Strong Circularly Polarized Luminescence from Highly Emissive Terbium Complexes in Aqueous Solution

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Two luminescent terbium(III) complexes have been prepared from chiral ligands containing 2-hydroxyisophthalamide (IAM) antenna chromophores and their non-polarized and circularly-polarized luminescence properties have been studied. These tetradentate ligands, which form 2:1 ligand/Tb{sup III} complexes, utilize diaminocyclohexane (cyLI) and diphenylethylenediamine (dpenLI) backbones, which we reasoned would impart conformational rigidity and result in Tb{sup III} complexes that display both large luminescence quantum yield ({phi}) values and strong circularly polarized luminescence (CPL) activities. Both Tb{sup III} complexes are highly emissive, with {phi} values of 0.32 (dpenLI-Tb) and 0.60 (cyLI-Tb). Luminescence lifetime measurements in H{sub 2}O and D{sub 2}O indicate that while cyLI-Tb exists ... continued below

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Samuel, Amanda; Lunkley, Jamie; Muller, Gilles & Raymond, Kenneth March 15, 2010.

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Two luminescent terbium(III) complexes have been prepared from chiral ligands containing 2-hydroxyisophthalamide (IAM) antenna chromophores and their non-polarized and circularly-polarized luminescence properties have been studied. These tetradentate ligands, which form 2:1 ligand/Tb{sup III} complexes, utilize diaminocyclohexane (cyLI) and diphenylethylenediamine (dpenLI) backbones, which we reasoned would impart conformational rigidity and result in Tb{sup III} complexes that display both large luminescence quantum yield ({phi}) values and strong circularly polarized luminescence (CPL) activities. Both Tb{sup III} complexes are highly emissive, with {phi} values of 0.32 (dpenLI-Tb) and 0.60 (cyLI-Tb). Luminescence lifetime measurements in H{sub 2}O and D{sub 2}O indicate that while cyLI-Tb exists as a single species in solution, dpenLI-Tb exists as two species: a monohydrate complex with one H{sub 2}O molecule directly bound to the Tb{sup III} ion and a complex with no water molecules in the inner coordination sphere. Both cyLI-Tb and dpenLI-Tb display increased CPL activity compared to previously reported Tb{sup III} complexes made with chiral IAM ligands. The CPL measurements also provide additional confirmation of the presence of a single emissive species in solution in the case of cyLI-Tb, and multiple emissive species in the case of dpenLI-Tb.

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  • Journal Name: European Journal of Inorganic Chemistry; Journal Volume: 2010; Journal Issue: 21

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  • Report No.: LBNL-4045E
  • Grant Number: DE-AC02-05CH11231
  • DOI: 10.1002/ejic.201000309 | External Link
  • Office of Scientific & Technical Information Report Number: 1000052
  • Archival Resource Key: ark:/67531/metadc831711

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  • March 15, 2010

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  • May 19, 2016, 3:16 p.m.

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  • July 26, 2016, 5:48 p.m.

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Samuel, Amanda; Lunkley, Jamie; Muller, Gilles & Raymond, Kenneth. Strong Circularly Polarized Luminescence from Highly Emissive Terbium Complexes in Aqueous Solution, article, March 15, 2010; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc831711/: accessed June 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.