Ruthenium(II) bipyridine complexes bearing quinoline–azoimine (NN′N″) tridentate ligands : Synthesis, spectral characterization, electrochemical properties and single-crystal X-ray structure analysis

Al-Noaimi, Mousa; Abdel-Rahman, Obadah S.; Fasfous, Ismail I.; El-khateeb, Mohammad; Awwadi, Firas A.; Warad, Ismail

Ruthenium(II) bipyridine complexes bearing quinoline–azoimine (NN′N″) tridentate ligands : Synthesis, spectral characterization, electrochemical properties and single-crystal X-ray structure analysis

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Datum

2014

Autor:innen

Al-Noaimi, Mousa

Abdel-Rahman, Obadah S.

Fasfous, Ismail I.

El-khateeb, Mohammad

Awwadi, Firas A.

Warad, Ismail

DOI (zitierfähiger Link)

https://doi.org/10.1016/j.saa.2014.01.075

Sammlungen

Chemie

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Spectrochimica Acta Part A : Molecular and Biomolecular Spectroscopy. 2014, 125, pp. 375-383. ISSN 1386-1425. eISSN 1873-3557. Available under: doi: 10.1016/j.saa.2014.01.075

Zusammenfassung

Four octahedral ruthenium(II) azoimine–quinoline complexes having the general molecular formula RuII(Lsingle bondY)(bpy)Cl {Lsingle bondY = YC₆H₄Ndouble bond; length as m-dashNC(COCH₃)double bond; length as m-dashNC₉H₆N, Y = H (1), CH₃ (2), Br (3), NO₂ (4) and bpy = 2,2′-bipyrdine} were synthesized. The azoimine–quinoline based ligands behave as NN′N″ tridentate donors and coordinated to ruthenium via azo-N′, imine-N′ and quinolone-N″ nitrogen atoms. The composition of the complexes has been established by elemental analysis, spectral methods (FT-IR, electronic, ¹H NMR, UV/Vis and electrochemical (cyclic voltammetry) techniques. The crystal structure of complex 1 is reported. The Ru(II) oxidation state is greatly stabilized by the novel tridentate ligands, showing Ru(III/II) couples ranging from 0.93–1.27 V vs. Cp₂Fe/Cp₂Fe⁺. The absorption spectrum of 1 in dichloromethane was modeled by time-dependent density functional theory (TD-DFT).

Fachgebiet (DDC)

540 Chemie

Zitieren

ISO 690

AL-NOAIMI, Mousa, Obadah S. ABDEL-RAHMAN, Ismail I. FASFOUS, Mohammad EL-KHATEEB, Firas A. AWWADI, Ismail WARAD, 2014. Ruthenium(II) bipyridine complexes bearing quinoline–azoimine (NN′N″) tridentate ligands : Synthesis, spectral characterization, electrochemical properties and single-crystal X-ray structure analysis. In: Spectrochimica Acta Part A : Molecular and Biomolecular Spectroscopy. 2014, 125, pp. 375-383. ISSN 1386-1425. eISSN 1873-3557. Available under: doi: 10.1016/j.saa.2014.01.075

BibTex

@article{AlNoaimi2014Ruthe-30426,
  year={2014},
  doi={10.1016/j.saa.2014.01.075},
  title={Ruthenium(II) bipyridine complexes bearing quinoline–azoimine (NN′N″) tridentate ligands : Synthesis, spectral characterization, electrochemical properties and single-crystal X-ray structure analysis},
  volume={125},
  issn={1386-1425},
  journal={Spectrochimica Acta Part A : Molecular and Biomolecular Spectroscopy},
  pages={375--383},
  author={Al-Noaimi, Mousa and Abdel-Rahman, Obadah S. and Fasfous, Ismail I. and El-khateeb, Mohammad and Awwadi, Firas A. and Warad, Ismail}
}

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    <dcterms:abstract xml:lang="eng">Four octahedral ruthenium(II) azoimine–quinoline complexes having the general molecular formula [RuII(Lsingle bondY)(bpy)Cl](PF&lt;sub&gt;6&lt;/sub&gt;) {Lsingle bondY = YC&lt;sub&gt;6&lt;/sub&gt;H&lt;sub&gt;4&lt;/sub&gt;Ndouble bond; length as m-dashNC(COCH&lt;sub&gt;3&lt;/sub&gt;)double bond; length as m-dashNC&lt;sub&gt;9&lt;/sub&gt;H&lt;sub&gt;6&lt;/sub&gt;N, Y = H (1), CH&lt;sub&gt;3&lt;/sub&gt; (2), Br (3), NO&lt;sub&gt;2&lt;/sub&gt; (4) and bpy = 2,2′-bipyrdine} were synthesized. The azoimine–quinoline based ligands behave as NN′N″ tridentate donors and coordinated to ruthenium via azo-N′, imine-N′ and quinolone-N″ nitrogen atoms. The composition of the complexes has been established by elemental analysis, spectral methods (FT-IR, electronic, &lt;sup&gt;1&lt;/sup&gt;H NMR, UV/Vis and electrochemical (cyclic voltammetry) techniques. The crystal structure of complex 1 is reported. The Ru(II) oxidation state is greatly stabilized by the novel tridentate ligands, showing Ru(III/II) couples ranging from 0.93–1.27 V vs. Cp&lt;sub&gt;2&lt;/sub&gt;Fe/Cp&lt;sub&gt;2&lt;/sub&gt;Fe&lt;sup&gt;+&lt;/sup&gt;. The absorption spectrum of 1 in dichloromethane was modeled by time-dependent density functional theory (TD-DFT).</dcterms:abstract>
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