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Article: Cobalt(II) tris(2-pyridylmethyl)amine complexes [Co(TPA)X]+ bearing coordinating anion (X = Cl−, Br−, I− and NCS−): synthesis and application for carbon dioxide reduction

TitleCobalt(II) tris(2-pyridylmethyl)amine complexes [Co(TPA)X]+ bearing coordinating anion (X = Cl−, Br−, I− and NCS−): synthesis and application for carbon dioxide reduction
Authors
Issue Date2016
PublisherElsevier. The Journal's web site is located at http://www.elsevier.com/locate/poly
Citation
Polyhedron, 2016, v. 125, p. 156-163 How to Cite?
AbstractFour cobalt(II) complexes supported by the tripodal ligand tris(2-pyridylmethyl)amine (TPA) and ancillary coordinated anion (X), [Co(TPA)X]+ (X = Cl−, Br−, I− and NCS−) (1–4), have been prepared. Magnetic susceptibility measurement and electronic spectroscopy indicate that they are five-coordinated high spin cobalt(II) complexes. The structures of 2–4 have been determined by X-ray crystallography. Reduction of CO2 to CO has been observed upon irradiation of complexes 1–4 in the presence of fac-Ir(ppy)3 (ppy = C-deprotonated 2-phenylpyridine anion) and under CO2 atmosphere using blue LEDs. All of these Co complexes were found to be efficient and stable CO2 reduction catalyst with TON(CO) > 1000 and CO selectivity > 90% under 65 h of irradiation. Among them, [Co(TPA)Br]+ showed the best performance in CO2 reduction with TON(CO) > 1400 after 65 h. The coordinated anion X played an important role in the photo-catalysis. Density functional theory (DFT) calculation has also been performed to examine the mechanism and role of coordinated anion X in visible-light induced CO2 reduction.
Persistent Identifierhttp://hdl.handle.net/10722/243751

 

DC FieldValueLanguage
dc.contributor.authorChan, LF-
dc.contributor.authorLam, TL-
dc.contributor.authorYang, C-
dc.contributor.authorLai, J-
dc.contributor.authorCao, B-
dc.contributor.authorZhou, Z-
dc.contributor.authorZhu, Q-
dc.date.accessioned2017-08-25T02:59:02Z-
dc.date.available2017-08-25T02:59:02Z-
dc.date.issued2016-
dc.identifier.citationPolyhedron, 2016, v. 125, p. 156-163-
dc.identifier.urihttp://hdl.handle.net/10722/243751-
dc.description.abstractFour cobalt(II) complexes supported by the tripodal ligand tris(2-pyridylmethyl)amine (TPA) and ancillary coordinated anion (X), [Co(TPA)X]+ (X = Cl−, Br−, I− and NCS−) (1–4), have been prepared. Magnetic susceptibility measurement and electronic spectroscopy indicate that they are five-coordinated high spin cobalt(II) complexes. The structures of 2–4 have been determined by X-ray crystallography. Reduction of CO2 to CO has been observed upon irradiation of complexes 1–4 in the presence of fac-Ir(ppy)3 (ppy = C-deprotonated 2-phenylpyridine anion) and under CO2 atmosphere using blue LEDs. All of these Co complexes were found to be efficient and stable CO2 reduction catalyst with TON(CO) > 1000 and CO selectivity > 90% under 65 h of irradiation. Among them, [Co(TPA)Br]+ showed the best performance in CO2 reduction with TON(CO) > 1400 after 65 h. The coordinated anion X played an important role in the photo-catalysis. Density functional theory (DFT) calculation has also been performed to examine the mechanism and role of coordinated anion X in visible-light induced CO2 reduction.-
dc.languageeng-
dc.publisherElsevier. The Journal's web site is located at http://www.elsevier.com/locate/poly-
dc.relation.ispartofPolyhedron-
dc.rightsPosting accepted manuscript (postprint): © <year>. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/-
dc.titleCobalt(II) tris(2-pyridylmethyl)amine complexes [Co(TPA)X]+ bearing coordinating anion (X = Cl−, Br−, I− and NCS−): synthesis and application for carbon dioxide reduction-
dc.typeArticle-
dc.identifier.emailChan, LF: sharonlf@hku.hk-
dc.identifier.emailLam, TL: joeltl@hku.hk-
dc.identifier.emailYang, C: davidych@connect.hku.hk-
dc.identifier.emailCao, B: bcao@hku.hk-
dc.identifier.doi10.1016/j.poly.2016.09.049-
dc.identifier.hkuros273752-
dc.identifier.volume125-
dc.identifier.spage156-
dc.identifier.epage163-

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