Emission Polarization of Europium and Terbium Chelates

Jeff G. Reifenberger, Gregory E. Snyder, Gordon Baym, Paul R. Selvin

Research output: Contribution to journalArticle

Abstract

We measured the anisotropy of Tb 3+ and Eu 3+ in various chelate complexes bound with or without a carbostyril antenna. The anisotropy of the lanthanides depends on the chelate as well as whether the antenna is present. The anisotropy of Eu 3+ bound to only a chelate is high while for Tb 3+ the anisotropy is nearly zero. For Eu 3+, the anisotropy decreases upon addition of the antenna, while for Tb 3+ the anisotropy slightly increases once the antenna is attached. A theoretical model is discussed to account for the measured anisotropy of the Eu 3+ bound to the chelate and how the addition of the antenna affects the anisotropy. While the transitions within Tb 3+ are more complicated than those in Eu 3+, the theoretical model is also extended to Tb 3+ to explain qualitatively how the addition of the antenna affects the measured anisotropy of the terbium complex. Because of their low anisotropy, both Tb 3+ and Eu 3+, when bound to a chelate with an antenna, are ideal luminescent probes in resonance energy transfer experiments for measuring nanometer scale distances. Our results indicate that it may be possible to construct a probe with Eu 3+ that retains its high anisotropy once the antenna is added to the chelate complex. This probe could measure rotational motion on the millisecond lifetime.

Original languageEnglish (US)
Pages (from-to)12862-12873
Number of pages12
JournalJournal of Physical Chemistry B
Volume107
Issue number46
StatePublished - Nov 20 2003

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Terbium
Europium
terbium
europium
chelates
Anisotropy
Polarization
anisotropy
antennas
polarization
Antennas
probes
Lanthanoid Series Elements
Rare earth elements
Energy transfer

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Reifenberger, J. G., Snyder, G. E., Baym, G., & Selvin, P. R. (2003). Emission Polarization of Europium and Terbium Chelates. Journal of Physical Chemistry B, 107(46), 12862-12873.

Emission Polarization of Europium and Terbium Chelates. / Reifenberger, Jeff G.; Snyder, Gregory E.; Baym, Gordon; Selvin, Paul R.

In: Journal of Physical Chemistry B, Vol. 107, No. 46, 20.11.2003, p. 12862-12873.

Research output: Contribution to journalArticle

Reifenberger, JG, Snyder, GE, Baym, G & Selvin, PR 2003, 'Emission Polarization of Europium and Terbium Chelates', Journal of Physical Chemistry B, vol. 107, no. 46, pp. 12862-12873.
Reifenberger JG, Snyder GE, Baym G, Selvin PR. Emission Polarization of Europium and Terbium Chelates. Journal of Physical Chemistry B. 2003 Nov 20;107(46):12862-12873.
Reifenberger, Jeff G. ; Snyder, Gregory E. ; Baym, Gordon ; Selvin, Paul R. / Emission Polarization of Europium and Terbium Chelates. In: Journal of Physical Chemistry B. 2003 ; Vol. 107, No. 46. pp. 12862-12873.
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