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Journal of Fluorescence

, Volume 17, Issue 5, pp 522–527 | Cite as

Structure and Luminescence Properties of Monomeric and Dimeric Re(I) Complexes with Dicarboxylic Acid-2,2′-Bipyridine Ligands

  • Bethany B. Hueholt
  • Wenying Xu
  • Michal Sabat
  • B. A. DeGraff
  • J. N. Demas
Original Paper

Abstract

The luminescence properties of Re(I) complexes incorporating the dcbpy ligand (dcbpy = n,n′-dicarboxylic acid-2,2′-bipyridine; n = 3, 4) were investigated as well as their utility as Pb2+ sensors. An unusual binuclear complex of the 3,3′- species was isolated. The emission intensity and lifetime for all complexes were found to be highly temperature-dependent, with quantum yields and lifetimes dramatically greater at 77 K than at room temperature. The monomeric 3,3′-dcbpy Re(I) complex demonstrates nearly 1:1 binding with Pb2+. The effect of this lead binding on the emission intensity is great, but the low quantum yields allow only for detection of the metal at the micromolar level. The binding of Pb2+ to the 4,4′-dcbpy complex is modeled and the interaction is demonstrated to involve two binding sites.

Keywords

Rhenium Luminescence Lead detection Bipyridine dicarboxylic acid 

Notes

Acknowledgments

The authors are grateful to Dr. Cynthia Day, Department of Chemistry, Wake Forest University, for the X-ray data collection. The cif file of the structure is available from the authors. We gratefully acknowledge support by NSF CHE 04-10061.

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Bethany B. Hueholt
    • 1
  • Wenying Xu
    • 1
  • Michal Sabat
    • 1
  • B. A. DeGraff
    • 2
  • J. N. Demas
    • 1
  1. 1.Chemistry DepartmentUniversity of VirginiaCharlottesvilleUSA
  2. 2.James Madison UniversityHarrisonburgUSA

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