Synthesis, Structure, and Photophysical Properties of Novel Ruthenium(II) Carboxypyridine Type Complexes

Thomas Norrby, Anna Börje, Björn Åkermark, Leif Hammarström, Jan Alsins, Kianosh Lashgari, Rolf Norrestam, Jerker Mårtensson, Gunnar Stenhagen

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Abstract

A series of Ru(II) compounds and salts have been synthesized: [Ru(6-carboxylato-bpy)2] (5), [Ru(6-carboxylato-bpy)(tpy)]PF6 (9), [Ru(tpy)2](PF6)2 (8), and [Ru(bpy)2(Pic)]PF6 (11), where 6-carboxy-bpy (1) = 6-carboxy-2,2′-bipyridine, tpy (2) = 2,2′:6′,2″-terpyridine, and Pic = 2-carboxylatopyridine. The compounds have been characterized by NMR, electrospray mass spectrometry (ESI-MS), cyclic voltammetry, absorption and emission spectroscopy (at 100, 140, and 298 K), and single-crystal X-ray diffraction (complex 5). Complex 5 crystallizes in the monoclinic system, space group P21/n, formula RuC22H14N4O4·C 2H5OH, with a = 11.088(3) Å, b = 11.226-(3) Å, c = 35.283(9) Å, β= 91.41(2)°, and Z = 8. A linear dependence on the number of coordinated carboxylato groups and the electrochemical redox potentials was found, ca. 0.4 V lower reduction potential for the oxidation step (Ru(II/III)) per carboxylate group. Also, to the best of our knowledge, these are the first examples (9, 11) of mononuclear Ru(II) complexes containing a carboxypyridine-ruthenium moiety displaying any luminescence emission.

Original languageEnglish
Pages (from-to)5850-5858
Number of pages9
JournalInorganic Chemistry
Volume36
Issue number25
Publication statusPublished - 1997

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Ruthenium
Emission spectroscopy
Absorption spectroscopy
ruthenium
Cyclic voltammetry
Mass spectrometry
Luminescence
Salts
Nuclear magnetic resonance
Single crystals
X ray diffraction
Oxidation
synthesis
spectroscopy
carboxylates
absorption spectroscopy
mass spectroscopy
luminescence
salts
nuclear magnetic resonance

ASJC Scopus subject areas

  • Inorganic Chemistry

Cite this

Norrby, T., Börje, A., Åkermark, B., Hammarström, L., Alsins, J., Lashgari, K., ... Stenhagen, G. (1997). Synthesis, Structure, and Photophysical Properties of Novel Ruthenium(II) Carboxypyridine Type Complexes. Inorganic Chemistry, 36(25), 5850-5858.

Synthesis, Structure, and Photophysical Properties of Novel Ruthenium(II) Carboxypyridine Type Complexes. / Norrby, Thomas; Börje, Anna; Åkermark, Björn; Hammarström, Leif; Alsins, Jan; Lashgari, Kianosh; Norrestam, Rolf; Mårtensson, Jerker; Stenhagen, Gunnar.

In: Inorganic Chemistry, Vol. 36, No. 25, 1997, p. 5850-5858.

Research output: Contribution to journalArticle

Norrby, T, Börje, A, Åkermark, B, Hammarström, L, Alsins, J, Lashgari, K, Norrestam, R, Mårtensson, J & Stenhagen, G 1997, 'Synthesis, Structure, and Photophysical Properties of Novel Ruthenium(II) Carboxypyridine Type Complexes', Inorganic Chemistry, vol. 36, no. 25, pp. 5850-5858.
Norrby, Thomas ; Börje, Anna ; Åkermark, Björn ; Hammarström, Leif ; Alsins, Jan ; Lashgari, Kianosh ; Norrestam, Rolf ; Mårtensson, Jerker ; Stenhagen, Gunnar. / Synthesis, Structure, and Photophysical Properties of Novel Ruthenium(II) Carboxypyridine Type Complexes. In: Inorganic Chemistry. 1997 ; Vol. 36, No. 25. pp. 5850-5858.
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AU - Norrby, Thomas

AU - Börje, Anna

AU - Åkermark, Björn

AU - Hammarström, Leif

AU - Alsins, Jan

AU - Lashgari, Kianosh

AU - Norrestam, Rolf

AU - Mårtensson, Jerker

AU - Stenhagen, Gunnar

PY - 1997

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N2 - A series of Ru(II) compounds and salts have been synthesized: [Ru(6-carboxylato-bpy)2] (5), [Ru(6-carboxylato-bpy)(tpy)]PF6 (9), [Ru(tpy)2](PF6)2 (8), and [Ru(bpy)2(Pic)]PF6 (11), where 6-carboxy-bpy (1) = 6-carboxy-2,2′-bipyridine, tpy (2) = 2,2′:6′,2″-terpyridine, and Pic = 2-carboxylatopyridine. The compounds have been characterized by NMR, electrospray mass spectrometry (ESI-MS), cyclic voltammetry, absorption and emission spectroscopy (at 100, 140, and 298 K), and single-crystal X-ray diffraction (complex 5). Complex 5 crystallizes in the monoclinic system, space group P21/n, formula RuC22H14N4O4·C 2H5OH, with a = 11.088(3) Å, b = 11.226-(3) Å, c = 35.283(9) Å, β= 91.41(2)°, and Z = 8. A linear dependence on the number of coordinated carboxylato groups and the electrochemical redox potentials was found, ca. 0.4 V lower reduction potential for the oxidation step (Ru(II/III)) per carboxylate group. Also, to the best of our knowledge, these are the first examples (9, 11) of mononuclear Ru(II) complexes containing a carboxypyridine-ruthenium moiety displaying any luminescence emission.

AB - A series of Ru(II) compounds and salts have been synthesized: [Ru(6-carboxylato-bpy)2] (5), [Ru(6-carboxylato-bpy)(tpy)]PF6 (9), [Ru(tpy)2](PF6)2 (8), and [Ru(bpy)2(Pic)]PF6 (11), where 6-carboxy-bpy (1) = 6-carboxy-2,2′-bipyridine, tpy (2) = 2,2′:6′,2″-terpyridine, and Pic = 2-carboxylatopyridine. The compounds have been characterized by NMR, electrospray mass spectrometry (ESI-MS), cyclic voltammetry, absorption and emission spectroscopy (at 100, 140, and 298 K), and single-crystal X-ray diffraction (complex 5). Complex 5 crystallizes in the monoclinic system, space group P21/n, formula RuC22H14N4O4·C 2H5OH, with a = 11.088(3) Å, b = 11.226-(3) Å, c = 35.283(9) Å, β= 91.41(2)°, and Z = 8. A linear dependence on the number of coordinated carboxylato groups and the electrochemical redox potentials was found, ca. 0.4 V lower reduction potential for the oxidation step (Ru(II/III)) per carboxylate group. Also, to the best of our knowledge, these are the first examples (9, 11) of mononuclear Ru(II) complexes containing a carboxypyridine-ruthenium moiety displaying any luminescence emission.

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