Intern
    THE LAMBERT GROUP: PHYSICAL ORGANIC CHEMISTRY

    Chromatography

    Jasco recycling GPC/HPLC-system including a four channel UV-vis-detector (195-700 nm) and fraction collector.

    • preparative PSS GPC-columns (SDV / 10 µ / 20 x 600 mm / 50 Ǻ, 100 Ǻ, 1000 Ǻ),
    • (semi-)preparative MN HPLC-columns (VP Nucleosil / 5 µ / (10 x 250 mm), 21 x 250 mm / 120 Ǻ),
    • analytical MN HPLC-column (EC Nucleosil / 5 µ / 4 x 250 mm / 120 Ǻ) 

    Shimadzu recycling GPC-system including a photodiode array UV-vis-detector (190-800 nm) and fraction collector.

    • preparative PSS columns (SDV / 10µ / 20 × 600 mm / 50 Ǻ, 100 Ǻ, 500 Ǻ),
    • analytical PSS columns (SDV / 5µ / 8 x 300 mm / 100 Ǻ, 1000 Ǻ, 100000 Ǻ, linear S)

    Interchim PF 450 Flash-chromatography-system including a photodiode array UV-vis-detector (175-840 nm) and fraction collector. The machine can be used either with ready to use flash cartridges or with refillable Kronlab glas columns.

    Shimadzu Gas-chromatograph GC 2010 plus including a Thermal Conductivity Detector (TCD), a Restek Q-Bond and a Restek Molsieves (5A) column.

    UV-vis-NIR Spectroscopy

    Jasco V-670 double beam UV-vis-NIR-Spectrometer (190-3200 nm)

    Agilent Cary 5000 double beam UV-vis-NIR-Spectrometer (175-3300 nm)

    Spectroelectrochemistry

    Princeton Applied Research Potentiostat PAR 283

    Spectroelectrochemical experiments in reflexion were performed in our Jasco V-670 Spectrometer in combination with a specially designed sample compartment consisting of a cylindrical quartz cell, a platinum disc electrode (6 mm), a gold-covered metal (V2A) plate as the counter electrode and a Ag/AgCl pseudo-reference electrode. 

    Spectroelectrochemical experiments in reflexion were also performed in our Agilent Cary 5000 Spectrometer in combination with a newly designed sample compartment consisting of a cylindrical PTFE cell with a sapphire window and an adjustable three in one electrode (6 mm platinum disc working electrode, 1 mm platinum counter and pseudo reference electrode). 

    Spectroelectrochemical measurements in transmission were performend in a quartz cell containing a minigrid-goldnet as the optical transparent working elektrode.

    Cyclic voltammetry

    Electrochemical Workstation BAS CV-50 W including Faraday-cage and Potentiostat CV-50 W.

    Electrochemical cell with a 3-electrode assembly and an integrated AlOx-column.

    • Pt disc electrodes: 10 µm, 1 mm, 2 mm, 3 mm
    • GC disc electrodes: 10 µm, 3 mm
    • Au disc electrodes: 10 µm, 1 mm

    Microelectrode Workstation including a Gamry Reference 600 Potentiostat and a Faraday-cage.

    Photocatalysis Setup

    Custom made Photocatalysis Setup with temperature control. Irradiation with different wavelengths (465 und 525 nm) and monitoring of pressure development.

    Fluorescence Spectroscopy

    Photon Technology International QuantaMasterTM Model QM-2000-4 including a cooled photomultiplier (type R928P), an InGaAs-NIR detector and a 75 W xenon short arc lamp (type UXL-75XE, Ushio).

    Photon Technology International TimeMasterTM Model TM-2/2003 fluorescence lifetime spectrometer.

    Edinburgh Instruments FLS 980 flourescence lifetime spectrometer with double grating excitation and emission monochromator.

    Steady state emission and excitation spectra

    • excitation source: 450 W Xenon lamp
    • detector: single photon counting PMT (R928P, 200-870 nm) in peltier cooled housing and Hamamatsu R5509-42 photomultiplier in nitrogen cooled housing (600-1400 nm)

    Absolute quantum yields by using an integrating sphere

    Lifetime option

    • excitation source: ps laser diodes
    • detector: high speed PMT (H10720)

    ns Transient Absorption Spectroscopy

    Laser-flash transient absorption spectrometer LP920 (Edinburgh Instruments) with an Ekspla flash lamp pumped, Q-switched Nd:YAG laser an OPO and SFG. Range: 350 - 2600 nm.

    We can also run magnetic field dependent transient absorption measurements.

    fs Transient Absorption Spectroscopy and Fluorescence Upconversion

    The amplified Ti:sapphire laser Solstice from Newport Spectra-Physics generates pulses with durations less than 100 fs and a repetition rate with 1 kHz. To have a broad band of excitation wavelength the Solstice is equipped with an OPA (TOPAS), whose emission can be set from 290 – 2600 nm.

    The Halcyone Fluorescence Life Time Spectrometer can be used for fluorescence upconversion and Time Correlated Single Photon Counting (TCSPC). The Upconversion mode can detect from 320-1600 nm in a time range of 130 fs up to 4 ns. The TCSPC-mode has a spectral range from 160-900 nm and a time resolution of 200 ps – 1 ms.

    Helios Transient Absorption Spectrometer

    Laser source (wavelength): Ti:sapphire (290-2600 nm), Detection range: 350-1600 nm (VIS-NIR), Time window: 150 fs - 8 ns

    NOPA (Noncollinear Optical Parametric Amplifier)

    The NOPA can be used to generate ultrashort pulses with variable wavelengths between 480 and 1600 nm from the output of the Solstice. The pulse durations are well below 30 fs throughout the visible and below 50 fs in the NIR. The spectral range around 800 nm can be accessed via whitelight generation with 1000-nm-pulses from the TOPAS.

    Quartzcrystal-Microbalance

    Stanford Research Systems quartz crystal microbalance digital controller QCM 200 including software LabViewTM 7 Express from National Instruments.

    Stanford Research Systems 5 MHz crystal oscillator QCM 25 using a 5 MHz crystal (1 inch, gold / Cr, polished).

    Glovebox

    MBraun Labmaster 130 Glovebox

    Kontakt

    Lehrstuhl für Physikalische Organische Chemie
    Am Hubland
    97074 Würzburg

    Tel.: +49 931 31-81412
    Fax: +49 931 31-87218
    E-Mail

    Suche Ansprechpartner

    Hubland Süd, Geb. C1