Analytical methods at the Seidel group
Due to the research focus of the Seidel group between organometallics and coordination chemistry, numerous analytical methods are available to examine the synthesised systems. Based on these results, conclusions can be drawn about the electronic situation, the ligand environment in the complex or the composition of the novel compounds, among other things.
The following is an excerpt of analytical methods with the corresponding equipment that are available and carried out in the Seidel group. Other necessary analyses are usually available in-house or are carried out with the help of cooperation partners.
If you have any questions about the analytical methods or the equipment, please contact the person in charge or Prof. Dr. Wolfram W. Seidel.
Mass spectrometry
Mass spectrometric measurements are ubiquitous in chemistry! Important information about the composition of samples can be obtained in all areas. Especially in preparative molecular chemistry, it is necessary to use mass spectrometric methods to unambiguously characterise chemical compounds and to elucidate their structure.
In preparative inorganic chemistry, chemical compounds with very different properties are synthesised, which means that the corresponding characterisation methods must have a wide range of applications. Since October 2020, the inorganic chemistry department at the University of Rostock has had a comprehensive mass spectrometer for the investigation and characterisation of different chemical compounds.
The different ionisation methods using electron spray ionisation (ESI) and chemical ionisation at atmospheric pressure (APCI) mean that not only charged or polar complexes but also uncharged and non-polar organometallic compounds can be investigated in a mass range from 10 to 2000 m/z. The sample form plays only a subordinate role in the measurements, so reaction solutions can be injected directly into the ionisation source, among other things. This method is particularly suitable for monitoring the course of the reaction when ligand and metal precursor are coordinated in order to draw conclusions about the conversion and formation of the product. In addition, solids can also be ionised directly, so that even poorly soluble organometallic compounds can be investigated.
Important basic information to the mass spectrometer:
- Instrument: expression L Compact Mass Spectrometer from Advion, since october 2020 at working
- Ion source: ESI, ASAP, APCI
- Analyser: Single-Quadrupol Analyzer
- Mass range: 10 to 2000 m/z
- Supervising person: Christoph Jahnke
Cyclic voltammetry
- Instrument: VersaStat3 from Ametek
- Working electrode: platinum, gold oder carbon
- reference electrode: Ag/Ag+
- Counter electrode: platinum
- Supervising person: M.Sc. Friederike Hamann
Spectroelectrochemistry (SEC)
- Instrument: ALPHA T from Bruker and VersaStat3 from Ametek
- Working electrode: platinium
- Counter electrode: platinium
- Reference electrode: Ag/Ag+
- Cell window: KBr
- Revising person: M.Sc. Friederike Hamann
Infrared spectroscopy
- Instrument: ALPHA T from Bruker
- Infrared range: 400 cm-1 to 4000 cm-1
- Cell window: KBr
- Supervising person: M.Sc Malte Reihwald
Raman- and Resonance-Raman-spectroscopy
- Instrument: LabRAM HR from Jobin Yvon Technologies
- Available LASER: 473 nm, 532 nm, 633 nm and 785 nm
- Supervising person: M.Sc. Lene Zabojnik
UV/Vis-spectroscopy
- Instrument: Cary 60 UV-Vis from Agilent Technologies
- Wavelength range: 200 nm to 1200 nm
- Supervising person: M.Sc. Friederike Hamann and M.Sc. Malte Reihwald
Fluorescence spectroscopy
- Instrument: Cary Egilent Fluorescence Spectrophotometer from Agilent Technologies
- Wavelength range: 200 nm to 1200 nm
- Supervising person: Prof. Dr. Wolfram W. Seidel