Employing Aryl‐Linked Bis‐mesoionic Carbenes as a Pincer‐Type Platform to Access Ambient‐Stable Palladium(IV) Complexes

Yan, Xuechao; Wang, Haiying; Guo, Shuai

doi:10.1002/ange.201911180

Cited by 4 publications

(1 citation statement)

References 59 publications

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“…In general, they have stronger electron donor characteristics when in coordination with transition metals compared with their well-known five-membered NHC counterparts. [44][45][46][47] Simultaneously, MIC-metal complexes were found not only to exhibit extraordinary catalytic ability for a variety of chemical transformation reactions, 48 but also to have a wide range of applications in photophysics, 49 medicinal chemistry, and many other fields. 50,51 Although the number of MIC-metal complexes has increased rapidly during the past decade, only a few such complexes featuring monoor bidentate MIC ligands with attractive optical features have been demonstrated to date.…”

Section: Introductionmentioning

confidence: 99%

Multistimuli-Responsive Fluorescent Organometallic Assemblies Based on Mesoionic Carbene-Decorated Tetraphenylethene Ligands and Their Applications in Cell Imaging

Yang

et al. 2022

CCS Chem

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The controllable construction of light-emitting organometallic supramolecular materials integrating stimulus responses and biological applications is still a major challenge today. In this work, emissive organometallic assemblies based on Ag I /Au I and mesoionic carbene-decorated tetraphenylethene (MIC-TPE) ligands have been synthesized and characterized. Photophysical studies showed that these organometallic assemblies [M 4 (2) 2 ](OTf) 4 not only fluoresce in various dilute solutions, resulting from the rigidification of MIC-TPE ligands upon complexation, but also show tunable fluorescence wavelengths and intensity behaviors in mixed solvent systems and at varying temperatures while in solution, and mechanical pressure stimulus-responsive fluorescent features in the solid state. Furthermore, the organometallic cages [M 4 (2) 2 ](OTf) 4 (M = Ag and Au) were successfully employed for cell imaging and showed the potential of anticancer activity, making them promising candidates for cancer theranostics. This work provides a simple and efficient method to prepare highly emissive and stimulus-responsive organometallic materials and paves the way for related biological applications such as cancer cell imaging and targeted therapy.

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Section: Introductionmentioning

confidence: 99%

Multistimuli-Responsive Fluorescent Organometallic Assemblies Based on Mesoionic Carbene-Decorated Tetraphenylethene Ligands and Their Applications in Cell Imaging

Yang

et al. 2022

CCS Chem

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Synthesis of Well‐Defined High‐Valent Palladium Complexes by Oxidation of Their Palladium(II) Precursors

Zhang

Yan

Guo

2020

Chemistry A European J

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The last decade has witnessed the rapid development of high‐valent Pd‐involved organic transformations. This has also led to a steadily growing number of publications concerning the preparation of isolable and characterizable palladium(III) and palladium(IV) complexes. A variety of one‐electron and two‐electron oxidants have been employed to give access to high‐oxidation‐state Pd compounds. Undoubtedly, the study of these stoichiometric reactions has great implications for relevant Pd‐mediated catalysis. In this minireview, the focus is on the synthetic approaches to structurally determined PdIII/IV complexes starting from their PdII precursors, and the advances in this research area from early 2010 to late 2019 will be highlighted. Chemical oxidations exploiting various oxidizing agents including 1) hypervalent iodine reagents; 2) halogens; 3) electrophilic fluorination reagents; 4) alkyl/aryl halides; 5) ferrocenium salts; 6) peroxides/O2; 7) sulfonyl chlorides; and 8) others are covered. A “greener” electrooxidation manner has also been reviewed.

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The Fluoride Method: Access to Silver(III) NHC Complexes

Pueyo,

Joven‐Sancho,

Martín

et al. 2024

Chemistry A European J

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We have synthesized the first silver(III) carbene complexes, (CF3)3Ag(NHC), by direct reaction of the silver(III) fluoride precursor complex [PPh4][(CF3)3AgF] with different imidazolium salts. This novel methodology circumvents the use of free NHC molecules. The silver(III) carbene complexes thus prepared are unprecedented and show remarkable thermal stabilities. They display square‐planar or square‐pyramidal geometry. Following our calculations, the electronic structure of a model representative complex exhibits Inverse Ligand Field (ILF). The compounds reported herein are synthetic analogues of the elusive difluorocarbene and carbonyl species proposed as intermediates in the acidic decomposition of [Ag(CF3)4]−. The synthetic procedure reported is envisaged to enable access to carbene complexes of other late transition‐metals in high oxidation states.

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Employing Aryl‐Linked Bis‐mesoionic Carbenes as a Pincer‐Type Platform to Access Ambient‐Stable Palladium(IV) Complexes

Cited by 4 publications

References 59 publications

Multistimuli-Responsive Fluorescent Organometallic Assemblies Based on Mesoionic Carbene-Decorated Tetraphenylethene Ligands and Their Applications in Cell Imaging

Multistimuli-Responsive Fluorescent Organometallic Assemblies Based on Mesoionic Carbene-Decorated Tetraphenylethene Ligands and Their Applications in Cell Imaging

Synthesis of Well‐Defined High‐Valent Palladium Complexes by Oxidation of Their Palladium(II) Precursors

The Fluoride Method: Access to Silver(III) NHC Complexes

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