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Uranyl fluorescence in acidic solution: quenching effects by tetramethylammonium (TMA+)

Journal Article · · Physical Chemistry Chemical Physics. PCCP
DOI:https://doi.org/10.1039/d5cp00577a· OSTI ID:2563632
 [1];  [2];  [1]
  1. Argonne National Laboratory (ANL), Argonne, IL (United States)
  2. Emory Univ., Atlanta, GA (United States)
+ Show Author Affiliations
The quenching of uranyl luminescence by various cation species was studied in aqueous media at low pH. Solutions with different nitrate salts, held at constant uranyl nitrate, nitric acid, and ion concentration, were tested to examine the quenching effects of the cations from the nitrate salts. Alkali metal (Li+, Na+, Rb+) and quaternary ammonium cations (NH4+), (CH3)4N+ (TMA+), (C2H5)4N+ (TEA+) were investigated. Solutions containing TMA+ reduced the lifetime of uranyl fluorescence significantly more than the other cations. Uranyl emission spectra also showed that TMA+ increased the complex formation between uranyl and nitrate ions. Fluorescence decay lifetime measurements for most solutions yielded values between 1.4–1.9 μs at 20 °C, while 1.8 M TMA+ reduced the lifetime of uranyl fluorescence to 0.6 μs. Decay rate versus concentration data (Stern–Volmer plots) indicated a dynamic quenching process with increasing fluorescence decay rates at higher cation concentrations for Li+, TMA+, and TEA+. The temperature dependencies of the decay rates and the kinetics in D2O were also examined.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
2563632
Alternate ID(s):
OSTI ID: 3000250
Journal Information:
Physical Chemistry Chemical Physics. PCCP, Journal Name: Physical Chemistry Chemical Physics. PCCP Journal Issue: 19 Vol. 27; ISSN 1463-9076; ISSN 1463-9084
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

References (19)

Aqueous uranyl complexes. 3. Potentiometric measurements of the hydrolysis of uranyl(VI) ion at 25�C journal December 1995
Reduction of the photoexcited uranyl ion by water journal February 2000
Electron transfer and aqua cation-cation complex formation in the excited state of the uranyl ion journal December 1980
Quenching mechanisms of uranyl luminescence by metal ions journal January 1977
Quenching of uranyl luminescence by water molecule journal January 1977
Dual luminescence of uranyl and self-quenching in aqueous acidic solution journal January 1978
The exciplex formation between uranyl species further evidenced by quenching data of the UO2+2 luminescence journal January 1977
Influence of complex formation on the electronic structure of uranyl journal July 2001
Isotope and temperature effects on photochemical reactions of uranyl ion in H2O–D2O mixtures journal June 1998
Direct Uranium(VI) and Nitrate Determinations in Nuclear Reprocessing by Time-Resolved Laser-Induced Fluorescence journal January 1996
Quenching Mechanism of Uranyl(VI) by Chloride and Bromide in Aqueous and Non-Aqueous Solutions journal May 2021
Ultrafast Transient Absorption Spectroscopy of UO22+ and [UO2Cl]+ journal August 2018
Chemical Speciation of the Uranyl Ion under Highly Alkaline Conditions. Synthesis, Structures, and Oxo Ligand Exchange Dynamics journal April 1999
Electronic Structure and Bonding in Actinyl Ions and their Analogs journal May 2007
Ultrafast Dynamics of the Excited States of the Uranyl Ion in Solutions journal April 2010
Photochemical hydrogen abstractions as radiationless transitions. Part 3.—Theoretical analysis of hydrogen abstraction by excited uranyl (UO2+2) ion journal January 1977
Deactivation processes of the lowest excited state of [UO 2 (H 2 O) 5 ] 2+ in aqueous solution journal January 2003
The photochemistry of the uranyl ion journal January 1974
Photochemistry and exciplex of the uranyl ion in aqueous solution journal January 1980

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