A5045846702- Metal-Organic Frameworks: Synthesis and Applications
- Covalent Organic Framework Applications
- Advanced NMR Techniques and Applications
- Luminescence and Fluorescent Materials
- X-ray Diffraction in Crystallography
- Advanced Battery Materials and Technologies
- Supercapacitor Materials and Fabrication
- Crystallization and Solubility Studies
- Magnetism in coordination complexes
- Advancements in Battery Materials
- Diatoms and Algae Research
- Marine Biology and Environmental Chemistry
- Marine Sponges and Natural Products
- Zeolite Catalysis and Synthesis
- Conducting polymers and applications
- Synthesis and characterization of novel inorganic/organometallic compounds
- Organophosphorus compounds synthesis
- Spectroscopy Techniques in Biomedical and Chemical Research
- Phosphorus compounds and reactions
- Advanced battery technologies research
- Solid-state spectroscopy and crystallography
- Chemical Synthesis and Characterization
- Geochemistry and Elemental Analysis
- Advanced Photocatalysis Techniques
- Metallurgical and Alloy Processes
TU Dresden
2015-2025
Bioanalytica (Switzerland)
2025
Helmholtz-Zentrum Berlin für Materialien und Energie
2017
TU Bergakademie Freiberg
1995-2004
Czech Academy of Sciences, Institute of Analytical Chemistry
2004
Virtual High School
2003
LinkedIn (United States)
2003
Kiel University
1983-1999
Abstract A two‐dimensional (2D) sp 2 ‐carbon‐linked conjugated polymer framework (2D CCP‐HATN) has a nitrogen‐doped skeleton, periodical dual‐pore structure and high chemical stability. The backbone consists of hexaazatrinaphthalene (HATN) cyanovinylene units linked entirely by carbon–carbon double bonds. Profiting from the shape‐persistent 2D CCP‐HATN integrated with electrochemical redox‐active HATN robust carbon‐carbon linkage, hybridized carbon nanotubes shows capacity 116 mA h g −1 ,...
π-Conjugated two-dimensional covalent organic frameworks (2D COFs) are emerging as a novel class of electroactive materials for (opto)electronic and chemiresistive sensing applications. However, understanding the intricate interplay between chemistry, structure, conductivity in π-conjugated 2D COFs remains elusive. Here, we report detailed characterization electronic properties two samples consisting Zn- Cu-phthalocyanine-based pyrazine-linked COFs. These synthesized by condensation...
Abstract Organic electrode materials are of long‐standing interest for next‐generation sustainable lithium‐ion batteries (LIBs). As a promising cathode candidate, imide compounds have attracted extensive attention due to their low cost, high theoretical capacity, working voltage, and fast redox reaction. However, the active site utilization electrodes remains challenging them fulfill potential applications. Herein, synthesis highly stable, crystalline 2D polyarylimide (2D‐PAI) integrated...
Abstract Two-dimensional conjugated polymers (2DCPs), composed of multiple strands linear with extended in-plane π-conjugation, are emerging crystalline semiconducting for organic (opto)electronics. They represented by two-dimensional π-conjugated covalent frameworks, which typically suffer from poor π-conjugation and thus low charge carrier mobilities. Here we overcome this limitation demonstrating two phthalocyanine-based poly(benzimidazobenzophenanthroline)-ladder-type 2DCPs (2DCP-MPc, M...
Inner workings: Diatom cell walls are outstanding examples of natural hybrid materials and exhibit interesting mechanical optical properties. Removal the biosilicates in T. pseudonana with NH4F proves that contain an internal, organic network consisting crosslinked chitin fibers as well other components (see picture). Detailed facts importance to specialist readers published ”Supporting Information”. Such documents peer-reviewed, but not copy-edited or typeset. They made available submitted...
The synthesis and structural flexibility of the metal–organic frameworks M2(2,6-ndc)2(dabco) (DUT-8(M), M = Ni, Co, Cu, Zn; 2,6-ndc 2,6-naphthalenedicarboxylate, dabco 1,4-diazabicyclo[2.2.2]octane) as well their characterization by gas adsorption, 129Xe NMR 13C MAS spectroscopy are described. Depending on integrated metal atom compounds show reversible (DUT-8(Ni), DUT-8(Co)), non-reversible (DUT-8(Zn)) or no (DUT-8(Cu)) transformation upon solvent removal and/or physisorption several gases....
A modular approach for the synthesis of highly ordered porous and chiral auxiliary (Evans auxiliary) decorated metal–organic frameworks is developed. Our strategy, which uses known structures as model materials incorporation chirality via linker modification, can provide access to a wide range suitable enantioselective separation catalysis. Chiral analogues UMCM-1 have been synthesized investigated enantioseparation compounds in liquid phase first promising results are reported.
The synthesis and structure of a new flexible metal–organic framework Ni2(2,6-ndc)2(dabco) (DUT-8(Ni), DUT = Dresden University Technology, 2,6-ndc 2,6-naphthalenedicarboxylate, dabco 1,4-diazabicyclo[2.2.2]octane) as well its characterization by gas adsorption 129Xe NMR spectroscopy is described. compound shows reversible structural transformation without loss crystallinity upon solvent removal physisorption several gases. Xenon studies combined with turn out to be favorable methods for the...
Nuclear Magnetic Resonance (NMR) spectroscopy is a well-established method for the investigation of various types porous materials. During past decade, metal–organic frameworks have attracted increasing research interest. Solid-state NMR has rapidly evolved into an important tool study structure, dynamics and flexibility these materials, as well characterization host–guest interactions with adsorbed species such xenon, carbon dioxide, water, many others. The present review introduces...
Abstract Polymeric semiconductors are emerging as a kind of competitive photocatalysts for hydrogen evolution due to their well‐tunable structures, versatile functionalization, and low‐cost processibility. In this work, series conjugated porous polymers with substantial cyano‐substituted fully sp 2 ‐carbon frameworks efficiently synthesized by using electron‐deficient tricyanomesitylene key building block promote an organic base‐catalyzed Knoevenagel condensation various aldehyde‐substituted...
Abstract Photoelectrochemical (PEC) water reduction, converting solar energy into environmentally friendly hydrogen fuel, requires delicate design and synthesis of semiconductors with appropriate bandgaps, suitable levels the frontier orbitals, high intrinsic charge mobility. In this work, a novel bithiophene‐bridged donor–acceptor‐based 2D sp 2 ‐carbon‐linked conjugated polymer (2D CCP) is demonstrated. The Knoevenagel polymerization between electron‐accepting building block...
Recently, we have described the metal-organic framework Ni(2)(2,6-ndc)(2)(dabco), denoted as DUT-8(Ni) (1) (DUT = Dresden University of Technology, 2,6-ndc 2,6-naphthalenedicarboxylate, dabco 1,4-diazabicyclo[2.2.2]octane). Upon adsorption molecules such nitrogen and xenon, this material exhibits a pronounced gate-pressure effect which is accompanied by large change specific volume. Here, describe use high-pressure in situ (129)Xe NMR spectroscopy, i.e., spectroscopic measurements xenon...
In this work, we demonstrate the first synthesis of vinylene-linked 2D CPs, namely, poly(phenylenequinoxalinevinylene)s 2D-PPQV1 and 2D-PPQV2, via Horner-Wadsworth-Emmons (HWE) reaction C2 -symmetric 1,4-bis(diethylphosphonomethyl)benzene or 4,4'-bis(diethylphosphonomethyl)biphenyl with C3 2,3,8,9,14,15-hexa(4-formylphenyl)diquinoxalino[2,3-a:2',3'-c]phenazine as monomers. Density functional theory (DFT) simulations unveil crucial role initial reversible C-C single bond formation for...
Electrochemical double-layer capacitors (EDLCs or supercapacitors) are of special potential interest with respect to energy storage. Nearly all EDLCs make use porous carbons as electrode materials. Further tuning their performance in EDLC applications requires a better understanding properties. In particular, the interactions between carbon-based materials and electrolyte solutions is fundamental future applications. Since capacitance known depend on pore size, we have studied different...
Biological materials are a rewarding area of modern science, yielding both evolutionary insights and inspiration for biomimetic research. In particular, biocomposite structures valuable sources novel with unusual chemical properties, they very informative the mechanisms biomineralization. Here we describe unique amorphous silica, crystalline aragonite, chitin from species order Verongida, group marine sponges. The have been analyzed diverse suite techniques, revealing chitinous template...
A bifunctional imidazolium linker was used for the production of highly crosslinked element organic frameworks by Suzuki-coupling with tetrafunctional boronic acids. The resulting porous materials are good heterogeneous organocatalysts in N-heterocyclic carbene-catalyzed conjugated umpolung α,β-unsaturated cinnamaldehyde.
Tailoring the characteristics of gating transitions in porous network, Ni<sub>2</sub>(ndc)<sub>2</sub>dabco, was achieved by systematically adjusting critical synthesis parameters.