Cooperative Effects in Multimetallic Complexes Applied in Catalysis

Maity, Ramananda; Birenheide, Bernhard; Breher, Frank; Sarkar, Biprajit

doi:10.1002/cctc.202001951

Cited by 98 publications

(162 citation statements)

References 254 publications

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“…It should be noted that despite moderate solubility in C 6 D 6 , AgBArF completely dissolves in the presence of 1 supporting the presence of attractive interactions between both species leading to 1-AgBArF (variable temperature 1 H NMR analysis in Figure S9-S11). In addition, the hypothesised 1-AgBArF was found be stable in C 6 D 6 for up to 6 hours as determined by 1 H NMR spectroscopy, which is well within the timescale for the observed polymerisation reaction to reach completion. Finally, as determined by 1 Overall, this confirms the existence of weak attractive interactions between 1 and Ag + to form a heterobimetallic species 1-Ag+, presumably via interactions involving one O i Pr group and the phenolate moieties of the salen ligand.…”

supporting

confidence: 64%

“…In addition, the hypothesised 1-AgBArF was found be stable in C 6 D 6 for up to 6 hours as determined by 1 H NMR spectroscopy, which is well within the timescale for the observed polymerisation reaction to reach completion. Finally, as determined by 1 Overall, this confirms the existence of weak attractive interactions between 1 and Ag + to form a heterobimetallic species 1-Ag+, presumably via interactions involving one O i Pr group and the phenolate moieties of the salen ligand. Upon addition of 1 equiv.…”

supporting

confidence: 64%

“…tandem catalysis). 1 The use of at least two different metals is of interest to enable the complementary reactivities offered by each metal to be exploited, either in tandem or synergistically. 2 Thus, heterobimetallic catalysts have been successfully applied to organic catalytic 1a reactions as well as to polymerisation reactions.…”

mentioning

confidence: 99%

“…using an equimolar amount of 1 and AgBArF), addition of a silver chelating agent such as bipyridine (bipy) immediately stops the polymerisation, presumably via formation of a Ag(bipy) 2 + complex and thus inhibiting any beneficial Ag-Ti cooperativity for rac-LA ROP. In order to gain a better understanding of the observed cooperativity, a stoichiometric reaction between 1 and AgBArF was monitored by 1 H NMR (400 MHz, C 6 D 6 ) and UV-Vis. spectroscopies.…”

mentioning

confidence: 99%

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Cation–π interactions enabling hard/soft Ti/Ag heterobimetallic cooperativity in lactide ring-opening polymerisation

2021

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supporting

confidence: 64%

supporting

confidence: 64%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Cation–π interactions enabling hard/soft Ti/Ag heterobimetallic cooperativity in lactide ring-opening polymerisation

2021

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“…The proximity of the reaction centers and their continuous interaction with substrate molecules provide synergy between heterogeneous catalysis. [ 58,59 ]

{normalM}_{1} - {normalA}_{ads} + {normalM}_{2} - {normalB}_{ads} \to {normalM}_{1} + {normalM}_{2} + A - B heterogeneous catalysis

…”

Section: Introductionmentioning

confidence: 99%

Multi‐Sites Electrocatalysis in High‐Entropy Alloys

Lai

et al. 2021

Adv Funct Materials

185

135

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High‐entropy alloys (HEAs) have attracted widespread attention in electrocatalysis due to their unique advantages (adjustable composition, complex surface, high tolerance, etc.). They allow for the formation of new and tailorable active sites in multiple elements adjacent to each other, and the interaction can be tailored by rational selection of element configuration and composition. However, it needs to be further explored in catalyst design, the interaction of elements, and the determination of active sites. This review article focuses on the important progress for multi‐sites electrocatalysis in HEAs. The classification is done on the basis of catalytic reaction, including hydrogen evolution reaction, oxygen evolution reaction, oxygen reduction reaction, alcohol oxidation reaction, carbon dioxide reduction reaction, and nitrogen reduction reaction. Based on experiments and theories, a more in‐depth exploration of the high catalytic activity of HEAs will be conducted, including the selection of elements (the special role of each element in catalysis) and the multi‐sites effect. This review can provide the basis for the element selection and design of HEAs in some reactions, to adjust the compositions of HEAs to improve their intrinsic activity. Furthermore, the remaining challenges and future directions for promising research fields are also provided.

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Redox‐Switchable Catalysis

Regenauer

Doll

Roşca

2022

Encyclopedia of Inorganic and Bioinorganic Chemistry

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The ability to control catalytic properties, such as selectivity and rate during the reaction, represents an attractive tool which can potentially deliver the synthesis of specialized products from a large pool of building blocks. This can be achieved by the incorporation of an on / off switch into the backbone of (pre‐)catalysts. The electronic or solubility properties of the switch can be then reversibly modified through the action of external triggers, a process which in turn modulates the catalytic activity. Incorporation of switches that can be reversibly reduced or oxidized represents one of the most versatile methods for controlling the catalytic activity in situ. This article describes the current state of research in the field of redox‐switchable catalysis, with a focus on homogenous metal‐mediated processes. The first part presents an overview of the types of redox switches and of the methods employed for delivering the redox stimuli. The second part then focuses on the catalytic transformations which can be controlled in this fashion, which include polymerization catalysis, metathesis, hydroelementation, and other catalytic reactions for the synthesis of fine chemicals.

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Cooperative Effects in Multimetallic Complexes Applied in Catalysis

Cited by 98 publications

References 254 publications

Cation–π interactions enabling hard/soft Ti/Ag heterobimetallic cooperativity in lactide ring-opening polymerisation

Cation–π interactions enabling hard/soft Ti/Ag heterobimetallic cooperativity in lactide ring-opening polymerisation

Multi‐Sites Electrocatalysis in High‐Entropy Alloys

Redox‐Switchable Catalysis

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