Kinetic trans effect in square planar transition metal complexes

Vanquickenborne, L. G.; Vranckx, J.; Goeller-Walrand, C.

doi:10.1021/ja00820a010

Cited by 20 publications

(12 citation statements)

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“…In the GO lattice structure, the carbon atoms were bonded either to the carbon forming C-C conjugation (284.5) or to the oxygen forming carboxyl (288.6 eV), carbonyl (287.4 eV) and hydroxyl (285.6 eV) functional groups. These assignments are in qualitative agreement with those in literature even though there is certain vagueness in exact binding energy value determination for individual components [16][17][18][19][20][21]. For both GO and rGO, the asymmetry of the C-C peak was observed, which was probably related to the screening of the core holes left by photoelectrons.…”

Section: Properties Of Graphene Materialssupporting

confidence: 89%

Immobilized rGO/TiO<sub>2</sub> Photocatalyst for Decontamination of Water

Žouželka¹,

Remzova²,

Plšek³

et al. 2019

Preprint

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The preparation of immobilized graphene–based photocatalyst layers is highly desired for environmental applications. In this study, the preparation of an immobilized reduced graphene oxide (rGO)/TiO2 composite by electrophoretic deposition (EPD) was optimized. It enabled quantitative deposition without sintering and without the use of any dispersive additive. The presence of rGO had beneficial effects on the photocatalytic degradation of 4-chlorophenol in an aqueous solution. A marked increase in the photocatalytic degradation rate was observed, even at very low concentrations of rGO. Compared with the TiO2 and GO/TiO2 reference layers, use of the rGO/TiO2 composite (0.5 wt% of rGO) increased the first-order reaction rate constant by about 70%. This enhanced performance was due to the increased formation of hydroxyl radicals that attacked the 4-chlorophenol molecules. The direct charge transfer mechanism had only limited effect on the degradation. Thus, EPD-prepared rGO/TiO2 layers appear to be suitable for environmental application.

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Section: Properties Of Graphene Materialssupporting

confidence: 89%

Immobilized rGO/TiO<sub>2</sub> Photocatalyst for Decontamination of Water

Žouželka¹,

Remzova²,

Plšek³

et al. 2019

Preprint

View full text Add to dashboard Cite

show abstract

“…In the GO lattice structure, the carbon atoms were bonded either to the carbon-forming C-C conjugation (284.5 eV) or to the oxygen-forming carboxyl (288.6 eV), carbonyl (287.4 eV), and hydroxyl (285.6 eV) functional groups. These assignments are in qualitative agreement with those in the literature, even though there is a certain vagueness in the exact binding energy value determination for individual components [34][35][36][37][38][39]. For both GO and rGO, the asymmetry of the C-C peak was observed, which was probably related to the screening of the core holes left by photoelectrons.…”

Section: Properties Of Graphene Materialssupporting

confidence: 88%

Immobilized rGO/TiO2 Photocatalyst for Decontamination of Water

et al. 2019

View full text Add to dashboard Cite

The preparation of immobilized graphene-based photocatalyst layers is highly desired for environmental applications. In this study, the preparation of an immobilized reduced graphene oxide (rGO)/TiO2 composite by electrophoretic deposition (EPD) was optimized. It enabled quantitative deposition without sintering and without the use of any dispersive additive. The presence of rGO had beneficial effects on the photocatalytic degradation of 4-chlorophenol in an aqueous solution. A marked increase in the photocatalytic degradation rate was observed, even at very low concentrations of rGO. Compared with the TiO2 and GO/TiO2 reference layers, use of the rGO/TiO2 composite (0.5 wt% of rGO) increased the first-order reaction rate constant by about 70%. This enhanced performance was due to the increased formation of hydroxyl radicals that attacked the 4-chlorophenol molecules. The direct charge transfer mechanism had only limited effect on the degradation. Thus, EPD-prepared rGO/TiO2 layers appear to be suitable for environmental application.

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“…These are the longest Pt-S bonds observed for any of the complexes described herein, but are consistent with three other structures containing the It has long been known that there are two phenomena at play in square planar Pt complexes, where a ligand X, trans to another ligand A, affects the stability of the Pt-A bond (trans-influence) or the ease of substitution of A (kinetic trans-effect). 41,42 It was verified experimentally that the labilizing effect (kinetic trans-effect) decreases in the following order:…”

Section: Figure 5 the Molecular Structure Of Pt(ms S S S )-P-tol-bmentioning

confidence: 96%

Synthesis, Structure, and Catalytic Studies of Palladium and Platinum Bis-Sulfoxide Complexes

Drinkel

Linden

et al. 2013

Organometallics

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The bis-sulfoxide ligand p-tolyl-binaso and its derivatives can be used to synthesize neutral and cationic palladium and platinum complexes. Various Pt bis-sulfoxide complexes could be made by using the precursor Pt(M,SS,SS)-p-tolyl-binasoCl2 (5a) and abstracting the chlorides with silver salts. The Pd analogue of this compound (4) could not be used in the same way. In this case, the sulfoxides appear to be very weakly coordinated and different methods to make stable Pd bis-sulfoxide complexes had to be found. The nature of the bonding in the synthesized compounds was studied through analysis of their IR and NMR spectra and X-ray crystal structures. These studies revealed that the trans effect of other ligands in the complex is quite significant in determining the lability of the metal-sulfoxide bond. Some of the more stable platinum structures were then tested for their activity as catalysts in hydroboration and diboration reactions. AbstractThe bissulfoxide ligand, p-tolyl-binaso and its derivatives can be used to synthesize neutral and cationic palladium and platinum complexes. Various Pt bissulfoxide complexes could be made by using the precursor Pt{(M,S S ,S S )-p-tolyl-binaso}Cl 2 (5a) and abstracting the chlorides with silver salts. The Pd analogue of this compound (4) could not be used in the same way. In this case, the sulfoxides appear to be very weakly coordinated and different methods to make stable Pd bissulfoxide complexes had to be found. The nature of the bonding in the synthesized compounds was studied through analysis of their IR and NMR spectra and X-ray crystal structures. These studies revealed that the trans-effect of other ligands in the complex is quite significant in determining the lability of the metal-sulfoxide bond. Some of the more stable platinum structures were then tested for their activity as catalysts in hydroboration and diboration reactions.

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Kinetic trans effect in square planar transition metal complexes

Cited by 20 publications

References 0 publications

Immobilized rGO/TiO<sub>2</sub> Photocatalyst for Decontamination of Water

Immobilized rGO/TiO<sub>2</sub> Photocatalyst for Decontamination of Water

Immobilized rGO/TiO2 Photocatalyst for Decontamination of Water

Synthesis, Structure, and Catalytic Studies of Palladium and Platinum Bis-Sulfoxide Complexes

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