth Williams
Apr 30, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Rajaa FarranJérôme Chauvin
Dec 11, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Andreas WinterUlrich S Schubert
Mar 7, 2006·Dalton Transactions : an International Journal of Inorganic Chemistry·Sascha OttOlof Johansson
Nov 22, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Dinesh MaitySujoy Baitalik
Jan 25, 2008·Dalton Transactions : an International Journal of Inorganic Chemistry·Jean LombardAlain Deronzier
Sep 5, 2012·Dalton Transactions : an International Journal of Inorganic Chemistry·Shiguo SunXiaojun Peng

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