Cation effect on energy transfer reactions from [Tb(2,6- pyridinedicarboxylate)3]3- to anionic chromium(III) and neodymium(III) complexes in aqueous solutions

Munetaka Iwamura; Makoto Morita

doi:10.1016/j.ica.2004.04.022

Cation effect on energy transfer reactions from [Tb(2,6- pyridinedicarboxylate)₃]^3- to anionic chromium(III) and neodymium(III) complexes in aqueous solutions

Munetaka Iwamura^*, Makoto Morita

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Cation effects are studied on the excitation energy transfer reaction between anionic complexes, i.e., [Tb(dpa)₃]^3- (dpa=2,6-pyridinedicarboxylate) quenched by [Cr(ox)₃]^3- (ox=oxalate ion), [Cr(mal)₃]^3- (mal=malonate ion) and [Nd(dpa)₃]^3- in aqueous solutions in the presence of alkali metal ions added for adjustments of ionic strengths. In the quenching reaction of [Cr(ox)₃]^3-, magnitudes of quenching rate constants (k_q) and energy transfer rate constant in encounter complex (k₁) are changed by the cations in the order of Li ⁺<Na⁺<K⁺≈Rb⁺≈Cs ⁺, that is quite contrary of the cation effect on energy transfer reaction between [Ru(N-N)₃]²⁺ and [Cr(ox) ₃]^3-, reported in the previous paper. On the other hand, the rate constants in quenching reactions by [Cr(mal)₃]^3- and [Nd(dpa)₃]^3- remain almost constant. This result indicates that more separated donor-acceptor pair is not sensitive to coexisting cations.

Original language	English
Pages (from-to)	3451-3455
Number of pages	5
Journal	Inorganica Chimica Acta
Volume	357
Issue number	12
DOIs	https://doi.org/10.1016/j.ica.2004.04.022
State	Published - 2004/09/10

Keywords

Aqueous solution
Complex
Electron transfer
Energy transfer
Quenching
Salt effect

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

Access to Document

10.1016/j.ica.2004.04.022

Cite this

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title = "Cation effect on energy transfer reactions from [Tb(2,6- pyridinedicarboxylate)3]3- to anionic chromium(III) and neodymium(III) complexes in aqueous solutions",

abstract = "Cation effects are studied on the excitation energy transfer reaction between anionic complexes, i.e., [Tb(dpa)3]3- (dpa=2,6-pyridinedicarboxylate) quenched by [Cr(ox)3]3- (ox=oxalate ion), [Cr(mal)3]3- (mal=malonate ion) and [Nd(dpa)3]3- in aqueous solutions in the presence of alkali metal ions added for adjustments of ionic strengths. In the quenching reaction of [Cr(ox)3]3-, magnitudes of quenching rate constants (kq) and energy transfer rate constant in encounter complex (k1) are changed by the cations in the order of Li +++≈Rb+≈Cs +, that is quite contrary of the cation effect on energy transfer reaction between [Ru(N-N)3]2+ and [Cr(ox) 3]3-, reported in the previous paper. On the other hand, the rate constants in quenching reactions by [Cr(mal)3]3- and [Nd(dpa)3]3- remain almost constant. This result indicates that more separated donor-acceptor pair is not sensitive to coexisting cations.",

keywords = "Aqueous solution, Complex, Electron transfer, Energy transfer, Quenching, Salt effect",

author = "Munetaka Iwamura and Makoto Morita",

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T1 - Cation effect on energy transfer reactions from [Tb(2,6- pyridinedicarboxylate)3]3- to anionic chromium(III) and neodymium(III) complexes in aqueous solutions

AU - Iwamura, Munetaka

AU - Morita, Makoto

PY - 2004/9/10

Y1 - 2004/9/10

N2 - Cation effects are studied on the excitation energy transfer reaction between anionic complexes, i.e., [Tb(dpa)3]3- (dpa=2,6-pyridinedicarboxylate) quenched by [Cr(ox)3]3- (ox=oxalate ion), [Cr(mal)3]3- (mal=malonate ion) and [Nd(dpa)3]3- in aqueous solutions in the presence of alkali metal ions added for adjustments of ionic strengths. In the quenching reaction of [Cr(ox)3]3-, magnitudes of quenching rate constants (kq) and energy transfer rate constant in encounter complex (k1) are changed by the cations in the order of Li +++≈Rb+≈Cs +, that is quite contrary of the cation effect on energy transfer reaction between [Ru(N-N)3]2+ and [Cr(ox) 3]3-, reported in the previous paper. On the other hand, the rate constants in quenching reactions by [Cr(mal)3]3- and [Nd(dpa)3]3- remain almost constant. This result indicates that more separated donor-acceptor pair is not sensitive to coexisting cations.

AB - Cation effects are studied on the excitation energy transfer reaction between anionic complexes, i.e., [Tb(dpa)3]3- (dpa=2,6-pyridinedicarboxylate) quenched by [Cr(ox)3]3- (ox=oxalate ion), [Cr(mal)3]3- (mal=malonate ion) and [Nd(dpa)3]3- in aqueous solutions in the presence of alkali metal ions added for adjustments of ionic strengths. In the quenching reaction of [Cr(ox)3]3-, magnitudes of quenching rate constants (kq) and energy transfer rate constant in encounter complex (k1) are changed by the cations in the order of Li +++≈Rb+≈Cs +, that is quite contrary of the cation effect on energy transfer reaction between [Ru(N-N)3]2+ and [Cr(ox) 3]3-, reported in the previous paper. On the other hand, the rate constants in quenching reactions by [Cr(mal)3]3- and [Nd(dpa)3]3- remain almost constant. This result indicates that more separated donor-acceptor pair is not sensitive to coexisting cations.

KW - Aqueous solution

KW - Complex

KW - Electron transfer

KW - Energy transfer

KW - Quenching

KW - Salt effect

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