Mild Conditions for Oxidation/Epoxidation of Styrene

Starting from 2,2′,6,6′‐tetra‐isopropylbenzidine (TBZ), a family of sterically encumbered pseudo‐C2‐symmetric based ligand systems and supramolecular building blocks have been synthesized. Schiff base scaffolds (iPr)4(C6H2)2(NAr′)2 (1‐9) (Ar′=‐CH(C6H4)(OH) (1); ‐CH(C6H2)(Me)2(OH) (2); ‐CH(C6H2)(tBu)2(OH) (3); ‐CH(C6H2)(tBu)(Br)(OH) (4); ‐CH(C6H3)(OMe)(OH) (5); ‐CH(C6H4)(4‐OH) (6); ‐CH(2‐Py) (7); ‐CH(3‐Py) (8); ‐CH(4‐Py) (9)), (iPr)4(C6H2)2(NH(C)(CH)(CO)Me2)2 (10), (NH2(iPr)4(C6H2)2)2(N(C)(CH)(C)N)Me2 (11), (NH2(iPr)4(C6H2)2N(CO)(C6H4)(CH2) (12) and (iPr)4(C6H2)2(N(CO)(C6H4)(CH2))2 (13) have been assembled through condensation of TBZ with the corresponding formyl compounds. TBZ was also further employed to synthesize two carboxylic acid derivatives, ((iPr)4(C6H2)2(N(CH2COOH)2)2) (14) and ((iPr)4(C6H2)2(COOH)2) (16), both potential connector ligands for MOFs. To explore main group chemistry aspects of TBZ, bis‐ and tetra‐trimethylsilyl derivatives (iPr)4(C6H2)2(R)2 (R=(‐NH(SiMe3))2 (17) and (‐N(SiMe3)2)2 (18)) have been synthesized. The bis‐dichlorophosphine derivative ((iPr)4(C6H2)2(N(PCl2)2)2) (19), a compound with promising chemistry for P‐based covalent organic frameworks, has been synthesized by a solvent‐free reaction of TBZ with excess PCl3.

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2,2′,6,6′‐Tetraisopropylbenzidine‐Based Sterically Encumbered Ditopic C₂‐Symmetric Ligand Systems and Supramolecular Building Blocks

Jangir

Kaleeswaran

Murugavel

2018

ChemistrySelect

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The Effect of Surface Morphology of Silver Nanoparticles on the Selectivity of Styrene Epoxidation

Sarıbıyık

2022

NANO

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Catalytic materials at the nanoscale level have an enormous impact on sustainable environmental protection, which is important for the future. Therefore, the researchers will intensively carry out the design of catalytic materials with well-ordered surface structures. In more detail, morphology-controlled nanoparticles have special interactions with the reactants that increase catalytic performance and influence the selectivity for catalytic reactions. For those reasons, obtaining specifically surface structure-tuned nanocrystals having different surface arrangements is a significant priority that promises the best model relationship between well-oriented surface structure and catalytic performance. In this study, silver nanocrystals shaped with cubes, truncated octahedrons, and octahedrons were produced. Their catalytic behaviors were examined as an innovation for epoxidation/oxidation reactions of styrene in mild conditions. The morphological and surface characterizations of nanocrystals were determined by analytical and instrumental methods such as high-resolution transmission electron microscopy energy dispersive X-ray (HR-TEM-EDX), X-ray diffraction (XRD), as well as inductively coupled plasma mass spectroscopy optical emission spectrometry (ICP-OES), and gas chromatography-mass spectrometry (GC-MS). According to the results, nanoparticles having different surface-facets fractions can be employed to increase the selectivity of styrene epoxide.

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Mild Conditions for Oxidation/Epoxidation of Styrene

Cited by 2 publications

References 39 publications

2,2′,6,6′‐Tetraisopropylbenzidine‐Based Sterically Encumbered Ditopic C₂‐Symmetric Ligand Systems and Supramolecular Building Blocks

2,2′,6,6′‐Tetraisopropylbenzidine‐Based Sterically Encumbered Ditopic C₂‐Symmetric Ligand Systems and Supramolecular Building Blocks

The Effect of Surface Morphology of Silver Nanoparticles on the Selectivity of Styrene Epoxidation

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Mild Conditions for Oxidation/Epoxidation of Styrene

Cited by 2 publications

References 39 publications

2,2′,6,6′‐Tetraisopropylbenzidine‐Based Sterically Encumbered Ditopic C2‐Symmetric Ligand Systems and Supramolecular Building Blocks

2,2′,6,6′‐Tetraisopropylbenzidine‐Based Sterically Encumbered Ditopic C2‐Symmetric Ligand Systems and Supramolecular Building Blocks

The Effect of Surface Morphology of Silver Nanoparticles on the Selectivity of Styrene Epoxidation

Contact Info

Product

Resources

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2,2′,6,6′‐Tetraisopropylbenzidine‐Based Sterically Encumbered Ditopic C₂‐Symmetric Ligand Systems and Supramolecular Building Blocks

2,2′,6,6′‐Tetraisopropylbenzidine‐Based Sterically Encumbered Ditopic C₂‐Symmetric Ligand Systems and Supramolecular Building Blocks