New materials and surfaces

Organometallic synthesis

Organometallic synthesis

https://uefconnect.uef.fi/en/group/organometallic-synthesis/

The group belongs to the Department of Chemistry and the Institute of Photonics. It is also a member of the Academy of Finland’s Flagship on Photonics Research and Innovation (PREIN).

The group is currently focused on the design, preparation and theoretical analysis of a range of inorganic and organometallic photofunctional molecular materials. The research laboratory is well-equipped for structural and spectroscopic characterization of new compounds with crystallographic and NMR techniques.

In research, the group actively collaborates with international partners from St.-Petersburg State University, National Taiwan University, Technical University of Dortmund, University of Münster, University of Cologne. Our projects are funded by the University of Eastern Finland and the Academy of Finland.

Laboratory

Chemistry laboratories are located at the Futura building (UEF, Joensuu campus). The infrastructure includes, for example, the following devices:

  • JNM-EC500 JEOL 500MHz NMR spectrometer: characterization of chemical structure of liquid and solid materials
  • Bruker Vertex 70 FTIR spectrometer: characterization of chemical structure of materials
  • Elementar Vario Micro series gas chromatography elemental microanalysator: quantitative analysis of nitrogen, sulphur, hydrogen and carbon
  • Bruker AXS Kappa Apex Duo, Bruker AXS Smart Apex II, Nonius Kappa Apex single crystal X-ray diffractometers: determination of molecular structures of crystalline materials
  • Bruker ACS D8 Advance X-ray diffractometer: characterization of powder crystalline samples

Group members (https://uefconnect.uef.fi/en/group/organometallic-synthesis/)

Selected publications:

  1. Sivchik, V.; Kochetov, A.; Eskelinen, T.; Kisel, K. S.; Solomatina, A. I.; Grachova, E. V.; Tunik, S. P.; Hirva, P.; Koshevoy, I. O. Modulation of Metallophilic and π–π Interactions in Platinum Cyclometalated Luminophores with Halogen Bonding. Chem. Eur. J. 2021, 27, 1787-1794.
  2. Lin, T.-C.; Liu, Z.-Y.; Liu, S.-H.; Koshevoy, I. O.; Chou, P.-T. Counterion Migration Driven by Light-Induced Intramolecular Charge Transfer. JACS Au 2021, 1, 282-293.
  3. Belyaev, A.; Slavova, S. O.; Solovyev, I. V.; Sizov, V.; Jänis, J.; Grachova, E. V.; Koshevoy, I. O. Solvatochromic dual luminescence of Eu-Au dyads decorated with chromophore phosphines. Inorg. Chem. Front. 2020, 7, 140-149.
  4. Belyaev, A.; Cheng, Y.-H.; Liu, Z.-Y.; Karttunen, A. J.; Chou, P.-T.; Igor O. Koshevoy A Facile Molecular Machine: Optically Triggered Counterion Migration via Charge Transfer of Linear D-π-A Phosphonium Fluorophores. Angew. Chem. Int. Ed. 2019, 58, 13456–13465.
  5. Belyaev, A.; Chen, Y.-T.; Liu, Z.-Y.; Hindenberg, P.; Wu, C.-H.; Chou, P.-T.; Romero-Nieto, C.; Koshevoy, I. O. Intramolecular Phosphacyclization: Polyaromatic Phosphonium P-Heterocycles with Wide Tuning Optical Properties (420-780 nm emission). Chem. Eur. J. 2019, 25, 6332–6341.
  6. Shakirova, J. R.; Grachova, E. V.; Gurzhiy, V. V.; Thangaraj, S. K.; Jänis, J.; Melnikov, A. S.; Karttunen, A. J.; Tunik, S. P.; Koshevoy, I. O. Heterometallic cluster-capped tetrahedral assemblies with postsynthetic modification of the metal cores. Angew. Chem. Int. Ed. 2018, 57, 14154-14158.
  7. Belyaev, A.; Eskelinen, T.; Dau, T. M.; Ershova, Y. Y.; Tunik, S. P.; Melnikov, A. S.; Hirva, P.; Koshevoy, I. O. Cyanide-assembled d10 coordination polymers and cycles: excited state metallophilic modulation of solid-state luminescence. Chem. Eur. J. 2018, 24, 1404–1415.
  8. Belyaev, A.; Chen, Y.-T.; Su, S.-H.; Tseng, Y.-J.; Karttunen, A. J.; Tunik, S. P.; Chou, P.-T.; Koshevoy, I. O. Copper-mediated phospha-annulation to attain water-soluble polycyclic luminophores. Chem. Commun. 2017, 53, 10954-10957.
  9. Chakkaradhari, G.; Chen, Y.-T.; Karttunen, A. J.; Dau, M. T.; Jänis, J.; Tunik, S. P.; Chou, P.-T.; Ho, M.-L.; Koshevoy, I. O. Luminescent Triphosphine-Cyanide d10 Metal Complexes. Inorg. Chem. 2016, 55, 2174–2184.
  10. Sivchik, V. V.; Solomatina, A. I.; Chen, Y.-T.; Karttunen, A. J.; Tunik, S. P.; Chou, P.-T.; Koshevoy, I. O. Halogen Bonding to Amplify Luminescence: A Case Study Using a Platinum Cyclometalated Complex. Angew. Chem. Int. Ed. 2015, 54, 14057–14060.

Functional surfaces

Functional surfaces

https://uefconnect.uef.fi/en/group/functional-surfaces/

 

Photocatalysis Research Group

 

The photocatalysis research group is a part of Functional Surfaces research topic at the Department of Chemistry in the University of Eastern Finland. The group is also a member of the UEF Photonics Research Community and a member of the Academy of Finland Flagship on Photonics Research and Innovation (PREIN).

 

Photocatalysis utilizes light to activate chemical reactions. The most studied photocatalytic material is titanium dioxide (TiO2), which is a widely used white, inert, and non-toxic pigment and semiconductor. The bandgap of TiO2 is 3.2 eV corresponding to the UVA-range that is only approximately 3-5% of the solar spectrum. Therefore, recent research has focused on functionalization of TiO2 structures, for example, with metal nanoparticles that can couple visible light wavelengths for the photocatalytic excitation via plasmonic coupling. This can significantly improve the efficiency of such metal-semiconductor composites.

 

Our research group concentrates on fabrication and characterization of TiO2 inverse opal structures functionalized with different metallic nanostructures that allow efficient solar-driven chemical reactions and improved hydrogen evolution.

 

Laboratory

 

The photocatalysis laboratory is located at the Futura Building in the UEF Joensuu campus. The laboratory is equipped with novel gas-phase photocatalytic activity characterization tools and possibilities for various synthesis routes for multicompound and multilayer inverse opal semiconductor structures. The infrastructure includes measuring, imaging and manufacturing devices, for example:

  • Renishaw inVia confocal Raman microscope: chemical structure of materials as a function of sample depth, surface-enhanced Raman spectroscopy
  • Hitachi S-4800 FE-SEM scanning electron microscope with Thermo Electron Noran System Six 200 EDS detector: examination of surface structures of materials in micro and nanometer scale and measurement of elemental composition
  • Perkin Elmer Lambda 900 UV/VIS/NIR spectrometer: characterization of chemical structure of materials and measurement of colour, transmission and reflection properties
  • JNM-EC500 JEOL 500MHz NMR spectrometer: characterization of chemical structure of liquid and solid materials
  • Bruker Vertex 70 FTIR spectrometer: characterization of chemical structure of materials
  • KSV Cam 200 Contact angle meter: wettability of materials, contact angle and surface tension
  • KVS NIMA Dipcoater and Laurell technologies Co WS-400A-6NPP/LITE/10K spin coater: coating of materials with solutions
  • Cressington 208HR high resolution sputter coater: coating of materials with thin metal layer for SEM measurements
  • Haake MiniJet Micro compounder and Haake MiniLab micro Mini injection molding device: injection molding in laboratory scale and preparation of test specimen
  • Oxford Instruments Plasmalab 80plus ICP-DRIE plasma system: tailoring of surface structure and chemistry of materials
  • An in-house-built gas-phase photoreactor for photocatalytic activity characterization (measured by degradation of C2H2 into CO2 that is directly detected by an optical detector (Vaisala GMP343 diffusion mode) inside the photoreactor)
  • XRD by Bruker-AXS D8 Advance device

 

 

Group members

 

An automatically updated list of personnel can be found from the group UEF Connect website (see https://uefconnect.uef.fi/en/group/functional-surfaces/)

 

Publications

 

Our recent publications can be found from the group UEF Connect website (see https://uefconnect.uef.fi/en/group/functional-surfaces/)

 

For further information and inquiries, please contact the head of the Photocatalysis research group, Assoc. Prof. Jarkko J. Saarinen (https://uefconnect.uef.fi/en/person/jarkko-j..saarinen/)


Molecular Modelling

Molecular Modelling

https://uefconnect.uef.fi/en/group/molecular-modelling-research-group/

Laboratory

The infrastructure includes computer clusters located at the Futura building (UEF, Joensuu campus):

  • Dell EMC PowerEdge – 1240 cores
  • HP ProLiant – 768 cores
  • Dell PowerEdge – 768 cores

The computer clusters are combined into a grid of computer clusters situated at different locations around Finland (The Finnish Grid and Cloud Infrastructure, https://research.csc.fi/fgci). The joint resources are part of the cPouta cloud.

Keywords: catalysis; chemistry; clay; computational chemistry; coupling chemistry; DFT calculations; functional materials; friction surfaces; functional materials; functional surfaces; inorganic chemistry; luminescent materials; MAO; material chemistry; metal injection molding (MIM); metallocene; molecular dynamics; molecular modeling; nanomaterials; non-covalent interactions; nuclear waste disposal; OLED; organometallic chemistry; photocatalysis; photonics; plastics; polyolefin; quantum chemistry; self-assembly; surfaces; sustainable development; X-ray structural analysis; Ziegler-Natta