Novel, highly photoluminescent Eu(III) and Tb(III) tetrazolate-2-pyridine-1-oxide complexes

Pietraszkiewicz, Marek; Mal, Suraj; Pietraszkiewicz, Oksana

doi:10.1016/j.optmat.2012.02.039

Cited by 14 publications

(26 citation statements)

References 43 publications

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“…1) similar to those reported previously (18)(19)(20). 1) similar to those reported previously (18)(19)(20).…”

Section: Synthesis Of the Ln(iii) Complexessupporting

confidence: 92%

“…The shorter lifetime of complex 1 can be attributed to high vibronic oscillations (-OH group) shown by water coordinated to the Eu(III) ion, which reduces radiative decay and promotes faster non-radiative decay (18,33). The longer lifetime (τ obs ) observed for complexes 3 (1.450 ± 0.0196 ms) and 4 (1.101 ± 0.0182 ms) compared with complex 1 (0.350 ± 0.0105 ms) also proves that water molecules have been displaced from the coordination sphere of the central Eu(III) ion, which is responsible for the higher radiative decay seen in complexes 3 and 4.…”

Section: Uv Absorbance and Pl Studiesmentioning

confidence: 99%

“…The singlet and triplet values of HPTO were measured and calculated using Gd(PTO) 3 (complex 2), as described previously (18)(19)(20) (Figs S3 and S4). mechanism (Fig.…”

Section: Uv Absorbance and Pl Studiesmentioning

confidence: 99%

“…Acidic analogues of carboxylic acid, so-called 'tetrazoles', have not been used much in sensitization processes; to date, only a few articles have been published related to the PL of tetrazolates compared with that of lanthanide ions (15)(16)(17)(18)(19)(20)(21)(22). Acidic analogues of carboxylic acid, so-called 'tetrazoles', have not been used much in sensitization processes; to date, only a few articles have been published related to the PL of tetrazolates compared with that of lanthanide ions (15)(16)(17)(18)(19)(20)(21)(22).…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and photophysical studies of tetrazolate‐based Eu(III) photoluminescent ternary complexes containing N‐heterocyclic phosphine oxides auxiliary co‐ligands

Mal

Pietraszkiewicz

2015

Luminescence

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Two new ternary tetrazolate Eu(III) complexes with phosphine oxide co-ligands Eu(PTO)3 ·(P1/P2) [PTO = 5-(2-pyridyl-1-oxide)tetrazole, P1 = diphenylphosphorylamino-phenylphosphoryl-benzene, P2 = diphenylphosphorylpyridine)-bis-isobutyricphosphoryl] were synthesized and characterized using UV, fluorescence, IR and (1) H NMR spectroscopic techniques. The analytical data prove that the complexes are mononuclear in nature and the central Eu(III) ion is coordinated by three N and three O atoms of tetrazolate, and two O atoms of the corresponding bidentate phosphine oxide ligands. The ancillary ligand increased the photoluminescence efficiency of Eu(PTO)3 ·P1 (complex 3) by twofold compared with our previously reported Eu(PTO)3 complex (complex 1). Copyright © 2015 John Wiley & Sons, Ltd.

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“…1) similar to those reported previously (18)(19)(20). 1) similar to those reported previously (18)(19)(20).…”

Section: Synthesis Of the Ln(iii) Complexessupporting

confidence: 92%

Section: Uv Absorbance and Pl Studiesmentioning

confidence: 99%

“…The singlet and triplet values of HPTO were measured and calculated using Gd(PTO) 3 (complex 2), as described previously (18)(19)(20) (Figs S3 and S4). mechanism (Fig.…”

Section: Uv Absorbance and Pl Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis and photophysical studies of tetrazolate‐based Eu(III) photoluminescent ternary complexes containing N‐heterocyclic phosphine oxides auxiliary co‐ligands

Mal

Pietraszkiewicz

2015

Luminescence

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“…Recently, we explored and reported on the carboxylate analogue, i.e. tetrazolates lanthanide complexes and their photo‐physical properties . The tris‐pyridineoxide tetrazolate europium(III) complex exhibited 13% PL quantum yields in solution which can be attributed to the coordinated water molecules to the central europium(III) ion causing vibrational quenching.…”

Section: Introductionmentioning

confidence: 99%

Luminescent studies of binuclear ternary europium(III) pyridineoxide tetrazolate complexes containing bis‐phosphine oxide as auxiliary co‐ligands

Mal

Pietraszkiewicz

2017

Luminescence

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A new class of antenna chromophores so called 'tetrazolates' have not been explored much for lanthanide luminescencent complexes. However, we have already published several articles considering pyridineoxide tetrazolates as sensitizer with lanthanide ions. Although this class of antenna attracted much less attention because of its poor photoluminescence quantum yields (tris-pyridineoxide tetrazolate europium complex = 13% in solution) we tried and successfully achieved to improve the photoluminescence quantum yields for this particular antenna molecule by replacing coordinated water from the inner coordination sphere of europium ion by introducing phosphine oxides as additional chromophore. In the present article the two bis-phosphine oxides attach two molecules of tris-pyridineoxide tetrazolate europium(III) complex which leads to the improvement of the overall molar absorption coefficients as well as photo-physical properties of the complexes. We found more than two-fold increase (31% in solution) in photoluminescence quantum yield with one of the coordinated phosphine oxides comparing with that of tris-pyridineoxide tetrazolate europium(III) complex.

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Tunable Emissive Lanthanidomesogen Derived from a Room‐Temperature Liquid‐Crystalline Schiff‐Base Ligand

Pramanik

Das

Bhattacharjee

et al. 2013

Chemistry A European J

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A novel photoluminescent room-temperature liquid-crystalline salicylaldimine Schiff base with a short alkoxy substituent and a series of lanthanide(III) complexes of the type [Ln(LH)3(NO3)3] (Ln = La, Pr, Sm, Gd, Tb, Dy; LH = (E)-5-(hexyloxy)-2-[{2-(2-hydroxyethylamino)ethylimino]methyl}phenol) have been synthesized and characterized by FTIR, (1)H and (13)C NMR, UV/Vis, and FAB-MS analyses. The ligand coordinates to the metal ions in its zwitterionic form. The thermal behavior of the compounds was investigated by polarizing optical microscopy (POM) and differential scanning calorimetry (DSC). The ligand exhibits an enantiotropic hexagonal columnar (Col(h)) mesophase at room temperature and the complexes show an enantiotropic lamellar columnar (Col(L)) phase at around 120 °C with high thermal stability. Based on XRD results, different space-filling models have been proposed for the ligand and complexes to account for the columnar mesomorphism. The ligand exhibits intense blue emission both in solution and in the condensed state. The most intense emissions were observed for the samarium and terbium complexes, with the samarium complex glowing with a bright-orange light (ca. 560-644 nm) and the terbium complex emitting green light (ca. 490-622 nm) upon UV irradiation. DFT calculations performed by using the DMol3 program at the BLYP/DNP level of theory revealed a nine-coordinate structure for the lanthanide complexes.

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Novel, highly photoluminescent Eu(III) and Tb(III) tetrazolate-2-pyridine-1-oxide complexes

Cited by 14 publications

References 43 publications

Synthesis and photophysical studies of tetrazolate‐based Eu(III) photoluminescent ternary complexes containing N‐heterocyclic phosphine oxides auxiliary co‐ligands

Synthesis and photophysical studies of tetrazolate‐based Eu(III) photoluminescent ternary complexes containing N‐heterocyclic phosphine oxides auxiliary co‐ligands

Luminescent studies of binuclear ternary europium(III) pyridineoxide tetrazolate complexes containing bis‐phosphine oxide as auxiliary co‐ligands

Tunable Emissive Lanthanidomesogen Derived from a Room‐Temperature Liquid‐Crystalline Schiff‐Base Ligand

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