Study of Structure−Properties Relationship for Lanthanide Tetrapyrrolic Macrocycles Modified with Aminopolycarboxylate Substituents

Semenishyn, Nikolay; Русакова, Н. В.

doi:10.6060/mhc160425r

Cited by 4 publications

(4 citation statements)

References 24 publications

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“…[20] Nevertheless, neither peripheral porphyrin complexes nor corrole ones reveal any 4f-luminescent sensitivity to the presence of oxygen under different conditions. [26] 4f-Luminescence is observed in all of the studied erbium complexes as a result of the intramolecular excitation energy transfer. Mononuclear core-coordinated complexes tppEr(acac) and [(15C5) 4 Pc]Er[(4-BrC 6 H 4 ) 4 Por] have the highest luminescence efficiency especially owing to the participation of the coordinated lanthanide ion in the population of the T-state by enhancing the intersystem crossing (ISC) in the tetrapyrrole chromophore due to an external heavy atom effect.…”

Section: Comparison Of the Fluorescent And 4f-luminescent Propertiesmentioning

confidence: 92%

Infrared 4f-Luminescence of Erbium(III) Complexes with Tetrapyrrole Ligands

Semenishyn¹,

Smola²,

Русакова³

et al. 2018

MHC

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The luminescent properties of the series of erbium(III) complexes of various coordination types with different tetrapyrrole macrocycles (porphyrins, phthalocyanines and corroles) are discussed in this paper. The investigated series of compounds include mononuclear porphyrinato complexes (metal-ligand ratio 1:1, tppEr(acac)), sandwich phthalocyaninato-porphyrinato type complexes (metal-ligand ratio 1:2 [(15C5) 4 Pc]Er[(4-BrC 6 H 4) 4 Por] or 2:3-(Pc) Er[(15C5) 4 Pc]Er(Pc) and [(15C5) 4 Pc]Er[(15C5) 4 Pc]Er(Pc)), ditopic porphyrins and corroles possessing peripheral lanthanides binding (metal-ligand ratio 1:1, Er-edta-H 2 atpp•2H 2 O, Er-Hdtpa-H 2 atpp, Er-edta-H 3 dpfc•2H 2 O and Er-Hdtpa-H 3 dpfc). 4f-Luminescence in the near-infrared region is observed in all studied Er-complexes as a result of intramolecular transfer of excitation energy. The unique features of each type of complexes are discussed in details. The peripheral complexes are dual-emissive: they display both erbium(III) 4f-emission in near-infrared and molecular fluorescence in the visible spectral region. The values of quantum yield of molecular fluorescence as well as the intensity of 4f-luminescence are estimated. It was found that the binding type of erbium(III) plays a key role in the macrocycle excited state relaxation. The doubledecker heteroleptic complex [(15C5) 4 Pc]Er[(4-BrPh) 4 Por] possesses unusual emission behaviour.

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Section: Comparison Of the Fluorescent And 4f-luminescent Propertiesmentioning

confidence: 92%

Infrared 4f-Luminescence of Erbium(III) Complexes with Tetrapyrrole Ligands

Semenishyn¹,

Smola²,

Русакова³

et al. 2018

MHC

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“…Table 1 It can be assumed that in theory, the 4f-sensitization of Yb 3+ ion can pass through two transitions: the traditional Т 1 → 2 F 5/2 and presumably S 1 → 2 F 5/2 . [28]. The low level of the Yb 3+ 4f-luminescent signal in such compounds is attributed to poor contribution of the Т 1 → 4 F 3/2 transition in 4f-sensitization mechanism for both compounds 5 and 6.…”

Section: Introductionmentioning

confidence: 91%

4f-LUMINESCENCE OF LANTHANIDE IONS IN REGIOISOMERIC CORROLE COMPLEXES

et al. 2021

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Isomeric ditopic corroles and complexes of Yb (III), Nd (III) and Er (III) based on them were synthesized and corrole-photosensitized 4f-luminescence in near infrared region was revealed. The structure of isomeric complexes allows adjusting the distance between the corrole core and lanthanide ion. The obtained results show that the sensitization mechanism changes drastically for both different lanthanides and isomeric forms.

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“…The field has been reviewed regularly since the turn of the century, 32,256,260,[270][271][272][273][274] including applications to bioanalysis and bioimaging. [275][276][277][278] In some instances, polyaminocarboxylic acid groups 115,279 or tris(dipicolinates) 213 have been attached to porphyrins or to their transition metal complexes (M = Zn, Pd, Pt); the flexibility of the resulting assemblies is large enough to bring the Ln III ions close to the porphyrin core which then can sensitize their luminescence. Such work is not discussed in detail here.…”

Section: Nir-emissive Lanthanide-porphyrin Complexesmentioning

confidence: 99%

“…20). 114,115 The Wong group designed porphyrin with an appended bdiketonate which would help fulfil the Ln III coordination requirements in addition to the porphyrin N atoms (Fig. 21).…”

Section: Introductionmentioning

confidence: 99%