Role of the LUMO in determining redox stability for 2,3-dipyridylpyrazine and 2,3-dipyridylquinoxaline-bridged ruthenium(II) bimetallic complexes

Cooper, John B.; MacQueen, David; Petersen, John D.; Wertz, D. W.

doi:10.1021/ic00344a015

Cited by 68 publications

(49 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Bis(2-pyridyl)pyrazines were used by a number of researchers in the 1990s to prepare multinuclear Ru(II) complexes [25,26,27]. They can act as bridging bis-chelating ligands that can offer N^N coordination simultaneously to two metal ions.…”

Section: Complexes In Which the Metal Ions Are Bound To A Rigid Bridging Bis-chelating Heterocyclementioning

confidence: 99%

The luminescence properties of multinuclear platinum complexes

Puttock

Walden

Williams

2018

Coordination Chemistry Reviews

132

View full text Add to dashboard Cite

The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.

show abstract

Section: Complexes In Which the Metal Ions Are Bound To A Rigid Bridging Bis-chelating Heterocyclementioning

confidence: 99%

The luminescence properties of multinuclear platinum complexes

Puttock

Walden

Williams

2018

Coordination Chemistry Reviews

132

View full text Add to dashboard Cite

show abstract

“…Such spectroelectrochemical (SEC) techniques are convenient methods for obtaining spectra and redox potentials and for observing subsequent chemical reactions of electrogenerated species [1]. SEC measurements have also been used as a powerful tool for probing the electronic transitions and electrochemical processes of transition metal complexes with polypyridyl and polyazine ligands [2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…p* transitions, which are typically seen in the visible region of the spectrum. SEC techniques have been used to elucidate various properties of ruthenium complexes with 2,2 0 -bipyridine ligands [2,[14][15][16][17][18][19]. For instance, electronic absorption SEC measurements were used to confirm electrochemical assignments of [Ru(bpy)(dpp)] 2?…”

Section: Introductionmentioning

confidence: 99%

“…and to help make assignments in the excited state electronic absorption spectra of these complexes [17]. Wertz et al [2] used electronic absorption SEC along with resonance Raman and ESR (electron spin resonance) methods to investigate the difference in the behavior of {[Ru(bpy) 2 ] 2 (l-L)} 4? (where L = dpp or 2,3-dipyridylquinoxaline (dpq)).…”

Section: Introductionmentioning

confidence: 99%

“…MacDonnell et al [16] used a combination of electronic absorption SEC, cyclic voltammetry, and differential pulse voltammetry to investigate two-electron/two-proton reduction processes in the mononuclear complex, [Ru(bpy) 2 (tatpp)]Cl 2 (where tatpp = 9,11,20,22-tetraaza-tetrapyrido[3,2-a:2 0 ,3 0 -c:3 00 ,2 00 -1:2 000 ,3 000 ]-pentacene). UV-vis SEC techniques were also applied for examination of the dissociation of the dimer [Ru(bpy)(CO) 2 Cl] 2 in DMSO electrolyte to form free chloride and a DMSO-coordinated monocation [15]. Our group has recently studied the SEC of the cyclometalated ruthenium chloro and nitrosyl complexes, [Ru(g 2 -phpy) (trpy)Cl][PF 6 ] and [Ru(g 2 -phpy)(trpy)NO][PF 6 ] 2 (where phpy is 2-phenylpyridine and trpy is 2,2 0 :6 0 ,2 00 -terpyridine) [20].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The mononuclear ruthenium(III)-2,3,5,6-tetrakis(2-pyridyl)pyrazine complex [Ru(bpy)(tppz)Cl][PF6]2: synthesis, crystal structure, electrochemical, and spectroelectrochemical studies

Daryanavard

Hadadzadeh

Khalaji

et al. 2009

Transition Met Chem

View full text Add to dashboard Cite

The mononuclear Ru(III) complex, [Ru(bpy)-(tppz)Cl][PF 6 ] 2 .acetylacetone, where tppz is 2,3,5,6-tetrakis(2-pyridyl)pyrazine and bpy is 2,2 0 -bipyridine, has been prepared and characterized by physicochemical and spectroscopic methods, cyclic voltammetry, and single crystal X-ray structure analysis. The coordination around the Ru(III) center is distorted octahedral, with bite angles of 80.70-161.83°for the chelating bpy and tppz ligands. The two pyridyl rings of the bpy ligand are nearly coplanar. UV-vis spectroelectrochemical studies of this complex in acetonitrile showed a reversible redox behavior evaluated by the maintenance of isosbestic points in the UV-vis spectrum for both forward reduction and reverse oxidation processes. Magnetic susceptibility data derived from paramagnetic NMR data revealed an effective magnetic moment of 1.79 BM at room temperature.

show abstract

Oligomeric Metal Complexes

Constable¹

1998

Electronic Materials: The Oligomer Approach

View full text Add to dashboard Cite

Transition metal centres offer an obvious way for the introduction of charge centres or charge-carrying centres into new materials. The coordination of metal centres to ligands containing two or more distinct metal-binding domains provides a phenomenological and methodological approach to the assembly of designed novel materials. The limitations of this approach are currently being probed, and this chapter will provide an overview of the area. The emphasis will be upon synthesis rather than the properties of the materials and, in particular, the controlled assembly of materials of known nuclearity and topology.In order to keep this chapter to a reasonable length, the coverage will be restricted in a number of ways. Firstly, materials which are 'truly' polymeric will only be discussed if there are good solid state structural data to support their formulation and structural integrity. Secondly, the emphasis will be placed upon systems in which the ligand predisposes the assembly towards a particular structure. This latter restriction means that little will be said about halide. oxy and hydroxy bridged systems. Furthermore, it will be assumed for the most part that the ligands involved play some r61e in the electronic communication between metal centres and 'insulating' spacers will not be discussed in detail. In particular, the design of extended molecular materials will be discussed.The methods adopted involve the use of bridging ligands containing two or more metal-binding domains. A metal-binding domain is usually readily recognized as a conventional ligand type (for example, a phosphine, carboxylate, thiolate or oligopyridine). The linking together of the domains utilises conventional organic synthetic methods. In an ideal case, simply mixing the bridging ligand with an appropriate metal source, usually, but not necessarily in homogeneous solution, results in the formation of the desired oligomeric system. This process is shown in Fig. 1 [l].It is immediately apparent that a number of features need to be carefully controlled if the desired assembly process is to occur.The stability of the desired assembly must be maximised in order to drive the system towards the correct (i.e. wanted) product. The simplest way to achieve this is by the use of multidentate chelating ligands rather than monodentate donors. For this reason, systems based upon chloride, oxy or hydroxy bridges are not covered in detail in this article, because, although they possess extremely interesting properties, it is not usually possible, n priori, to predict exactly what material, morphology and topology will be obtained.The metal-binding domain can be tailored to the desired metal centre. This may be at a gross structural level by simply matching up the number of donor atoms to

show abstract

Role of the LUMO in determining redox stability for 2,3-dipyridylpyrazine and 2,3-dipyridylquinoxaline-bridged ruthenium(II) bimetallic complexes

Cited by 68 publications

References 0 publications

The luminescence properties of multinuclear platinum complexes

The luminescence properties of multinuclear platinum complexes

The mononuclear ruthenium(III)-2,3,5,6-tetrakis(2-pyridyl)pyrazine complex [Ru(bpy)(tppz)Cl][PF6]2: synthesis, crystal structure, electrochemical, and spectroelectrochemical studies

Oligomeric Metal Complexes

Contact Info

Product

Resources

About