Dynamic Light Scattering in Supramolecular Materials Chemistry

Braun, Jörg; Renggli, Kasper; Razumovitch, Julia; Vebert, Corinne

doi:10.1002/9780470661345.smc039

Cited by 12 publications

(13 citation statements)

References 131 publications

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“…Additional information about the size of nanoscopic objects in solution can be obtained by dynamic light scattering experiments. [18] These DLS experiments confirmed the results of the DOSY NMR and ESI-MS studies for both complexes, and hence provide additional independent support of the size, and therefore, the composition of our assemblies (see Supporting Information), especially because these techniques could also be used to correctly characterize a [M 12 L 24 ] aggregate from Fujita et al [19] We were also able to grow quite well formed crystals from our complexes but owing to the very large voids in the crystal filled with disordered anions and solvent molecules, the X-ray scattering power of the crystals was so weak that not even a unit cell could be obtained. [20] We also performed transmission electron microscopy (TEM) measurements to visualize the metallosupramolecular spheres.…”

mentioning

confidence: 99%

Enantiomerically Pure [M₆L₁₂] or [M₁₂L₂₄] Polyhedra from Flexible Bis(Pyridine) Ligands

Gütz¹,

Hovorka²,

Klein³

et al. 2014

Angew Chem Int Ed

104

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Coordination-driven self-assembly is one of the most powerful strategies to prepare nanometer-sized discrete (supra)molecular assemblies. Herein, we report on the use of two constitutionally isomeric BINOL-based bis(pyridine) ligands for this purpose. Upon coordination to Pd(II) ions these self-assemble into enantiomerically pure endo- and exo-functionalized hexa- and dodecanuclear metallosupramolecular spheres with a chiral skeleton depending on the substitution pattern of the BINOL core. These aggregates were characterized by NMR, MS, DLS, TEM, and EELS as well as ECD. Furthermore, experimental ECD data could be compared to those obtained from theoretical simulations using a simplified Tamm-Dancoff approximation to time-dependent DFT to rationalize the extraordinary high molar circular dichroisms. Despite the rotational freedom around the central aryl-aryl bond of these ligands, the self-assembly process happens completely selective in a "narcissistic" self-recognition manner.

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confidence: 99%

Enantiomerically Pure [M₆L₁₂] or [M₁₂L₂₄] Polyhedra from Flexible Bis(Pyridine) Ligands

Gütz¹,

Hovorka²,

Klein³

et al. 2014

Angew Chem Int Ed

104

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“…Zusätzliche experimentelle Belege für die Grçße nanoskopischer Objekte in Lçsung kçnnen mittels DLS erhalten werden. [18] Die DLS-Experimente bestätigten die Resultate der DOSY-NMR-und ESI-MS-Untersuchungen unserer beiden Komplexe und lieferten so weitere unabhängige Beweise für die Grçße und damit auch die Zusammensetzung der Aggregate (siehe Hintergrundinformationen). Dies gilt umso mehr auch deswegen, weil wir die Anwendbarkeit dieser Methoden anhand der erfolgreichen Charakterisierung eines bekannten [M 12 L 24 ]-Aggregats von Fujita et al als weitere Referenz demonstrieren konnten.…”

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Enantiomerenreine [M₆L₁₂]‐ oder [M₁₂L₂₄]‐Polyeder aus flexiblen Bis(pyridin)‐Liganden

et al. 2014

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Die koordinationsgetriebene Selbstorganisation ist eine der leistungsfähigsten Strategien zum Aufbau nanometergroßer diskreter (supra-)molekularer Aggregate. Hier berichten wir über die Verwendung von zwei konstitutionsisomeren Bis(pyridin)-Liganden auf der Basis von BINOL zu diesem Zweck. Je nach Substitutionsmuster des BINOL-Gerüsts bilden sich bei der Koordination [6-8] Dabei ist dieser Ansatz aber nicht nur konzeptionell interessant, sondern auch wegen der vielfältigen Anwendungen sehr attraktiv, da man bei der Verwendung von funktionalisierten Liganden zu endo-oder exo-funktionalisierten Aggregaten mit interessanten Eigenschaften gelangen kann. [9,10] Was bislang noch nicht realisiert werden konnte, ist die Konstruktion eines metallosupramolekularen Aggregats mit sechs oder mehr Palladium-oder Platinatomen, das aus einem inhärent chiralen Liganden gebildet wird und folglich ein chirales sphärisches metallosupramolekulares Gerüst aufweist und nicht aus einer achiralen Sphäre mit exo-oder endoständigen chiralen Gruppen besteht.[9d,h,j, 10a-c] Wir haben uns daher entschlossen, zwei konstitutionsisomere Bis(bipyridin)-Liganden 1 und 2 mit einem chiralen 2,2'-Dihydroxy-1,1'-bi-

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“…Dynamic light scattering (DLS) is used to determine particles’ size [ 47 , 48 ]. Therefore, the next stage of investigation was the study of pillar[5]arenes’ 12 – 15 ability to form supramolecular assemblies in the presence of guest molecules G1 - G4 in both water and DMSO.…”

Section: Resultsmentioning

confidence: 99%

Self-Assembly of Supramolecular Architectures by the Effect of Amino Acid Residues of Quaternary Ammonium Pillar[5]arenes

Nazarova

Shurpik

Padnya

et al. 2020

IJMS

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Novel water-soluble multifunctional pillar[5]arenes containing amide-ammonium-amino acid moiety were synthesized. The compounds demonstrated a superior ability to bind (1S)-(+)-10-camphorsulfonic acid (S-CSA) and methyl orange dye depending on the nature of the substituent, resulting in the formation one-to-one complexes with both guests. The formation of host-guest complexes was confirmed by ultraviolet (UV), circular dichroism (CD) and 1H NMR spectroscopy. This work demonstrates the first case of using S-CSA as a chiral template for the non-covalent self-assembly of architectures based on pillar[5]arenes. It was shown that pillar[5]arenes with glycine or L-alanine fragments formed aggregates with average hydrodynamic diameters (d) of 165 and 238 nm, respectively. It was established that the addition of S-CSA to the L-alanine-containing derivative led to the formation of micron-sized aggregates with d of 713 nm. This study may advance the design novel stereoselective catalysts and transmembrane amino acid channels.

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Dynamic Light Scattering in Supramolecular Materials Chemistry

Cited by 12 publications

References 131 publications

Enantiomerically Pure [M₆L₁₂] or [M₁₂L₂₄] Polyhedra from Flexible Bis(Pyridine) Ligands

Enantiomerically Pure [M₆L₁₂] or [M₁₂L₂₄] Polyhedra from Flexible Bis(Pyridine) Ligands

Enantiomerenreine [M₆L₁₂]‐ oder [M₁₂L₂₄]‐Polyeder aus flexiblen Bis(pyridin)‐Liganden

Self-Assembly of Supramolecular Architectures by the Effect of Amino Acid Residues of Quaternary Ammonium Pillar[5]arenes

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Dynamic Light Scattering in Supramolecular Materials Chemistry

Cited by 12 publications

References 131 publications

Enantiomerically Pure [M6L12] or [M12L24] Polyhedra from Flexible Bis(Pyridine) Ligands

Enantiomerically Pure [M6L12] or [M12L24] Polyhedra from Flexible Bis(Pyridine) Ligands

Enantiomerenreine [M6L12]‐ oder [M12L24]‐Polyeder aus flexiblen Bis(pyridin)‐Liganden

Self-Assembly of Supramolecular Architectures by the Effect of Amino Acid Residues of Quaternary Ammonium Pillar[5]arenes

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Enantiomerically Pure [M₆L₁₂] or [M₁₂L₂₄] Polyhedra from Flexible Bis(Pyridine) Ligands

Enantiomerically Pure [M₆L₁₂] or [M₁₂L₂₄] Polyhedra from Flexible Bis(Pyridine) Ligands

Enantiomerenreine [M₆L₁₂]‐ oder [M₁₂L₂₄]‐Polyeder aus flexiblen Bis(pyridin)‐Liganden