Green luminescence of the europium chloride:dimethylformamide charge-transfer complex

Dimitriev, Oleg P.; Kislyuk, V.V.

doi:10.1016/s0009-2614(03)01121-7

Cited by 17 publications

(9 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This green PL of Eu 2+ as a broad maximum at $525-540 nm (300 K) was observed aer reducing of EuCl 3 in dimethylformamide under UV radiation. 42 However, in this case, the formation of the Eu 2+ complex emitting green PL was carried out photochemically rather than by purely chemical reactions as in our case. With regard to the liquid-phase green CL, such examples are non-existent.…”

Section: Resultsmentioning

confidence: 92%

“…40,41 So, it should not be theoretically excluded that a similar Eu 2+ * emission color change from blue through green to red can also be found in solution. To the best of our knowledge, in the literature, there is only one example 42 where the PL of divalent europium in solution is observed in the green region. This green PL of Eu 2+ as a broad maximum at $525-540 nm (300 K) was observed aer reducing of EuCl 3 in dimethylformamide under UV radiation.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

The first registration of a green liquid-phase chemiluminescence of the divalent Eu²⁺* ion in interaction of β-diketonate complexes Eu(acac)₃·H₂O, Eu(dpm)₃, Eu(fod)₃ and Eu(CH₃COO)₃·6H₂O with Buⁱ₂AlH in THF with the participation of oxygen

2015

View full text Add to dashboard Cite

The first liquid-phase green chemiluminescence (CL) of the divalent europium Eu 2+ * at the study of interactions in the systems EuL3•(Н2О)x-THF-Bu i 2AlH-O2 (L = acac, dpm, fod, and CH3COO; x = 0, 1, 6; Bu i = iso-C4H9) was discovered. The attack of Bu i 2AlH on the water of crystallization of complexes EuL3•(Н2О)x affords aluminoxane (Bu i 2Al)2O, hydrogen, and isobutane. The reaction of Bu i 2AlH and EuL3-moiety of the initial Eu 3+ complexes leads to the previously no synthesized divalent europium complexes EuL2•(THF)2, which were isolated and characterized by elemental and spectral analysis in the present work. In the reaction solutions, these complexes are associated in a bulky complexes with an excess of diisobutylaluminum hydride EuL2•(THF)2-Bu i 2AlH. The measured spectra of CL and photoluminescence (PL) of yellow-green reaction solutions in both cases consist of one broad band with λmax = 555±10 nm due to the emission of the electronexcited state of the Eu 2+ * ion (4f 6 5d 1 →4f 7 transition), a part of the bulky complex EuL2•(THF)2-Bu i 2AlH. The lifetime of the excited states, PL, and CL quantum yields of the Eu 2+* ion in the EuL2•(THF)2-Bu i 2AlH complexes were determined. A mechanism ("indirect CL") is proposed to explain the generation of the green CL. The primary emitter triplet-excited isobutyric aldehyde 3 Rշ C(H)=O* (Rշ = iso-C3H7) is formed in the disproportionation reaction of peroxyl radicalsintermediates of Bu i 2AlH oxidation by oxygen. The exited 3 Rշ C(H)=O* molecules transfer energy to Eu 2+ ion converting it into the eleсtronically exited state Eu 2+ *, which is then deactivated by emitting quanta of green light due to the 4f 6 5d 1 →4f 7 transition. It was found that for a divalent Eu 2+ unlike to trivalent Ln 3+ ions, replacement of the inorganic anion-ligand Cl -(complex EuCl2•(THF)2-Bu i 2AlH) with organic one L (complex EuL2•(THF)2-Bu i 2AlH) decreases the CL and PL intensity and leads to the green-shift of the luminescence maximum of Eu 2+* from the blue (λmax = 465 nm) to the green (λmax = 555 nm) region. The high brightness and duration of the CL, visible to the naked eye in the system Eu(fod)3-THF-Bu i 2AlH-O2, make it promising as a chemical source of green light.

show abstract

Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 99%

The first registration of a green liquid-phase chemiluminescence of the divalent Eu²⁺* ion in interaction of β-diketonate complexes Eu(acac)₃·H₂O, Eu(dpm)₃, Eu(fod)₃ and Eu(CH₃COO)₃·6H₂O with Buⁱ₂AlH in THF with the participation of oxygen

2015

View full text Add to dashboard Cite

show abstract

“…The DMF molecules are known to possess high electron donor properties through oxygen of its carbonyl moiety or the tertiary nitrogen . Similarly, urea provides high electron donation capability through two amino groups nitrogen atoms in addition to the carbonyl oxygen.…”

Section: Resultsmentioning

confidence: 99%

Comparative study and multiple linear regression analysis for assessment of chromatographic behavior of structurally related β‐blockers on different stationary phases

Hakiem

Hamdy

Aboraia

2019

J of Separation Science

View full text Add to dashboard Cite

A quantitative structure–retention relationship study was performed by thin layer chromatography on a number of β‐blockers using 315 molecular descriptors of which nine were selected to be having the most important physicochemical properties. These descriptors provide good correlations with chromatographic behavior of the studied structurally related drugs. This research was completed on three pretreated silica gel plates via impregnation in urea, sodium dodecyl sulfate, and dimethylformamide, hence it possesses varying interplay mechanisms and polarities. The retention parameters were obtained by utilizing four solvent systems of two additives of variable ratios, consequently specific polarities in addition to imparted different pH values using either glacial acetic acid or liquid ammonia. Calculated theoretical approaches prove good correlations between investigated descriptors and retention factors. Some correlations show excellent predicting models, which might be critical for toning better know‐how relationships between chemical structures and retention of β‐blockers.

show abstract

“…At UV-treating a ligand is excited, then energy transfers from the ligand to Eu(III)-ion, excited it. The excited Eu(III)-ion emits energy as a light with a certain wavelength [9,21]. So, Citr@EuF 3 colloid intensive luminescence is caused by appearance of Eu(III) complexes.…”

Section: Ir and Luminescence Spectroscopy Elemental Analysismentioning

confidence: 99%

Preparation and colloidal behaviour of surface-modified EuF3

Сафронихин

Shcherba

Ehrlich

et al. 2009

Applied Surface Science

View full text Add to dashboard Cite

Green luminescence of the europium chloride:dimethylformamide charge-transfer complex

Cited by 17 publications

References 16 publications

The first registration of a green liquid-phase chemiluminescence of the divalent Eu²⁺* ion in interaction of β-diketonate complexes Eu(acac)₃·H₂O, Eu(dpm)₃, Eu(fod)₃ and Eu(CH₃COO)₃·6H₂O with Buⁱ₂AlH in THF with the participation of oxygen

The first registration of a green liquid-phase chemiluminescence of the divalent Eu²⁺* ion in interaction of β-diketonate complexes Eu(acac)₃·H₂O, Eu(dpm)₃, Eu(fod)₃ and Eu(CH₃COO)₃·6H₂O with Buⁱ₂AlH in THF with the participation of oxygen

Comparative study and multiple linear regression analysis for assessment of chromatographic behavior of structurally related β‐blockers on different stationary phases

Preparation and colloidal behaviour of surface-modified EuF3

Contact Info

Product

Resources

About

Green luminescence of the europium chloride:dimethylformamide charge-transfer complex

Cited by 17 publications

References 16 publications

The first registration of a green liquid-phase chemiluminescence of the divalent Eu2+* ion in interaction of β-diketonate complexes Eu(acac)3·H2O, Eu(dpm)3, Eu(fod)3 and Eu(CH3COO)3·6H2O with Bui2AlH in THF with the participation of oxygen

The first registration of a green liquid-phase chemiluminescence of the divalent Eu2+* ion in interaction of β-diketonate complexes Eu(acac)3·H2O, Eu(dpm)3, Eu(fod)3 and Eu(CH3COO)3·6H2O with Bui2AlH in THF with the participation of oxygen

Comparative study and multiple linear regression analysis for assessment of chromatographic behavior of structurally related β‐blockers on different stationary phases

Preparation and colloidal behaviour of surface-modified EuF3

Contact Info

Product

Resources

About

The first registration of a green liquid-phase chemiluminescence of the divalent Eu²⁺* ion in interaction of β-diketonate complexes Eu(acac)₃·H₂O, Eu(dpm)₃, Eu(fod)₃ and Eu(CH₃COO)₃·6H₂O with Buⁱ₂AlH in THF with the participation of oxygen

The first registration of a green liquid-phase chemiluminescence of the divalent Eu²⁺* ion in interaction of β-diketonate complexes Eu(acac)₃·H₂O, Eu(dpm)₃, Eu(fod)₃ and Eu(CH₃COO)₃·6H₂O with Buⁱ₂AlH in THF with the participation of oxygen