Synthesis and Spectroscopic Studies of Zirconium(IV) Porphyrins with Acetylacetonate and Phenolates at Axial Positions

Bajju, Gauri D.; Anand, Sunil Kumar; Kundan, Sujata

doi:10.13005/ojc/280157

Cited by 3 publications

(3 citation statements)

References 24 publications

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“…The reaction of Zr-acetylacetone with p -methoxy-meso-tetraphenylporphyrin [ 88 ] and meso-tetraphenylporphyrin [ 89 ] in the presence of phenol and its derivatives in chloroform (conducted at 200–220 °C over a salt bath) resulted in the formation of corresponding axially ligated complexes [Zr( p -OCH 3 TPP)(Y)(X)] and [Zr(TPP)(Y)(X)], where Y = acac and X = phenolates. The coordination number of zirconium in both complexes was reported as seven, and due to the large ionic radius of Zr(IV), the metal is out of the plane of the porphyrin ring.…”

Section: Porphyrins As Ligands For Radiometalsmentioning

confidence: 99%

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Porphyrins as Chelating Agents for Molecular Imaging in Nuclear Medicine

2022

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Porphyrin ligands, showing a significant affinity for cancer cells, also have the ability to chelate metallic radioisotopes to form potential diagnostic radiopharmaceuticals. They can be applied in single-photon emission computed tomography (SPECT) and positron emission tomography (PET) to evaluate metabolic changes in the human body for tumor diagnostics. The aim of this paper is to present a short overview of the main metallic radionuclides complexed by porphyrin ligands and used in these techniques. These chelation reactions are discussed in terms of the complexation conditions and kinetics and the complex stability.

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Section: Porphyrins As Ligands For Radiometalsmentioning

confidence: 99%

“…There is no research on the application of these complexes in nuclear medicine imaging techniques. It was reported that among all the complexes studied, Zr(TPP)(acac)( p -NO 2 PhO) showed the highest antibacterial sensitivity against the bacterial strains [ 88 ].…”

Section: Porphyrins As Ligands For Radiometalsmentioning

confidence: 99%

Porphyrins as Chelating Agents for Molecular Imaging in Nuclear Medicine

2022

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“…The metal ion in these complexes is oxophilic [ 10 ] and thus may show preference for carboxylate and other oxygen-bearing anionic ligands. A lot of work is reported on the complexes of zirconium(IV) phthalocyanines [ 11 – 13 ] but comparatively less work has been done on zirconium(IV) porphyrin complexes with phenol as axial ligand [ 14 , 15 ]. With this background in mind we reported herein the synthesis, spectroscopic characterization, and biological studies of a series of new axially substituted zirconium(IV) porphyrin with phenol and its derivatives as axial ligands.…”

Section: Introductionmentioning

confidence: 99%

Axially Ligated Zirconium(IV) Tetraphenylporphyrin: Synthesis, Characterization, and Biological Activity

Bajju

Anand

Devi

2014

Bioinorganic Chemistry and Applications

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A series of 5,10,15,20-tetraphenylporphinatozirconium(IV) acetylacetonatophenolates containing different phenols as axial ligands [Zr(TPP)(Y)(X)] (TPP = 5,10.15,20-tetraphenyl-21H, 23H-porphine; Y = acac; X = different phenolates) have been synthesized and characterized by various spectrochemical studies. The complexes were also screened for antimicrobial activities. Antifungal activity of some adducts has been carried out against the fungal strain Sclerotium rolfsii. Most of the complexes have shown good antibacterial activity.

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UV, FL and IR spectroscopic analysis of N-confused meso-tetra(methoxyphenyl)porphyrins

Peng

Wang

Cai

et al. 2021

J. Porphyrins Phthalocyanines

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UV, FL and IR spectra of isomer A (in DCM) and isomer B (in DMAc) of N-confused 5,10,15,20-tetra([Formula: see text]-methoxyphenyl)porphyrin ([Formula: see text]-isomer, 1), N-confused 5,10,15,20-tetra([Formula: see text]-methoxyphenyl)porphyrin ([Formula: see text]-isomer, 2) and N-confused 5,10,15,20-tetra([Formula: see text]-methoxyphenyl)porphyrin ([Formula: see text]-isomer,3) were investigated. Significant red shifts are observed from [Formula: see text]-isomer (1) to [Formula: see text]-isomer (3) in UV-vis absorption and fluorescence spectra. The fluorescence lifetime ([Formula: see text] of isomer A and isomer B of the samples (1, 2 and 3) are ca. 1.39[Formula: see text]1.79 ns and 1.68[Formula: see text]2.09 ns, respectively. In addition, the order of fluorescence quantum yield for isomer A is 1 > 2 > 3, but for isomer B it is 1 < 3 < 2. The isomer B of 2shows the strongest emission in accord with the strongest absorption. The isomer A of 1shows the strongest emission with the fluorescence quantum yield of 0.045, which is nearly double that of 3. The introduction of the methoxy group at the orthoposition increases steric hindrance, the molecular rigidity and the flow of [Formula: see text]-electron, thereby favourable to the fluorescence enhancement. The IR absorption peaks of 1, 2 and 3 were investigated and empirically assigned. The effects of the position of the substituents on the absorption frequency were also discussed. The absorption frequency of the C=C phenyl stretching in plane changed obviously by conjugative effect and steric effect when the methoxy group was at the orthoormetaposition in comparison with paraposition.

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Synthesis and Spectroscopic Studies of Zirconium(IV) Porphyrins with Acetylacetonate and Phenolates at Axial Positions

Cited by 3 publications

References 24 publications

Porphyrins as Chelating Agents for Molecular Imaging in Nuclear Medicine

Porphyrins as Chelating Agents for Molecular Imaging in Nuclear Medicine

Axially Ligated Zirconium(IV) Tetraphenylporphyrin: Synthesis, Characterization, and Biological Activity

UV, FL and IR spectroscopic analysis of N-confused meso-tetra(methoxyphenyl)porphyrins

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