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Fluorescence properties of europium and samarium. beta. -diketonates and their use in fluorometry

Journal Article:

Abstract

Several europium and samarium ..beta..-diketonates (tta, ntfa, bfa) complexed with 1, 10-phenanthroline, or with trioctylphosphine oxide (topo) were synthesized. The fluorescence properties of these compounds in benzene or hexane have been studied. Absorption and fluorescence spectra, fluorescence quantum yield, fluorescence sensitivity index (F.S.I.), and fluorescence lifetime were measured. From the measurement of fluorescence lifetime of the ..beta..-diketonates, the velocity of radiative process (k sub(f)/phi sub(f)) has almost the same value for benzene and hexane solvent. The red fluorescence (Em. max. : 619 nm) of Eu(III) in these chelates is attributed to transitions from /sup 5/D/sub 0/ ..-->.. /sup 7/F/sub 2/ levels of this ion, and the three-band spectrum (Em. max. : 569 nm, 606 nm, 650 nm) indicates the transitions from the /sup 4/G sub(5/2) ..-->.. /sup 6/H sub(5/2), /sup 4/G sub(5/2) ..-->.. /sup 6/H sub(7/2), and /sup 4/G sub(5/2) ..-->.. /sup 6/H sub(9/2) levels of Sm(III), respectively. These spectra are not changed by any solvents and ligands. From the results, the fluorescence of the ..beta..-diketonates in organic solvent has been attributed to m* ..-->.. m luminescence transition. The complexes of Eu(III) and Sm(III) show radiative transition within orbitals, composed exclusively of 4f orbitals of rare earth ions (m* ..-->..  More>>
Authors:
Huang, H; Hiraki, K; Nishikawa, Y [1] 
  1. Kinki Univ., Higashi-Osaka, Osaka (Japan). Faculty of Science and Technology
Publication Date:
Jan 01, 1981
Product Type:
Journal Article
Reference Number:
AIX-13-694971; EDB-82-164836
Resource Relation:
Journal Name: Nippon Kagaku Kaishi; (Japan); Journal Volume: 1981:1
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; EUROPIUM; FLUORESCENCE SPECTROSCOPY; SAMARIUM; ABSORPTION SPECTRA; CHEMICAL PREPARATION; EUROPIUM COMPLEXES; FLUORESCENCE; PHENANTHROLINE-ORTHO; QUANTITATIVE CHEMICAL ANALYSIS; SAMARIUM COMPLEXES; SOLVENT EXTRACTION; TOPO; TRACE AMOUNTS; TTA; CHEMICAL ANALYSIS; COMPLEXES; ELEMENTS; EMISSION SPECTROSCOPY; EXTRACTION; HETEROCYCLIC COMPOUNDS; KETONES; LUMINESCENCE; METALS; ORGANIC COMPOUNDS; ORGANIC FLUORINE COMPOUNDS; ORGANIC HALOGEN COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; ORGANIC PHOSPHORUS COMPOUNDS; ORGANIC SULFUR COMPOUNDS; PHENANTHROLINES; RARE EARTH COMPLEXES; RARE EARTHS; REAGENTS; SEPARATION PROCESSES; SPECTRA; SPECTROSCOPY; SYNTHESIS; 400104* - Spectral Procedures- (-1987); 400301 - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)
OSTI ID:
6847549
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Journal ID: CODEN: NKAKB
Submitting Site:
HEDB
Size:
Pages: 66-73
Announcement Date:
Sep 01, 1982

Journal Article:

Citation Formats

Huang, H, Hiraki, K, and Nishikawa, Y. Fluorescence properties of europium and samarium. beta. -diketonates and their use in fluorometry. Japan: N. p., 1981. Web.
Huang, H, Hiraki, K, & Nishikawa, Y. Fluorescence properties of europium and samarium. beta. -diketonates and their use in fluorometry. Japan.
Huang, H, Hiraki, K, and Nishikawa, Y. 1981. "Fluorescence properties of europium and samarium. beta. -diketonates and their use in fluorometry." Japan.
@misc{etde_6847549,
title = {Fluorescence properties of europium and samarium. beta. -diketonates and their use in fluorometry}
author = {Huang, H, Hiraki, K, and Nishikawa, Y}
abstractNote = {Several europium and samarium ..beta..-diketonates (tta, ntfa, bfa) complexed with 1, 10-phenanthroline, or with trioctylphosphine oxide (topo) were synthesized. The fluorescence properties of these compounds in benzene or hexane have been studied. Absorption and fluorescence spectra, fluorescence quantum yield, fluorescence sensitivity index (F.S.I.), and fluorescence lifetime were measured. From the measurement of fluorescence lifetime of the ..beta..-diketonates, the velocity of radiative process (k sub(f)/phi sub(f)) has almost the same value for benzene and hexane solvent. The red fluorescence (Em. max. : 619 nm) of Eu(III) in these chelates is attributed to transitions from /sup 5/D/sub 0/ ..-->.. /sup 7/F/sub 2/ levels of this ion, and the three-band spectrum (Em. max. : 569 nm, 606 nm, 650 nm) indicates the transitions from the /sup 4/G sub(5/2) ..-->.. /sup 6/H sub(5/2), /sup 4/G sub(5/2) ..-->.. /sup 6/H sub(7/2), and /sup 4/G sub(5/2) ..-->.. /sup 6/H sub(9/2) levels of Sm(III), respectively. These spectra are not changed by any solvents and ligands. From the results, the fluorescence of the ..beta..-diketonates in organic solvent has been attributed to m* ..-->.. m luminescence transition. The complexes of Eu(III) and Sm(III) show radiative transition within orbitals, composed exclusively of 4f orbitals of rare earth ions (m* ..-->.. m radiative transition). Fluorinated ligands show better sensitivity than unfluorinated ligands, and the best sensitivity is obtained with TTA-phen system, and/or TTA-topo system for the spectrofluorometric determination of the two metals. In the case of Eu determination, 619 nm emission wavelength is used (the determinable range : 0.2 -- 10 ppb Eu), and in the case of Sm determination, 650 nm emission wavelength is adopted (the determinable range : 0.1 -- 1 ppm Sm), because of much higher sensitivity than the other two peaks (569, 606 nm) without interference from europium complex.}
journal = {Nippon Kagaku Kaishi; (Japan)}
volume = {1981:1}
journal type = {AC}
place = {Japan}
year = {1981}
month = {Jan}
}