Herstellung und Charakterisierung von metallosupramolekularen dünnen Polyelektrolytfilmen

Schütte, Markus; Kurth, Dirk G.; Linford, Matthew R.; Cölfen, Helmut; Möhwald, H.

doi:10.1002/(sici)1521-3757(19981016)110:20<3058::aid-ange3058>3.0.co;2-7

Cited by 38 publications

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“…With the recent discovery of metallosupramolecular coordination polyelectrolytes (MEPE),6 novel components are now available that allow a facile entry to advanced PACs 7. Metallosupramolecular devices possess diverse reactive, kinetic, and thermodynamic properties that make them attractive for applications in electronic, magnetic, and photonic materials.…”

Section: Introductionmentioning

confidence: 99%

“…First, MEPE ( 1 ) is prepared in aqueous solution by self‐assembly of ditopic 1,4‐bis(2,2′:6′,2″‐terpyridin‐4′‐yl)benzene and suitable metal ions, such as Fe II (see Figure 1). 6 With most transition metal ions, terpyridines form stereochemically non‐ambiguous complexes with pseudo‐octahedral coordination geometry ( D 2d symmetry) 20. Therefore, metal‐ion coordination of bis‐terpyridine ligands results in linear, extended, positively charged macromolecules.…”

Section: Introductionmentioning

confidence: 99%

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Structural Analysis of a Metallosupramolecular Polyelectrolyte-Amphiphile Complex at the Air/Water Interface

et al. 2001

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A detailed analysis of a metallosupramolecular coordination polyelectrolyte-amphiphile complex (PAC) at the air/water interface is presented based on Langmuir isotherm measurements, Brewster angle microscopy as well as X-ray reflectance and diffraction measurements. The PAC is prepared in solution by metal-ion coordination of Fe(OAc)2 and 1,4-bis(2,2':6',2"-terpyridin-4'-yl)benzene followed by self-assembly with dihexadecyl phosphate (DHP). The spreading of the PAC at the air/water interface results in a Langmuir film with a stratified architecture, such that DHP forms a monolayer on the water surface, while the metallosupramolecular coordination polyelectrolyte (MEPE) is immersed in the aqueous subphase. Electrostatic interactions of MEPE and DHP force the alkyl chains into an upright, hexagonal lattice even at low surface pressures. This work illustrates how supramolecular, colloidal, and surface chemistry can be combined to create complex architectures with tailored characteristics that may not be accessible through self-organization in the liquid phase.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structural Analysis of a Metallosupramolecular Polyelectrolyte-Amphiphile Complex at the Air/Water Interface

et al. 2001

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“…In addition, layers of different functional components can be systematically placed within the thin film. While this method has been successfully applied to metallo‐supramolecular coordination polyelectrolytes,14 it has never been convincingly demonstrated with discrete metallo‐units 15…”

Section: Methodsmentioning

confidence: 99%

“…Emission experiments used instrumentation as previously described 9. Multilayers were prepared and characterized according to a published procedure 14. Compound 1 was dissolved in water/methanol (1/3).…”

Section: Methodsmentioning

confidence: 99%

Immobilization of π-Assembled Metallo-Supramolecular Arrays in Thin Films: From Crystal-Engineered Structures to Processable Materials

et al. 2001

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Material and device performance is critically dependent on the spatial arrangement of the functional constituents. The ability to control the short-and long-range correlation of position and orientation of components is crucial for full exploitation of a materials potential and the encoding of new properties.[1] Supramolecular synthetic methodologies enable the systematic design and construction of tailored architectures through a sequence of directed assembly processes. [2] Metallo-units are particularly attractive functional components because of their inherent magneto-, [3] electro-, [4] and/or photochemical [5] properties.By means of crystal engineering, solid-state multimetal arrays can be constructed by using interactions of metal ions with multitopic ligands [6] or other intermolecular forces to organize metallo-units. [7±9] However, processing a crystalline solid into a device remains a challenge. Moreover, in a single crystal, it is difficult to achieve attractive features such as gradients, often necessary for vectorial functions. Thin films play an important role in applications [10] such as storage, display, and sensing, yet to date there are no generic methodologies for incorporating and ordering discrete cationic metal complexes into thin films. [11] To address this challenge and to attempt to bridge the gap between fundamental supramolecular crystal engineering and layered materials, we investigated whether p-aggregated metallo-arrays can be incorporated into ordered two-dimensional thin films.A particularly attractive method to assemble thin films is the layer-by-layer (LbL) method, which rests primarily on [*] Dr.

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“…Möhwald und Kurth et al charakterisierten ein Koordinationspolymer aus 1,4‐Bis(terpyrid‐4′‐yl)benzol (Abbildung 64; eine Verbindung, die von Constable et al230 erstmals beschrieben wurde) und Eisen( II )‐Ionen mithilfe der Analytischen Ultrazentrifugation 231. Anhand der Svedberg‐Gleichung bestimmten sie eine mittlere Molmasse von mindestens 14 900 g mol −1 entsprechend 25 Wiederholungseinheiten.…”

Section: Makromoleküle Mit Terpyridinligandenunclassified

MakromolekÃ¼le mit Bipyridin- und Terpyridinkomplexen als VerknÃ¼pfungsstellen: erste Schritte auf dem Weg zu metallo-supramolekularen Polymeren

2002

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Die Fähigkeit von Stickstoffheterocyclen, Übergangsmetallionen wie Cobalt(II), Kupfer(II), Nickel(II) und Ruthenium(ii) außerordentlich effektiv und stabil zu komplexieren, wird schon seit langem in der Analytischen Chemie angewendet. In der Supramolekularen Chemie nutzte man später diese Eigenschaft zum Aufbau anspruchsvoller Strukturen wie Helicate, Leitern oder Gitter. Die Entdeckung der Makromoleküle durch Staudinger eröffnete bereits 1922 den Zugang zu einer Materialklasse mit bis dahin völlig unbekannten Eigenschaften. Erst in den letzten Jahrzehnten jedoch wurde versucht, die Makromolekulare und Supramolekulare Chemie durch die Entwicklung von metallkomplexierenden und metallhaltigen Polymeren mit Anwendungen von der Filtration bis zur Katalyse zu vereinen. Die entscheidende Anforderung an Materialien für solche Anwendungen ist die Stabilität der Polymer‐Metallkomplexe. Besonders vielversprechend ist die Verwendung der mehrzähnigen Bipyridin‐ und Terpyridin‐Chelatliganden, die sehr stabile Übergangsmetallkomplexe mit beeindruckenden physikalischen Eigenschaften bilden. Ein breites Spektrum an Strukturen ist für eine ebenso umfangreiche Zahl von Anwendungen entwickelt worden. Die Synthese von Polymeren auf Basis koordinativer Wechselwirkungen wurde dagegen bis vor wenigen Jahren nur in sehr wenigen Fällen realisiert und führte darüber hinaus häufig zu geringen Ausbeuten. In den vergangenen Jahren jedoch erlebte die Forschung zu selbstorganisierten und supramolekularen Polymeren als neue, „intelligente“ Materialien mit einstellbaren Eigenschaften einen Höhenflug. In diesem Aufsatz geben wir einen Überblick über dieses Gebiet an der Schnittstelle von Supramolekularer und Makromolekularer Chemie.

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Herstellung und Charakterisierung von metallosupramolekularen dünnen Polyelektrolytfilmen

Cited by 38 publications

References 17 publications

Structural Analysis of a Metallosupramolecular Polyelectrolyte-Amphiphile Complex at the Air/Water Interface

Structural Analysis of a Metallosupramolecular Polyelectrolyte-Amphiphile Complex at the Air/Water Interface

Immobilization of π-Assembled Metallo-Supramolecular Arrays in Thin Films: From Crystal-Engineered Structures to Processable Materials

MakromolekÃ¼le mit Bipyridin- und Terpyridinkomplexen als VerknÃ¼pfungsstellen: erste Schritte auf dem Weg zu metallo-supramolekularen Polymeren

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