Platin(II)‐Komplexe mit Bis(pyrazolyl)boratliganden: Gesteigerte molekulare Rigidität bei zweizähnigen Ligandsystemen

Soellner, Johannes; Pinter, Piermaria; Stipurin, Sergej; Straßner, Thomas

doi:10.1002/ange.202011927

Angewandte Chemie

2020

DOI: 10.1002/ange.202011927

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Platin(II)‐Komplexe mit Bis(pyrazolyl)boratliganden: Gesteigerte molekulare Rigidität bei zweizähnigen Ligandsystemen

Johannes Soellner

Piermaria Pinter

Sergej Stipurin

et al.

Abstract: Platin(II)‐Komplexe mit cyclometallierten N‐heterocyclischen Carbenliganden können verwendet werden, um tiefblaue Emitter zur Anwendung in organischen Leuchtdioden zu entwickeln. Die photophysikalischen Eigenschaften der resultierenden Moleküle sind jedoch auch stark abhängig von dem eingesetzten Hilfsliganden. Im angeregten Zustand erlauben diese oft Moleküldeformationen, die zu strahlungslosen Relaxationsprozessen führen und damit die erreichbare Quantenausbeute schmälern. Die Verwendung von auf Bis(pyrazoly… Show more

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Cited by 4 publications

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Trinuclear Organometallic Pt−Ir−Pt Complexes: Insights into Photophysical Properties, Amino Acid Binding and Protein Sensing

Das

Gupta

2021

Chemistry An Asian Journal

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The rational synthesis of trinuclear emissive organometallic complexes with two equivalent platinum(II) centres appended to the ancillary substituted 2,2′‐bipyridyl ligand of the cyclometalated iridium(III) centre is reported here. The alkynyl‐platinum moiety and cyclometalated iridium(III) centres have been separated through a non‐conjugated CH2−O−CH2 linkage. The emission titration with amino acids reveals that the complexes sense free amino acids. The luminescence sensing of BSA is thus attributed to the amino acid sensing ability of the complexes and confirmed by emission anisotropy and Far‐UV CD spectral study. The decrease in α‐helix in the CD spectra signifies the changes in the secondary structure of protein in presence of the complexes.

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Trinuclear Organometallic Pt−Ir−Pt Complexes: Insights into Photophysical Properties, Amino Acid Binding and Protein Sensing

Das

Gupta

2021

Chemistry An Asian Journal

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Phosphorescent Bimetallic C^C* Platinum(ii) Complexes with Bridging Substituted Diphenylformamidinates

Stipurin

Straßner

2022

Chemistry A European J

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A series of phosphorescent bimetallic platinum(II) complexes is presented, which were synthesized by the combination of bidentate cyclometalated N-heterocyclic carbene ligands and different bridging diphenylformamidinates. The complexes were characterized by standard techniques and additionally two solid-state structures could be obtained. Photoluminescence measurements revealed the strong emissive behavior of the compounds with quantum yields of up to 90 % and emission lifetimes of approx. 2 μs. The effect of the substitution pattern in the bridging ligands on the structural and photophysical properties of the complexes was examined in detail and rationalized by density functional theory calculations (PBE0/6-311G*).

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Electronic Structure and Magnetic Properties of a High‐Spin Mn^IIIComplex: [Mn(mesacac)₃] (mesacac=1,3‐Bis(2,4,6‐trimethylphenyl)‐propane‐1,3‐dionato)

et al. 2022

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Metal acetylacetonates of the general formula [M(acac) 3 ] (M III = Cr, Mn, Fe, Co) are among the best investigated coordination compounds. Many of these first-row transition metal complexes are known to have unique electronic properties. Independently, photophysical research with different β-diketonate ligands pointed towards the possibility of a special effect of the 2,4,6trimethylphenyl substituted acetylacetonate (mesacac) on the electron distribution between ligand and metal (MLCT). We therefore synthesized and fully characterized the previously unknown octahedral title complex. Its solid-state structure shows a Jahn-Teller elongation with two MnÀ O bonds of 2.12/ 2.15 Å and four MnÀ O bonds of 1.93 Å. Thermogravimetric data show a thermal stability up to 270 °C. High-resolution mass spectroscopy helped to identify the decomposition pathways. The electronic state and spin configuration of manganese were characterized with a focus on its magnetic properties by measurement of the magnetic susceptibility and triple-zeta density functional theory (DFT) calculations. The high-spin state of manganese was confirmed by the determination of an effective magnetic moment of 4.85 μ B for the manganese center.

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Platin(II)‐Komplexe mit Bis(pyrazolyl)boratliganden: Gesteigerte molekulare Rigidität bei zweizähnigen Ligandsystemen

Cited by 4 publications

References 53 publications

Trinuclear Organometallic Pt−Ir−Pt Complexes: Insights into Photophysical Properties, Amino Acid Binding and Protein Sensing

Trinuclear Organometallic Pt−Ir−Pt Complexes: Insights into Photophysical Properties, Amino Acid Binding and Protein Sensing

Phosphorescent Bimetallic C^C* Platinum(ii) Complexes with Bridging Substituted Diphenylformamidinates

Electronic Structure and Magnetic Properties of a High‐Spin Mn^IIIComplex: [Mn(mesacac)₃] (mesacac=1,3‐Bis(2,4,6‐trimethylphenyl)‐propane‐1,3‐dionato)

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Platin(II)‐Komplexe mit Bis(pyrazolyl)boratliganden: Gesteigerte molekulare Rigidität bei zweizähnigen Ligandsystemen

Cited by 4 publications

References 53 publications

Trinuclear Organometallic Pt−Ir−Pt Complexes: Insights into Photophysical Properties, Amino Acid Binding and Protein Sensing

Trinuclear Organometallic Pt−Ir−Pt Complexes: Insights into Photophysical Properties, Amino Acid Binding and Protein Sensing

Phosphorescent Bimetallic C^C* Platinum(ii) Complexes with Bridging Substituted Diphenylformamidinates

Electronic Structure and Magnetic Properties of a High‐Spin MnIIIComplex: [Mn(mesacac)3] (mesacac=1,3‐Bis(2,4,6‐trimethylphenyl)‐propane‐1,3‐dionato)

Contact Info

Product

Resources

About

Electronic Structure and Magnetic Properties of a High‐Spin Mn^IIIComplex: [Mn(mesacac)₃] (mesacac=1,3‐Bis(2,4,6‐trimethylphenyl)‐propane‐1,3‐dionato)