File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Iron(I) complexes of 2,9-bis(2-hydroxyphenyl)-1,10-phenanthroline (H2dophen) as electrocatalysts for carbon dioxide reduction. X-ray crystal structures of [Fe(dophen)Cl] 2·2HCON(CH3)2 and [Fe(dophen)(N-MeIm)2]ClO4 (N-MeIm = 1-methylimidazole)

TitleIron(I) complexes of 2,9-bis(2-hydroxyphenyl)-1,10-phenanthroline (H2dophen) as electrocatalysts for carbon dioxide reduction. X-ray crystal structures of [Fe(dophen)Cl] 2·2HCON(CH3)2 and [Fe(dophen)(N-MeIm)2]ClO4 (N-MeIm = 1-methylimidazole)
Authors
Issue Date2002
Citation
Journal Of The Chemical Society, Dalton Transactions, 2002 n. 4, p. 575-583 How to Cite?
AbstractThe crystal structure of two iron complexes of 2,9-bis(2-hydroxyphenyl)-1,10-phenanthroline (H 2dophen) [Fe(dophen)Cl]2·2HCON(CH3)2 [1·2HCON(CH 3)2] and [Fe(dophen)(N-MeIm) 2]ClO4[2] (N-MeIm = 1-methylimidazole) have been determined: 1·2HCON(CH 3)2, monoclinic, space group P21/n, a = 11.141(4), b = 15.519(4), c = 13.387(3) Å, β = 93.76(2)°, Z = 4; 2, triclinic, space group P1̄, a = 10.293(1), b = 12.395(3), c = 12.400(6) Å, a = 105.04(4), β = 90.54(4), γ = 99.93(1)°, Z = 2. The cyclic voltammograms of 1 and 2 in dimethylformamide show that the iron complexes undergo three successive reversible reductions with E 1/2 = -0.80 V, -2.02 V, -2.45 V for 1 and -0.75 V, -2.03 V and -2.45 V for 2 vs. the ferrocenium/ferrocene couple (Cp2Fe +/0) respectively. The first two couples are assigned as the Fe(III)/Fe(II) and Fe(II)/Fe(I) couples, whereas the couple at -2.45 V is assigned to the reduction of the dophen ligand. The Fe(I) species are active towards CO2 reduction. Electrolysis of CO2 in the presence of 1 or 2 at -2.0 V vs. Cp 2Fe+/0 gave a mixture of carbon monoxide, formate and oxalate, with formate being the major product. The rate of CO2 reduction was enhanced by the addition of 1,1,1-trifluoroethanol or methanol as the proton source to the electrolyte. Iron carbonyl and iron formato species were detected as intermediates by in-situ FTIR spectroelectrochemistry.
Persistent Identifierhttp://hdl.handle.net/10722/167725
ISSN
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorPun, SNen_US
dc.contributor.authorChung, WHen_US
dc.contributor.authorLam, KMen_US
dc.contributor.authorGuo, Pen_US
dc.contributor.authorChan, PHen_US
dc.contributor.authorWong, KYen_US
dc.contributor.authorChe, CMen_US
dc.contributor.authorChen, TYen_US
dc.contributor.authorPeng, SMen_US
dc.date.accessioned2012-10-08T03:10:30Z-
dc.date.available2012-10-08T03:10:30Z-
dc.date.issued2002en_US
dc.identifier.citationJournal Of The Chemical Society, Dalton Transactions, 2002 n. 4, p. 575-583en_US
dc.identifier.issn1470-479Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/167725-
dc.description.abstractThe crystal structure of two iron complexes of 2,9-bis(2-hydroxyphenyl)-1,10-phenanthroline (H 2dophen) [Fe(dophen)Cl]2·2HCON(CH3)2 [1·2HCON(CH 3)2] and [Fe(dophen)(N-MeIm) 2]ClO4[2] (N-MeIm = 1-methylimidazole) have been determined: 1·2HCON(CH 3)2, monoclinic, space group P21/n, a = 11.141(4), b = 15.519(4), c = 13.387(3) Å, β = 93.76(2)°, Z = 4; 2, triclinic, space group P1̄, a = 10.293(1), b = 12.395(3), c = 12.400(6) Å, a = 105.04(4), β = 90.54(4), γ = 99.93(1)°, Z = 2. The cyclic voltammograms of 1 and 2 in dimethylformamide show that the iron complexes undergo three successive reversible reductions with E 1/2 = -0.80 V, -2.02 V, -2.45 V for 1 and -0.75 V, -2.03 V and -2.45 V for 2 vs. the ferrocenium/ferrocene couple (Cp2Fe +/0) respectively. The first two couples are assigned as the Fe(III)/Fe(II) and Fe(II)/Fe(I) couples, whereas the couple at -2.45 V is assigned to the reduction of the dophen ligand. The Fe(I) species are active towards CO2 reduction. Electrolysis of CO2 in the presence of 1 or 2 at -2.0 V vs. Cp 2Fe+/0 gave a mixture of carbon monoxide, formate and oxalate, with formate being the major product. The rate of CO2 reduction was enhanced by the addition of 1,1,1-trifluoroethanol or methanol as the proton source to the electrolyte. Iron carbonyl and iron formato species were detected as intermediates by in-situ FTIR spectroelectrochemistry.en_US
dc.languageengen_US
dc.relation.ispartofJournal of the Chemical Society, Dalton Transactionsen_US
dc.titleIron(I) complexes of 2,9-bis(2-hydroxyphenyl)-1,10-phenanthroline (H2dophen) as electrocatalysts for carbon dioxide reduction. X-ray crystal structures of [Fe(dophen)Cl] 2·2HCON(CH3)2 and [Fe(dophen)(N-MeIm)2]ClO4 (N-MeIm = 1-methylimidazole)en_US
dc.typeArticleen_US
dc.identifier.emailChe, CM:cmche@hku.hken_US
dc.identifier.authorityChe, CM=rp00670en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1039/B108472K-
dc.identifier.scopuseid_2-s2.0-0036008075en_US
dc.identifier.hkuros72428-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0036008075&selection=ref&src=s&origin=recordpageen_US
dc.identifier.issue4en_US
dc.identifier.spage575en_US
dc.identifier.epage583en_US
dc.identifier.isiWOS:000173818700017-
dc.identifier.scopusauthoridPun, SN=8060003300en_US
dc.identifier.scopusauthoridChung, WH=7401983433en_US
dc.identifier.scopusauthoridLam, KM=36919953200en_US
dc.identifier.scopusauthoridGuo, P=55136950100en_US
dc.identifier.scopusauthoridChan, PH=36545749700en_US
dc.identifier.scopusauthoridWong, KY=7404760030en_US
dc.identifier.scopusauthoridChe, CM=7102442791en_US
dc.identifier.scopusauthoridChen, TY=8060004000en_US
dc.identifier.scopusauthoridPeng, SM=35464852200en_US

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats