Metal–metal communication in diruthenium complexes of the bridging ligand bis(imidazo[4,5-f][1,10]phenanthroline)

Srinivasan, Padmini; Mason, R. H.; MacNeil, J.R.G.; MacLean, Brian J.

doi:10.1016/j.ica.2010.10.016

Cited by 7 publications

(3 citation statements)

References 21 publications

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“…The other materials were purchased commercially and used without further purification. The complex [Ru 2 (bpy) 4 (H 2 bipt)]-Cl 4 1Cl 4 {bpy = 2,2′-bipyridine, H 2 bipt = 2,5-bis[1,10]phenanthrolin[4,5-f ]-imidazol-2-yl)thiophene} was prepared by a modified literature procedure described by Srinivasan, 27 and the synthetic route (see Scheme S1 †) and synthetic details are given in the ESI. † The molecular structure of [Ru 2 (bpy) 4 (H 2 bipt)] 2+ 1 along with those of some representative Ru II complexes 2-31 are shown in Scheme 1.…”

Section: Introductionmentioning

confidence: 99%

pH luminescence switch, DNA binding and photocleavage, and cytotoxicity of a dinuclear ruthenium complex

Zhao

Zheng

et al. 2013

Dalton Trans.

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The ground- and excited-state acid-base properties of [Ru2(bpy)4(H2bipt)]Cl4 1 {bpy = 2,2'-bipyridine, H2bipt = 2,5-bis[1,10]phenanthrolin[4,5-f]-imidazol-2-yl)thiophene} are investigated by emission and UV-visible absorption spectrophotometric pH titrations. The DNA binding properties of 1 are studied by means of DNA viscosity and optical spectroscopic techniques of UV-visible absorption and emission spectral titrations, steady-state emission quenching with ferrocyanide, ethidium bromide competitive binding, and DNA thermal denaturation as well as density functional theoretical calculations. The DNA photocleavage and singlet oxygen generation properties as well as in vitro anticancer activities against five cancer cell lines are studied as well. The results demonstrated that pH-induced luminescence switching, DNA binding, and anticancer properties of 1 are much improved with respect to those of the mononuclear analog [Ru(bpy)2(Htip)]Cl2 {Htip = 2-(thiophen-2-yl)-1H-imidazo[4,5-f][1,10]phenanthroline}.

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Section: Introductionmentioning

confidence: 99%

pH luminescence switch, DNA binding and photocleavage, and cytotoxicity of a dinuclear ruthenium complex

Zhao

Zheng

et al. 2013

Dalton Trans.

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“…For instance, 925 has been condensed on 914 , leading to heteroditopic linear ligand 926 . The conditions are, however, generally very harsh, employing polyphosphoric acid at high temperatures, − sometimes for long reaction time ( e.g. , days).…”

Section: Divergent Synthesis Pathwaysmentioning

confidence: 99%

Fifty Shades of Phenanthroline: Synthesis Strategies to Functionalize 1,10-Phenanthroline in All Positions

Queffélec,

Pati,

Pellegrin

2024

Chem. Rev.

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1,10-Phenanthroline (phen) is one of the most popular ligands ever used in coordination chemistry due to its strong affinity for a wide range of metals with various oxidation states. Its polyaromatic structure provides robustness and rigidity, leading to intriguing features in numerous fields (luminescent coordination scaffolds, catalysis, supramolecular chemistry, sensors, theranostics, etc.). Importantly, phen offers eight distinct positions for functional groups to be attached, showcasing remarkable versatility for such a simple ligand. As a result, phen has become a landmark molecule for coordination chemists, serving as a must-use ligand and a versatile platform for designing polyfunctional arrays. The extensive use of substituted phenanthroline ligands with different metal ions has resulted in a diverse array of complexes tailored for numerous applications. For instance, these complexes have been utilized as sensitizers in dye-sensitized solar cells, as luminescent probes modified with antibodies for biomaterials, and in the creation of elegant supramolecular architectures like rotaxanes and catenanes, exemplified by Sauvage’s Nobel Prize-winning work in 2016. In summary, phen has found applications in almost every facet of chemistry. An intriguing aspect of phen is the specific reactivity of each pair of carbon atoms ([2,9], [3,8], [4,7], and [5,6]), enabling the functionalization of each pair with different groups and leading to polyfunctional arrays. Furthermore, it is possible to differentiate each position in these pairs, resulting in non-symmetrical systems with tremendous versatility. In this Review, the authors aim to compile and categorize existing synthetic strategies for the stepwise polyfunctionalization of phen in various positions. This comprehensive toolbox will aid coordination chemists in designing virtually any polyfunctional ligand. The survey will encompass seminal work from the 1950s to the present day. The scope of the Review will be limited to 1,10-phenanthroline, excluding ligands with more intracyclic heteroatoms or fused aromatic cycles. Overall, the primary goal of this Review is to highlight both old and recent synthetic strategies that find applicability in the mentioned applications. By doing so, the authors hope to establish a first reference for phenanthroline synthesis, covering all possible positions on the backbone, and hope to inspire all concerned chemists to devise new strategies that have not yet been explored.

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“…However, reports on Ru complexes with fmp/bpy or fmp/phen and H 2 bpib/phen or H 2 bpib/bpy ligands are available. [19][20][21] It is inappropriate to compare the reported Ir and the Ru complexes of the present case because ppy acts as a cyclometalating ligand in our Ir complexes, whereas bpy/phen has been used for the Ru complexes. However, an overall comparison of their properties can be made.…”

Section: Introductionmentioning

confidence: 99%

Efficiency of photoinduced electron transfer in mono- and di-nuclear iridium complexes: a comparative study

2017

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Metal–metal communication in diruthenium complexes of the bridging ligand bis(imidazo[4,5-f][1,10]phenanthroline)

Cited by 7 publications

References 21 publications

pH luminescence switch, DNA binding and photocleavage, and cytotoxicity of a dinuclear ruthenium complex

pH luminescence switch, DNA binding and photocleavage, and cytotoxicity of a dinuclear ruthenium complex

Fifty Shades of Phenanthroline: Synthesis Strategies to Functionalize 1,10-Phenanthroline in All Positions

Efficiency of photoinduced electron transfer in mono- and di-nuclear iridium complexes: a comparative study

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