Self-assembly of Zn(salphen) complexes: Steric regulation, stability studies and crystallographic analysis revealing an unexpected dimeric 3,3′-t-Bu-substituted Zn(salphen) complex

Belmonte, Marta Martínez; Wezenberg, Sander J.; Haak, Robert M.; Anselmo, Daniele; Escudero‐Adán, Eduardo C.; Benet‐Buchholz, Jordi; Kleij, Arjan W.

doi:10.1039/b925560e

Cited by 74 publications

(53 citation statements)

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“…This is important to verify whether the aggregates are stable enough to affect the biological behaviours. Following Kleij's method, 18,20 we also estimated the stability constants of the ZnL 1 aggregates in aqueous media. The relationship of the overall aggregation constant K agg , stepwise aggregation constant K n / n +1 , and the aggregation number n can be described using the following equation:(Znsalen) n + n Py ⇌ n Znsalen(Py) K = K Py n / K agg , K agg = K n / n +1 n –1 In this equation, K py represents the coordination constant of pyridine to the Zn center of ZnL 1 .…”

Section: Resultsmentioning

confidence: 99%

Unravelling the correlation between metal induced aggregation and cellular uptake/subcellular localization of Znsalen: an overlooked rule for design of luminescent metal probes

et al. 2015

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Section: Resultsmentioning

confidence: 99%

Unravelling the correlation between metal induced aggregation and cellular uptake/subcellular localization of Znsalen: an overlooked rule for design of luminescent metal probes

et al. 2015

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“…S2). The observed broadening can be assigned to a possible dimerization process [20]. Based on ZINDO/S semi-empirical electronic structure theoretical calculations and, as already reported for similar derivatives [16][17][18][19], the observed transitions must be predominantly p-p ⁄ (Fig.…”

Section: Photophysical Characterizationmentioning

confidence: 96%

“…The association constants are quite high considering the competiveness of the medium [20] that contends for the binding site of the receptor.…”

Section: Molecular Recognition Of Anionsmentioning

confidence: 98%

Anion selectivity of Zn–salophen receptors: Influence of ligand substituents

Sabaté

Giannicchi

Acón

et al. 2015

Inorganica Chimica Acta

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“…All other Zn(salphen) complexes (2, 3, 5 and 6) have been reported previously (see the Experimental section). 12,13 NMR studies…”

Section: Synthesismentioning

confidence: 99%

Supramolecular bulky phosphines comprising 1,3,5-triaza-7-phosphaadamantane and Zn(salphen)s: structural features and application in hydrosilylation catalysis

et al. 2013

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Supramolecular bulky phosphines comprising 1,3,5-triaza-7-phosphaadamantane and Zn(salphen)s: structural features and application in hydrosilylation catalysis Anselmo, D.; Gramage Doria, R.; Besset, T.R.M.L.; Escárcega-Bobadilla, M.V.; Salassa, G.; Escudero-Adán, E.C.; Belmonte, M.M.; Martin, E.; Reek, J.N.H.; Kleij, A.W. Published in: Dalton Transactions DOI:10.1039/c3dt00078hLink to publication Citation for published version (APA): Anselmo, D., Gramage-Doria, R., Besset, T., Escárcega-Bobadilla, M. V., Salassa, G., Escudero-Adán, E. C., ... Kleij, A. W. (2013). Supramolecular bulky phosphines comprising 1,3,5-triaza-7-phosphaadamantane and Zn(salphen)s: structural features and application in hydrosilylation catalysis. Dalton Transactions, 42(21), 7595-7603. https://doi.org/10.1039/c3dt00078h General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. The use of the commercially available, bifunctional phosphine 1,3,5-triaza-7-phosphaadamantane (abbreviated as PN 3 ) in conjunction with a series of Zn(salphen) complexes leads to sterically encumbered phosphine ligands as a result of (reversible) coordinative Zn-N interactions. The solid state and solution phase behaviour of these supramolecular ligand systems have been investigated in detail and revealed their stoichiometries in the solid state observed by X-ray crystallography, and those determined in solution by NMR and UV-Vis spectroscopy. Also, upon application of these supramolecular bulky phosphines in hydrosilylation catalysis employing 1-hexene as a substrate, the catalysis data infer the presence of an active Rh species with two coordinated, bulky PN 3 /Zn(salphen) assembly units having a maximum of three Zn(salphen)s associated per PN 3 scaffold, with an excess of bulky phosphines hardly affecting the overall activity. IntroductionSupramolecular catalysis has witnessed the development of a wide variety of catalyst structures showing unprecedented activity, selectivity and/or stability behaviour. 1 The common feature in all these catalysts is that the individual components self-assemble into the desired structures with high efficiency and little synthetic effort, which is highly attractive in cases where modular changes are (or tend) to be rapidly evaluated through the use of large libraries of ligands. Previously...

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Self-assembly of Zn(salphen) complexes: Steric regulation, stability studies and crystallographic analysis revealing an unexpected dimeric 3,3′-t-Bu-substituted Zn(salphen) complex

Cited by 74 publications

References 41 publications

Unravelling the correlation between metal induced aggregation and cellular uptake/subcellular localization of Znsalen: an overlooked rule for design of luminescent metal probes

Unravelling the correlation between metal induced aggregation and cellular uptake/subcellular localization of Znsalen: an overlooked rule for design of luminescent metal probes

Anion selectivity of Zn–salophen receptors: Influence of ligand substituents

Supramolecular bulky phosphines comprising 1,3,5-triaza-7-phosphaadamantane and Zn(salphen)s: structural features and application in hydrosilylation catalysis

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