Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 63,
  • Issue 5,
  • pp. 483-493
  • (2009)

Spectroscopic System for Direct Lanthanide Photoluminescence Spectroscopy with Nanomolar Detection Limits

Not Accessible

Your library or personal account may give you access

Abstract

A new spectroscopic system for direct photoluminescence of lanthanide ions (Ln(III)) through electronic transitions within the 4f<sup>n</sup> manifold is described. The system is based on an injection seeded frequency tripled (λ = 355 nm) Nd:YAG pump laser coupled with a master oscillator power oscillator (MOPO). The MOPO delivers an average pulse energy of ∼60 mJ/pulse, is continuously tunable from 425 to 690 nm (Signal) and 735 to 1800 nm (Idler) with a linewidth of <0.2 cm<sup>−1</sup>, and has a pulse duration of 10–12 ns. Aqueous solutions containing two polyaminocarboxylate complexes, ethylenediaminetetraacetic acid (EDTA) and diethylenetriaminepentaacetic acid (DTPA), and Ln<sup>3+</sup> aqua ion for several lanthanides including Eu(III), Tb(III), Dy(III), and Sm(III)) are used as steady-state and time-resolved photoluminescence standards. The versatility of the instrument is demonstrated by excitation scans over a broad visible range for aqueous solutions of complexes of Eu(III), Dy(III), Sm(III), and Tb(III). The Eu(III) excitation band (<sup>7</sup>F<sub>o</sub>→<sup>5</sup>D<sub>o</sub>) is recorded over a range of complex concentrations that are 1000–fold less than reported previously, including Eu(EDTA) (1.00 nM), Eu(DTPA) (1.00 nM), and Eu(III) aqua ion (50.0 nM). Emission spectra are recorded in the visible range for Ln(III) complexes at pH 6.5 and 1.00 mM. Excited-state lifetimes for the standards were constant as a function of concentration from 10.0 nM to 1.00 mM for Eu(EDTA) and Eu(DTPA) and from 100 nM to 1.00 mM for Eu(III) aqua ion. Photoluminescence lifetimes in H<sub>2</sub>O and D<sub>2</sub>O are recorded and used to calculate the number of bound water molecules for all complexes.

PDF Article
More Like This
Advances in luminescence of lanthanide doped Y2O3: case of S6 sites

Daniel Avram, Bogdan Cojocaru, Mihaela Florea, and Carmen Tiseanu
Opt. Mater. Express 6(5) 1635-1643 (2016)

Upconversion from aqueous phase lanthanide chelates

Xudong Xiao, Jeanne P. Haushalter, and Gregory W. Faris
Opt. Lett. 30(13) 1674-1676 (2005)

First ionization potentials of lanthanides by laser spectroscopy*

E. F. Worden, R. W. Solarz, J. A. Paisner, and J. G. Conway
J. Opt. Soc. Am. 68(1) 52-61 (1978)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved