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Article: Structure and spectroscopic properties of luminescent cyclometalated platinum(II) complexes with chiral phosphine substituted carbohydrate ligands

TitleStructure and spectroscopic properties of luminescent cyclometalated platinum(II) complexes with chiral phosphine substituted carbohydrate ligands
Authors
Issue Date2000
PublisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/dalton
Citation
Journal of the Chemical Society Dalton Transactions, 2000, v. 18, p. 3128-3232 How to Cite?
AbstractA series of new chiral cyclometalated platinum(II) complexes containing carbohydrate phosphine ligands have been prepared. The reaction of [Pt(ppy)Cl]2 (Hppy = 2-phenylpyridine) with the chiral phosphines n-Hmbpa (methyl 4,6-O-benzylidene-n-deoxy-n-(diphenylphosphino)-α-D-altropyranoside, n = 2 or 3) afforded cis-[Pt(ppy)(n-Hmbpa)Cl] (n = 2 2a or 3 2b) in high yields. Treatment of 2a or 2b with an excess of NaOCH3 gave the alkoxoplatinum(II) complexes trans-[Pt(ppy)(n-mbpa)] (n = 2 3a or 3 3b). The crystal structure of 3b shows that the phosphorus atom is located trans to the nitrogen atom of the ppy ligand and the pyranose ring is in a boat conformation. Moderately intense UV-vis absorption bands assigned to metal-to-ligand charge-transfer (MLCT) transitions are shifted from ca. 376–382 to ca. 414–416 nm when the chloride ligand is substituted by the pendant alkoxide group. In solid state and 77 K MeOH–EtOH (4∶1) glass solution, complexes 2 and 3 show a vibronic structured emission in the range 450–650 nm. Complex 2 is non-emissive in fluid solution at room temperature whereas 3 shows a long-lived 3MLCT emission in both CH3CN and CH2Cl2 at room temperature.
Persistent Identifierhttp://hdl.handle.net/10722/70242
ISSN
2002 Impact Factor: 3.023
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorShi, JCen_HK
dc.contributor.authorChao, HYen_HK
dc.contributor.authorFu, WFen_HK
dc.contributor.authorPeng, SMen_HK
dc.contributor.authorChe, CMen_HK
dc.date.accessioned2010-09-06T06:21:03Z-
dc.date.available2010-09-06T06:21:03Z-
dc.date.issued2000en_HK
dc.identifier.citationJournal of the Chemical Society Dalton Transactions, 2000, v. 18, p. 3128-3232en_HK
dc.identifier.issn1472-7773en_HK
dc.identifier.urihttp://hdl.handle.net/10722/70242-
dc.description.abstractA series of new chiral cyclometalated platinum(II) complexes containing carbohydrate phosphine ligands have been prepared. The reaction of [Pt(ppy)Cl]2 (Hppy = 2-phenylpyridine) with the chiral phosphines n-Hmbpa (methyl 4,6-O-benzylidene-n-deoxy-n-(diphenylphosphino)-α-D-altropyranoside, n = 2 or 3) afforded cis-[Pt(ppy)(n-Hmbpa)Cl] (n = 2 2a or 3 2b) in high yields. Treatment of 2a or 2b with an excess of NaOCH3 gave the alkoxoplatinum(II) complexes trans-[Pt(ppy)(n-mbpa)] (n = 2 3a or 3 3b). The crystal structure of 3b shows that the phosphorus atom is located trans to the nitrogen atom of the ppy ligand and the pyranose ring is in a boat conformation. Moderately intense UV-vis absorption bands assigned to metal-to-ligand charge-transfer (MLCT) transitions are shifted from ca. 376–382 to ca. 414–416 nm when the chloride ligand is substituted by the pendant alkoxide group. In solid state and 77 K MeOH–EtOH (4∶1) glass solution, complexes 2 and 3 show a vibronic structured emission in the range 450–650 nm. Complex 2 is non-emissive in fluid solution at room temperature whereas 3 shows a long-lived 3MLCT emission in both CH3CN and CH2Cl2 at room temperature.-
dc.languageengen_HK
dc.publisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/daltonen_HK
dc.relation.ispartofJournal of the Chemical Society Dalton Transactionsen_HK
dc.titleStructure and spectroscopic properties of luminescent cyclometalated platinum(II) complexes with chiral phosphine substituted carbohydrate ligandsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1472-7773&volume=&issue=18&spage=3128&epage=3232&date=2000&atitle=Structure+and+spectroscopic+properties+of+luminescent+cyclometalated+platinum(II)+complexes+with+chiral+phosphine+substituted+carbohydrate+ligandsen_HK
dc.identifier.emailChe, CM: cmche@hku.hken_HK
dc.identifier.authorityChe, CM=rp00670en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1039/B002976I-
dc.identifier.scopuseid_2-s2.0-0009657627-
dc.identifier.hkuros62381en_HK
dc.identifier.volume18-
dc.identifier.spage3128-
dc.identifier.epage3232-
dc.identifier.isiWOS:000089170200014-
dc.publisher.placeUnited Kingdom-

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