Raoul Schaper

ORCID: 0000-0003-4369-9686
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Research Areas
  • X-ray Diffraction in Crystallography
  • Crystallization and Solubility Studies
  • Metal-Organic Frameworks: Synthesis and Applications
  • Chemical Synthesis and Characterization
  • Covalent Organic Framework Applications
  • Organometallic Complex Synthesis and Catalysis
  • Metal complexes synthesis and properties
  • Asymmetric Hydrogenation and Catalysis
  • Quinazolinone synthesis and applications
  • Synthesis and characterization of novel inorganic/organometallic compounds
  • Fluid Dynamics and Mixing
  • Crystallography and molecular interactions
  • Heat Transfer and Boiling Studies
  • Synthesis and biological activity
  • Organometallic Compounds Synthesis and Characterization
  • Electrocatalysts for Energy Conversion
  • Supercapacitor Materials and Fabrication
  • Multicomponent Synthesis of Heterocycles
  • Coordination Chemistry and Organometallics
  • Advancements in Battery Materials
  • Organoboron and organosilicon chemistry
  • Cyclone Separators and Fluid Dynamics

Carl von Ossietzky Universität Oldenburg
2017-2021

University of Surrey
2002

University of Twente
2002

Herein, we report a semiconductive, proton-conductive, microporous hydrogen-bonded organic framework (HOF) derived from phenylphosphonic acid and 5,10,15,20-tetrakis[p-phenylphosphonic acid] porphyrin (GTUB5). The structure of GTUB5 was characterized using single crystal X-ray diffraction. A narrow band gap 1.56 eV extracted UV-Vis spectrum pure crystals, in excellent agreement with the 1.65 obtained DFT calculations. same also measured for DMSO. proton conductivity to be 3.00 × 10

10.1038/s41467-020-16977-0 article EN cc-by Nature Communications 2020-06-23

The reactions of the monopentafulvene complexes Ti1a and Ti1b with general formula [Cp*Ti(Cl)(π-η5:σ-η1-C5H4═CR2)] (R = p-tolyl (Ti1a); CR2 adamantylidene (Ti1b)) bidentate P,O-ligand precursor L1, featuring a diphenylphosphine hydroxyl functional group, are reported, yielding corresponding Ti2a Ti2b in good yields as result deprotonation. A chloride/methyl exchange reaction subsequent B(C6F5)3 was envisaged to yield cationic complexes. Instead, methylation methyllithium or methylmagnesium...

10.1021/acs.organomet.8b00088 article EN Organometallics 2018-03-16

Abstract Transition metal ferrites, such as CoFe 2 O 4 (CFO) and NiFe (NFO), have gained increasing attention potential materials for supercapacitors. Since chemical vapor deposition (CVD) offers advantages like interface quality to the underlying substrates possibility coverage of 3D substrates, two CVD processes are reported CFO NFO. Growth rates amount 150 200 nm h −1 yield uniform, dense, phase pure spinel ferrite films according X‐ray diffraction (XRD), Raman spectroscopy, Rutherford...

10.1002/admi.202100949 article EN cc-by-nc Advanced Materials Interfaces 2021-09-24

The reactions of monopentafulvene complexes Ti1 , Zr1 and Hf1 with bidentate O P ‐ligand precursors L1 – L3 to form the corresponding cationic employing an established three‐step synthetic protocol [insertion, methylation, activation B(C 6 F 5 ) 3 ] are investigated. Ligands designed have different sized spacers between carbonyl diphenylphosphine functional groups. attempts react acetyldiphenylphosphine ( proved yield undesired products at various steps in sequence. When is used, Ti2 formed...

10.1002/ejic.201801016 article EN European Journal of Inorganic Chemistry 2018-10-08

10.1205/026387602321143435 article EN Process Safety and Environmental Protection 2002-11-01

A straightforward three-component reaction (3-CR) for the preparation of a variety biologically interesting amido (thio)xanthates has been developed. By proper choice potassium (thio)xanthate salt, cyclic or acyclic imine, and an acyl chloride as substrates broad scope with respect to substituents can be realized. This operationally simple one-pot method proceeds under mild environmentally friendly conditions while is produced single waste-product.

10.1055/s-0036-1589050 article EN Synthesis 2017-07-25

<p>We report the first semiconductive, proton-conductive, microporous hydrogen-bonded organic framework (HOF) derived from phenylphosphonic acid and 5,10,15,20‐tetrakis[<i>p</i>‐phenylphosphonic acid] porphyrin (known as GTUB5). The structure of GTUB5 was characterized using single crystal X-ray diffraction (XRD). A narrow band gap 1.56 eV extracted a UV-Vis spectrum pure crystals, in excellent agreement with 1.65 obtained density functional theory calculations. same also...

10.26434/chemrxiv.12003321 preprint EN cc-by-nc-nd 2020-03-19

Abstract Invited for the cover of this issue is group Rüdiger Beckhaus from University Oldenburg, Germany. The image shows path to cationic 4 complexes prepared.

10.1002/ejic.201801455 article EN European Journal of Inorganic Chemistry 2018-12-10
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