Synthesis and characterization of heteroleptic Cr(diimine)33+ complexes

Barker, Kylie D.; Barnett, Kristin A.; Connell, Stuart M.; Glaeser, Jeff W.; Wallace, Amy Jo; Wildsmith, Justin; Herbert, Brad J.; Wheeler, John F.; Kane-Maguire, Noel A. P.

doi:10.1016/s0020-1693(01)00377-2

Cited by 53 publications

(68 citation statements)

References 38 publications

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“…The chromium complex was synthesized as previously reported [23][24][25]. The stock solutions were prepared in a phosphate buffer solution (0.01 M NaH 2 PO 4 , 0.1 M NaCl, pH 7.40 ± 0.01) and the concentrations of the complex's solutions were calculated using molar absorptivity values of 4200 M −1 cm −1 at 354 nm.…”

Section: Methodsmentioning

confidence: 99%

Binding of [Cr(phen)3]3+ to transferrin at extracellular and endosomal pHs: Potential application in photodynamic therapy

García¹,

Toneatto²,

Silvero³

et al. 2014

Biochimica et Biophysica Acta (BBA) - General Subjects

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Section: Methodsmentioning

confidence: 99%

Binding of [Cr(phen)3]3+ to transferrin at extracellular and endosomal pHs: Potential application in photodynamic therapy

García¹,

Toneatto²,

Silvero³

et al. 2014

Biochimica et Biophysica Acta (BBA) - General Subjects

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“…[24][25][26][27] More recently, chromium(III) complexes have also received attention, as these complexes (in which the central metal ion has a d3 configuration) exhibit long-lived, spectrally narrow room temperature phosphorescence and have strong excited state oxidizing power. [28][29] They are also water soluble and relatively non-labile, properties conducive to their application in biological systems. It should be emphasised that in contrast to the MLCT state of the analogous ruthenium complexes 26,[30][31] the lowest excited state of the [Cr(phen) 2 (X 2 dppz)] 3+ is metalcentred and luminescent in aqueous solution.…”

Section: Introductionmentioning

confidence: 99%

Excited state behaviour of substituted dipyridophenazine Cr(iii) complexes in the presence of nucleic acids

Wojdyła

Smith

Vasudevan

et al. 2010

Photochem Photobiol Sci

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The photophysics and photochemistry of [Cr(phen) 2 (dppz)] 3+ and its 11,12-substituted derivatives [Cr(phen) 2 (X 2 dppz)] 3+ {X = Me or F} have been studied in the presence of purine nucleotides or DNA using steady state and time-resolved absorption and luminescence spectroscopy. 5′-Adenosine monophosphate (5′-AMP) shows only a weak interaction with the excited states of each complex. By contrast they are efficiently quenched by 5′-guanosine monophosphate (5′-GMP), consistent with photo-induced electron transfer. Laser flash photolysis spectroscopy in the presence of 5′-GMP suggests that both forward and back electron-transfers are rapid. All complexes also display a strong affinity for DNA and evidence for both static and dynamic quenching mechanisms is provided.Graphical Abstract:

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“…Although the complexes [Cr(bpy) 3 ] 3+ (bpy = 2,2'-bipyridine) and [Cr(phen) 3 ] 3+ (phen = 1,10-phenanthroline) are well known [4], synthetic and structural studies of heteroleptic complexes remain sparse [5,6,7,8] [10]. These are easily replaced by the second ligand N'^N' [11]. We have recently shown that an analogous approach can be applied for the preparation of heteroleptic [Cr(tpy)(tpy')] 3+ complexes [3], which, like the heteroleptic diimine systems, are rather underexplored.…”

Section: Introductionmentioning

confidence: 99%

“…We have recently shown that an analogous approach can be applied for the preparation of heteroleptic [Cr(tpy)(tpy')] 3+ complexes [3], which, like the heteroleptic diimine systems, are rather underexplored. The use of the triflate intermediate proves to be key to gaining heteroleptic chromium(III) complexes containing either tris(diimine) or bis(tpy) metal-binding domains, and in the former case, gives a route which is free of redistribution reactions involving the diimine ligands [11]. The method is preferred over routes involving perchlorates [6].…”

Section: Introductionmentioning

confidence: 99%