Singlet oxygen O2(1.DELTA.g) bimolecular processes. Solvent and compartmentalization effects

Lissi, E. A.; Encinas, M. V.; Lemp, Else; Rubio, Marı́a A.

doi:10.1021/cr00018a004

Cited by 288 publications

(210 citation statements)

References 117 publications

Supporting

Mentioning

195

Contrasting

Unclassified

Order By: Relevance

“…All the solutions were irradiated with a tungsten lamp at 0.5 mW/cm 2 . 1,3-Diphenylisobenzofuran (DPBF) was used as the singlet oxygen indicator [38]. DPBF reacts rapidly with singlet oxygen to form o-dibenzoylbenzene.…”

Section: Singlet Oxygen Generationmentioning

confidence: 99%

Synthesis and properties of 3-ethynylthiophene containing BODIPY derivatives

2017

View full text Add to dashboard Cite

Section: Singlet Oxygen Generationmentioning

confidence: 99%

Synthesis and properties of 3-ethynylthiophene containing BODIPY derivatives

2017

View full text Add to dashboard Cite

“…The mechanisms of the production of the singlet oxygen in the mesosphere and lower thermosphere and the emission in the infrared atmospheric and atmospheric band nightglow have been studied during a few decades (Llewellyn and Solheim, 1978;Witt et al, 1979;McDade et al, 1986McDade et al, , 1987Kita et al, 1992;Slanger et al, 2000. It is known that the singlet oxygen is very active in the interaction with organic molecules and processes of chemiluminescence (Kearns, 1971;Lissi et al, 1993). The very important role of the singlet oxygen in oncological issues, photodynamic therapy, including the mechanisms of certain human diseases, cell aging and laser cancer treatment was studied by Gomer (1991); Pass (1993);Gal (1994).…”

Section: Electronic Quenching Of the Singlet Oxygen In Colli-mentioning

confidence: 99%

The study of intermolecular energy transfers in electronic energy quenching for molecular collisions N2-N2, N2-O2, O2-O2

Kirillov

2008

Ann. Geophys.

View full text Add to dashboard Cite

Abstract.Contributions of intermolecular electron energy transfers in the electronic quenching are calculated for molecular collisions N 2 (A 3The calculation has allowed one to estimate the product branching ratios. It is shown that there is a dependence of the calculated rate coefficients on the vibrational excitation of N 2 (X 1 + g ) and O 2 (X 3 − g ) molecules. In many cases, the calculated rate coefficients have a good agreement with available experimental data.

show abstract

“…So far, azide ions have been applied, for instance, as quenchers of singlet oxygen [6] and excited triplet states of some organic compounds. It could be anticipated therefore that the energy required to excite lanthanide ions is transferred through the complexing azides.…”

Section: Spectral Distribution Of the Systems: Fe(ιi)/fe(ιii)-sm(ιii)mentioning

confidence: 99%

“…The basic reaction of the method is oxidation of Eu(II) to Eu(III) ions, occurring in complexes with ligand, through hydrogen peroxide and excitation of these ions, which then come down to the ground state emitting characteristic radiation [3]. Products of simultaneous reactions of H 2 O 2 decomposition and radicals recombination are excited dimoles of a singlet state 1O2 [4, 5], whose influence on the level of CL may by determined using quenchers [6]. In literature the often reported quencher of an excited state 1 O2 are azide ions Ν .…”

mentioning

confidence: 99%

Influence of N₃^-Ions on Chemiluminescence of the Eu(II)/Eu(III)-H₂O₂System

et al. 1996

View full text Add to dashboard Cite

The basic system of chemiluminescence investigations of relevant biological and inorganic compounds consists of Εu(II)/Εu(III)-Η2O2 . In these studies the increase in Eu(III) ion emission intensity usually results from an effective complexation reaction. In the present study, the Ν3 ions are used as a ligand. The increase in the chemiluminescence intensity of the Εu(III) ion, the pH influence (in the range of 4.5-7.5) on the chemiluminescence intensity of the Eu(lII) ion, as well as the quenching of the 5D0 excited state of the Εu(IIl) ion are observed due to Ν3 complexation. Taking into account the well-known Fenton system [Fe(II)/Fe(III)-Η2O2], containing additionally the Ν3, Eu(lII) or Sm(llI) ions, we found that the Εu(III) or Sm(III) ions were excited as a result of energy transfer process. A mechanism of the studied reactions is proposed.PACS numbers: 78.60.Ps, 78.55.-m 1. Ιntroduction A chemiluminescence (CL) method is used to study both biological and inorganic compounds in systems containing lanthanide ions, mainly europium [1][2][3]. The basic reaction of the method is oxidation of Eu(II) to Eu(III) ions, occurring in complexes with ligand, through hydrogen peroxide and excitation of these ions, which then come down to the ground state emitting characteristic radiation [3]. Products of simultaneous reactions of H 2 O 2 decomposition and radicals recombination are excited dimoles of a singlet state 1O2 [4, 5], whose influence on the level of CL may by determined using quenchers [6]. In literature the often reported quencher of an excited state 1 O2 are azide ions Ν . So far, the mechanism of 1 O2 emission quenching by Ν3 ions has not been well recognized. While Harbour' and Issler claim that the process of 1 O2 2 quenching proceeds through formation of charge-transfer complex [7], Haag and Mill prove that the dominant reaction in this process is typical physical quenching [8].In our studies incorporation of azide ions, Ν3 , into the Eu(ΙΙ)/Eu(IΙI)-H 2 O 2 system, brings about a strong increase in chemiluminescence emission characteristic of Εu(III) ions. On the basis of both chemiluminescence and fluorescence studies, where particular emphasis was paid to the measurements of a lifetime of 5 D0 Εu(III) ions, a mechanism of chemiluminescence process was proposed.(101)

show abstract

Singlet oxygen O2(1.DELTA.g) bimolecular processes. Solvent and compartmentalization effects

Cited by 288 publications

References 117 publications

Synthesis and properties of 3-ethynylthiophene containing BODIPY derivatives

Synthesis and properties of 3-ethynylthiophene containing BODIPY derivatives

The study of intermolecular energy transfers in electronic energy quenching for molecular collisions N<sub>2</sub>-N<sub>2</sub>, N<sub>2</sub>-O<sub>2</sub>, O<sub>2</sub>-O<sub>2</sub>

Influence of N₃^-Ions on Chemiluminescence of the Eu(II)/Eu(III)-H₂O₂System

Contact Info

Product

Resources

About

Singlet oxygen O2(1.DELTA.g) bimolecular processes. Solvent and compartmentalization effects

Cited by 288 publications

References 117 publications

Synthesis and properties of 3-ethynylthiophene containing BODIPY derivatives

Synthesis and properties of 3-ethynylthiophene containing BODIPY derivatives

The study of intermolecular energy transfers in electronic energy quenching for molecular collisions N&lt;sub&gt;2&lt;/sub&gt;-N&lt;sub&gt;2&lt;/sub&gt;, N&lt;sub&gt;2&lt;/sub&gt;-O&lt;sub&gt;2&lt;/sub&gt;, O&lt;sub&gt;2&lt;/sub&gt;-O&lt;sub&gt;2&lt;/sub&gt;

Influence of N3-Ions on Chemiluminescence of the Eu(II)/Eu(III)-H2O2System

Contact Info

Product

Resources

About

The study of intermolecular energy transfers in electronic energy quenching for molecular collisions N<sub>2</sub>-N<sub>2</sub>, N<sub>2</sub>-O<sub>2</sub>, O<sub>2</sub>-O<sub>2</sub>

Influence of N₃^-Ions on Chemiluminescence of the Eu(II)/Eu(III)-H₂O₂System