New iridium(III) organometallic complexes bearing strong electron donating bidentate ligands as catalysts for water oxidation

Arianna Savini; Alberto Bucci; Gianfranco Bellachioma; Stefano Giancola; Francesco Palomba; Luca Rocchigiani; Andrea Rossi; Marta Suriani; Cristiano Zuccaccia; Alceo Macchioni

doi:10.1016/j.jorganchem.2014.05.029

New iridium(III) organometallic complexes bearing strong electron donating bidentate ligands as catalysts for water oxidation

Arianna Savini, Alberto Bucci, Gianfranco Bellachioma, Stefano Giancola, Francesco Palomba, Luca Rocchigiani, Andrea Rossi, Marta Suriani, Cristiano Zuccaccia, Alceo Macchioni

Chemistry of Materials and Catalysis

Research output: Contribution to journal › Article › peer-review

35 Citations (Scopus)

Abstract

Complexes [Cp*Ir(ppy)NO₃] (ppy = 2-phenylpyridine, 1), [Cp*Ir(2′,4′-F₂-ppy)NO₃] (2b), [Cp*Ir(κ²-C²,C²′-NHC)Cl], (κ2-C2,C2′-NHC = κ2-C2,C2′-1,3-bis(4-(N,N-dimethylamino)phenyl)-imidazol-2-ylidene, 3), [Cp*Ir(bpyr)(SOMe₂)] (bpyr = bis-diethyl-pyrrole, 4), [Cp*Ir(bimH₂)Cl]Cl (bimH2 = 2,2′-bisimidazole, 5) and [Cp*IrCl(μ²-κ²-κ¹-bimH)IrCl₂Cp*] (6) have been synthesized and characterized in solution by multinuclear and multidimensional NMR spectroscopy. The structures in the solid state of 3 and 6 have been determined by means of single-crystal diffraction X-Ray studies. Complexes 1–6 were found to be effective catalysts for water oxidation to molecular oxygen driven by cerium ammonium nitrate. The highest activity was observed for 4 (TOF_max = 12 min⁻¹, TON > 500), 5 (TOF_max = 23 min⁻¹, TON > 500) and 6 (TOF_max = 51 min⁻¹, TON > 500) bearing more electron-donating ligands.

Original language	English
Pages (from-to)	24-32
Journal	Journal of Organometallic Chemistry
Volume	771
Early online date	3 Jul 2014
DOIs	https://doi.org/10.1016/j.jorganchem.2014.05.029
Publication status	Published - Nov 2014

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Savini, A., Bucci, A., Bellachioma, G., Giancola, S., Palomba, F., Rocchigiani, L., Rossi, A., Suriani, M., Zuccaccia, C., & Macchioni, A. (2014). New iridium(III) organometallic complexes bearing strong electron donating bidentate ligands as catalysts for water oxidation. Journal of Organometallic Chemistry, 771, 24-32. https://doi.org/10.1016/j.jorganchem.2014.05.029

Savini, Arianna ; Bucci, Alberto ; Bellachioma, Gianfranco ; Giancola, Stefano ; Palomba, Francesco ; Rocchigiani, Luca ; Rossi, Andrea ; Suriani, Marta ; Zuccaccia, Cristiano ; Macchioni, Alceo. / New iridium(III) organometallic complexes bearing strong electron donating bidentate ligands as catalysts for water oxidation. In: Journal of Organometallic Chemistry. 2014 ; Vol. 771. pp. 24-32.

@article{9ff3c2166b9b42568d85eb252d94e6bc,

title = "New iridium(III) organometallic complexes bearing strong electron donating bidentate ligands as catalysts for water oxidation",

abstract = "Complexes [Cp*Ir(ppy)NO3] (ppy = 2-phenylpyridine, 1), [Cp*Ir(2′,4′-F2-ppy)NO3] (2b), [Cp*Ir(κ2-C2,C2′-NHC)Cl], (κ2-C2,C2′-NHC = κ2-C2,C2′-1,3-bis(4-(N,N-dimethylamino)phenyl)-imidazol-2-ylidene, 3), [Cp*Ir(bpyr)(SOMe2)] (bpyr = bis-diethyl-pyrrole, 4), [Cp*Ir(bimH2)Cl]Cl (bimH2 = 2,2′-bisimidazole, 5) and [Cp*IrCl(μ2-κ2-κ1-bimH)IrCl2Cp*] (6) have been synthesized and characterized in solution by multinuclear and multidimensional NMR spectroscopy. The structures in the solid state of 3 and 6 have been determined by means of single-crystal diffraction X-Ray studies. Complexes 1–6 were found to be effective catalysts for water oxidation to molecular oxygen driven by cerium ammonium nitrate. The highest activity was observed for 4 (TOFmax = 12 min−1, TON > 500), 5 (TOFmax = 23 min−1, TON > 500) and 6 (TOFmax = 51 min−1, TON > 500) bearing more electron-donating ligands.",

author = "Arianna Savini and Alberto Bucci and Gianfranco Bellachioma and Stefano Giancola and Francesco Palomba and Luca Rocchigiani and Andrea Rossi and Marta Suriani and Cristiano Zuccaccia and Alceo Macchioni",

year = "2014",

month = nov,

doi = "10.1016/j.jorganchem.2014.05.029",

language = "English",

volume = "771",

pages = "24--32",

journal = "Journal of Organometallic Chemistry",

issn = "0022-328X",

publisher = "Elsevier",

}

New iridium(III) organometallic complexes bearing strong electron donating bidentate ligands as catalysts for water oxidation. / Savini, Arianna; Bucci, Alberto; Bellachioma, Gianfranco; Giancola, Stefano; Palomba, Francesco; Rocchigiani, Luca; Rossi, Andrea; Suriani, Marta; Zuccaccia, Cristiano; Macchioni, Alceo.

In: Journal of Organometallic Chemistry, Vol. 771, 11.2014, p. 24-32.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - New iridium(III) organometallic complexes bearing strong electron donating bidentate ligands as catalysts for water oxidation

AU - Savini, Arianna

AU - Bucci, Alberto

AU - Bellachioma, Gianfranco

AU - Giancola, Stefano

AU - Palomba, Francesco

AU - Rocchigiani, Luca

AU - Rossi, Andrea

AU - Suriani, Marta

AU - Zuccaccia, Cristiano

AU - Macchioni, Alceo

PY - 2014/11

Y1 - 2014/11

N2 - Complexes [Cp*Ir(ppy)NO3] (ppy = 2-phenylpyridine, 1), [Cp*Ir(2′,4′-F2-ppy)NO3] (2b), [Cp*Ir(κ2-C2,C2′-NHC)Cl], (κ2-C2,C2′-NHC = κ2-C2,C2′-1,3-bis(4-(N,N-dimethylamino)phenyl)-imidazol-2-ylidene, 3), [Cp*Ir(bpyr)(SOMe2)] (bpyr = bis-diethyl-pyrrole, 4), [Cp*Ir(bimH2)Cl]Cl (bimH2 = 2,2′-bisimidazole, 5) and [Cp*IrCl(μ2-κ2-κ1-bimH)IrCl2Cp*] (6) have been synthesized and characterized in solution by multinuclear and multidimensional NMR spectroscopy. The structures in the solid state of 3 and 6 have been determined by means of single-crystal diffraction X-Ray studies. Complexes 1–6 were found to be effective catalysts for water oxidation to molecular oxygen driven by cerium ammonium nitrate. The highest activity was observed for 4 (TOFmax = 12 min−1, TON > 500), 5 (TOFmax = 23 min−1, TON > 500) and 6 (TOFmax = 51 min−1, TON > 500) bearing more electron-donating ligands.

AB - Complexes [Cp*Ir(ppy)NO3] (ppy = 2-phenylpyridine, 1), [Cp*Ir(2′,4′-F2-ppy)NO3] (2b), [Cp*Ir(κ2-C2,C2′-NHC)Cl], (κ2-C2,C2′-NHC = κ2-C2,C2′-1,3-bis(4-(N,N-dimethylamino)phenyl)-imidazol-2-ylidene, 3), [Cp*Ir(bpyr)(SOMe2)] (bpyr = bis-diethyl-pyrrole, 4), [Cp*Ir(bimH2)Cl]Cl (bimH2 = 2,2′-bisimidazole, 5) and [Cp*IrCl(μ2-κ2-κ1-bimH)IrCl2Cp*] (6) have been synthesized and characterized in solution by multinuclear and multidimensional NMR spectroscopy. The structures in the solid state of 3 and 6 have been determined by means of single-crystal diffraction X-Ray studies. Complexes 1–6 were found to be effective catalysts for water oxidation to molecular oxygen driven by cerium ammonium nitrate. The highest activity was observed for 4 (TOFmax = 12 min−1, TON > 500), 5 (TOFmax = 23 min−1, TON > 500) and 6 (TOFmax = 51 min−1, TON > 500) bearing more electron-donating ligands.

UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-84908464558&partnerID=MN8TOARS

U2 - 10.1016/j.jorganchem.2014.05.029

DO - 10.1016/j.jorganchem.2014.05.029

M3 - Article

VL - 771

SP - 24

EP - 32

JO - Journal of Organometallic Chemistry

JF - Journal of Organometallic Chemistry

SN - 0022-328X

ER -

New iridium(III) organometallic complexes bearing strong electron donating bidentate ligands as catalysts for water oxidation

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