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Winter A.,Friedrich - Schiller University of Jena | Winter A.,Jena Center for Soft Matter | Winter A.,Center for Energy and Environmental Chemistry Jena Jena | Schubert U.S.,Friedrich - Schiller University of Jena | And 2 more authors.
Chemical Society Reviews | Year: 2016

The incorporation of metal centers into the backbone of polymers has led to the development of a broad range of organometallic and coordination compounds featuring properties that are relevant for potential applications in diverse areas of research, ranging from energy storage/conversion to bioactive or self-healing materials. In this review, the basic concepts and synthetic strategies leading to these types of materials as well as the scope of available characterization techniques will be summarized and discussed. © 2016 The Royal Society of Chemistry.


Winter A.,Friedrich - Schiller University of Jena | Winter A.,Jena Center for Soft Matter | Winter A.,Dutch Polymer Institute | Hager M.D.,Friedrich - Schiller University of Jena | And 6 more authors.
Advanced Materials | Year: 2011

The utilization of supramolecular chemistry, i.e., metal-to-ligand coordination, in the field of nanotechnology is evaluated with respect to 2,2′:6′,2″-terpyridine, as tridentate metal binding site. Stabilization as well as directed self-assembly of nanometer-sized materials into ordered arrays are the most widely studied targets of current research. Moreover, energy- and/or electron-transfer processes are enabled when redox-active terpyridine complexes are bound to (semi)conducting species (e.g., fullerenes, polyoxometalates)-thus, applications in nanoelectronics and catalysis are currently arising from these hybrid materials. Progress made in these fields, resulting from the marriage of terpyridines (as well as their metal complexes) and nanostructures, is summarized in this Review Article. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Winter A.,Friedrich - Schiller University of Jena | Winter A.,Jena Center for Soft Matter | Winter A.,Dutch Polymer Institute | Newkome G.R.,University of Akron | And 3 more authors.
ChemCatChem | Year: 2011

The coordination compounds of the tridentate oligopyridine ligand 2,2':6',2''-terpyridine (tpy) are utilized in very different fields of research, such as materials science (e.g. photovoltaics), biomedicinal chemistry (e.g. DNA intercalation), and organometallic catalysis. Applications in the latter area have arisen from initial reports on electro- or photochemical processes and, today, a broad range of reactions-from artificial photosynthesis (water splitting) to biochemical and organic transformations as well as polymerization reactions-have been catalyzed by terpyridines and their transition metal complexes. In this review, the scope and the limitations of these applications, which emerged particularly in organic and macromolecular chemistry, will be evaluated. More to this than meets the eye: The concept of terpyridine complexes and catalysis is reviewed critically with respect to applications in conventional organometallic catalysis, as well as in electro- and photcatalytic processes. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Schulze M.,Friedrich - Schiller University of Jena | Jager M.,Friedrich - Schiller University of Jena | Schubert U.S.,Friedrich - Schiller University of Jena | Schubert U.S.,Jena Center for Soft Matter
Macromolecular Rapid Communications | Year: 2012

The incorporation of room-temperature red-emissive [Ru II(dqp) (dqp-CH 2OH)] 2+ (dqp is 2,6-di(quinolin-8-yl)pyridine) in poly(ε-caprolactone) (PCL) is explored following two routes. First, the ring-opening polymerization of ε-caprolactone is investigated using the free ligand and the complex as initiators. Alternatively, the complexation strategy utilizing PCL-dqp as a macroligand is detailed. Both routes yield room-temperature emissive polymers centered at 400 nm (free ligand) and 680 nm (complex) in aerated solvent. DSC and TGA showed the typical properties of PCL, for example, the melting point (59 °C). © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Winter A.,Friedrich - Schiller University of Jena | Winter A.,Jena Center for Soft Matter | Hoeppener S.,Friedrich - Schiller University of Jena | Hoeppener S.,Jena Center for Soft Matter | And 5 more authors.
Advanced Materials | Year: 2011

Terpyridines represent versatile functional supramolecular building blocks that are easily integrated in numerous devices and can readily modify surfaces. In particular, redox-active complexes with terpyridine ligands have been attached to surfaces, either by covalent or non-covalent interactions, and form highly ordered mono- or multilayer systems, since electronic and charge transport properties are major topics of interest. Their applications in nanoelectronics are a driving force for understanding and enabling the utilization of the supramolecular properties of terpyridines for surface modification. This area of research has received increasing attention during the last decade leading into the supramacromolecular regime. This Progress Report presents an overview of the state-of-the-art of surface modifications utilizing terpyridine systems and highlights main results, as well as modern trends, in this research area. Terpyridines are interesting photo- and redox-active building blocks that can be used to functionalize surfaces. This molecular engineering approach promises unique possibilities to self-assemble functional devices, molecular electronic structures, switches, and responsive surfaces. Trends and recent progress in this area of research are highlighted and provide a state-of-the-art overview of the developments in the past decade. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Mansfeld U.,Laboratory of Organic and Macromolecular Chemical IOMC | Mansfeld U.,Dutch Polymer Institute | Hoeppener S.,Laboratory of Organic and Macromolecular Chemical IOMC | Hoeppener S.,Jena Center for Soft Matter | And 3 more authors.
Advanced Materials | Year: 2013

The movement of individual block copolymer micelles in free-standing films of ionic liquids is investigated by transmission electron microscopy with the aim of providing an easily accessible high-resolution imaging tool for the in situ observation of particle movement in a liquid environment. A proof of concept and first studies on the behavior of individual particles in the fluid are demonstrated. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Trautwein R.,Friedrich - Schiller University of Jena | Almazahreh L.R.,Friedrich - Schiller University of Jena | Gorls H.,Friedrich - Schiller University of Jena | Weigand W.,Friedrich - Schiller University of Jena | Weigand W.,Jena Center for Soft Matter
Zeitschrift fur Anorganische und Allgemeine Chemie | Year: 2013

[FeFe] hydrogenase model complexes [Fe(CO)3]2[(μ- ECH2)2C(CH2OH)2] (E = S (1) or Se (2)) containing CH2OH bridgehead substituents were synthesized via reaction of equimolar amounts of 4, 4-bis(hydroxymethyl)-1, 2-dithiolane (A) or 4, 4-bis(hydroxymethyl)-1, 2-diselenolane (B) with Fe3(CO) 12 in toluene at 100°C. The presence of OH groups in complexes 1 and 2 is found to influence the cathodic processes and their potentials. The catalytic reduction of acetic acid (AcOH) occurs by the anions 1- and 2-, while the neutral complexes are procatalysts. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Janoschka T.,Friedrich - Schiller University of Jena | Janoschka T.,Jena Center for Soft Matter | Teichler A.,Friedrich - Schiller University of Jena | Teichler A.,Jena Center for Soft Matter | And 10 more authors.
Advanced Energy Materials | Year: 2013

Inkjet printing can be used to manufacture flexible organic radical battery (ORB) electrodes. A reactive printing approach based on the thermal crosslinking of amine bearing redoxactive radical polymers is developed. The printed electrodes are stable for over one hundred charging/discharging cycles. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Friebe C.,Friedrich - Schiller University of Jena | Hager M.D.,Friedrich - Schiller University of Jena | Winter A.,Friedrich - Schiller University of Jena | Schubert U.S.,Friedrich - Schiller University of Jena | And 2 more authors.
Advanced Materials | Year: 2012

Electropolymerization represents a suitable and well-established approach for the assembly of polymer structures, in particular with regard to the formation of thin, insoluble films. Utilization of monomers that are functionalized with metal complex units allows the combination of structural and functional benefits of polymers and metal moieties. Since a broad range of both electropolymerizable monomers and metal complexes are available, various structures and, thus, applications are possible. Recent developments in the field of synthesis and potential applications of metal-functionalized polymers obtained via electropolymerization are presented, highlighting the significant advances in this field of research. Electropolymerization of metal-containing monomers allows the formation of hybrid materials that combine advantageous properties of polymers and metal complex units. Varying monomer assemblies can lead to different types of metallopolymers featuring differing metal-polymer backbone interactions. Recent progress and trends concerning the electrochemical incorporation of metal complexes into polymer structures and their potential application possibilities are presented. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Jager M.,Friedrich - Schiller University of Jena | Jager M.,Jena Center for Soft Matter | Schubert S.,Friedrich - Schiller University of Jena | Schubert S.,Jena Center for Soft Matter | And 7 more authors.
Chemical Society Reviews | Year: 2012

Poly(ethylene imine)s (PEIs) are widely used in different applications, but most extensively investigated as non-viral vector systems. The high ability of cationic PEIs to complex and condense negatively charged DNA and RNA combined with their inherent proton sponge behavior accounts for the excellent efficiency in gene delivery. Further chemical modifications of the polymer expand the application potential, primarily aiming at increased transfection efficiency, cell selectivity and reduced cytotoxicity. Improvements in the synthesis of tailor-made PEIs in combination with new in-depth analytical techniques offer the possibility to produce highly purified polymers with defined structures. The contemporary strategies towards linear and branched poly(ethylene imine)s with modified surface characteristics, PEI-based copolymers as well as conjugates with bioactive molecules will be discussed. In this regard, the versatile branched PEIs have been successfully modified in a statistical manner, whereas the linear counterparts open avenues to design and synthesize well-defined architectures, in order to exploit their high potential in gene delivery. © 2012 The Royal Society of Chemistry.

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