Analytical Spectroscopic Tools
As well as the ultrafast beamlines available for use, WCUS also has a number of frequency-resolved spectroscopic tools in its repertoire, and time-resolved methods with lower time resolution. These can be used for characterisation of samples previous to running ultrafast experiments. They are separate utilities, that do not require use of the ultrafast laser apparatus. You can book time on any of this apparatus using the booking button on the right of the page.
IR Spectroscopy
WCUS possess a Bruker Vertex 70V IR spectrometer for CW frequency resolved measurement of the IR spectra of samples. The spectrometer delivers a range from 25000 cm-1 to 50 cm-1 (~0.4 - 200 microns). It has a resolution of 0.4 cm-1 and can be used with solid, liquid, or gaseous samples under atmospheric or evacuated conditions. It has a reflection and transmission accessory, and a helium cryostat option for sample temperatures from 4K to 400K.
UV/VIS Spectroscopy
The Cary 60 UV/Vis spectrophotometer produces frequency resolved UV/Vis spectra over a wavlength range from 190 to 1100 nm with a 1.5 nm resolution. The spectrometer accepts standard 1 cm x 1 cm cuvettes for liquid or solution samples. It can also accept solid samples. The large sample region of the spectrometer, however, allows for a great deal of flexibility in the samples that can be analysed, and gaseous, cooled, or pressurised samples may be accommodated. Please contact a member of the team to discuss your requirements.
Fluorolog
The Horiba Fluorolog at WCUS allows fluorescence measurements to be performed, including taking emission spectra using a CW arc lamp lightsource, with excitation wavelengths ranging from ~250 nm to ~2000 nm, or measuring fluorescence lifetimes using a ns pulsed laser diode source at 320 nm, 402 nm, 533 nm or 650 nm. Multiple, interchangable PMTs allow detection from the ultraviolet (between 250 to 850 nm) to the infrared (from 950 to ~2500 nm). The infrared detectors require liquid nitrogen cooling, and can be measured directly, or via a lock-in amplifier when measuring very small signals. The Fluorolog has numerous filters to remove scattered light from the excitation source.
Recent publications using our Analytical Spectroscopy Equipment
Urocanic acid as a novel scaffold for next-gen nature-inspired sunscreens: II. Time-resolved spectroscopy under solution conditions
The 3237 cm−1 diamond defect: Ultrafast vibrational dynamics, concentration calibration, and relationship to the N3VH0 defect
Ring buckling and C=N isomerization pathways for efficient photoprotection in two nature-inspired UVA sunscreens revealed through ultrafast dynamics and high-level calculations
Synthesis and characterisation of novel composite sunscreens containing both avobenzone and octocrylene motifs
Spectroscopic insight on impact of environment on natural photoprotectants
Synergic photoprotection of phenolic compounds present in tomato fruit cuticle: a spectroscopic investigation in solution
A Concerted Redox- and Light-Activated Agent for Controlled Multimodal Therapy against Hypoxic Cancer Cells
Dephasing dynamics across local vibrational modes and crystalline environments
Insight into the Photodynamics of Photostabilizer Molecules
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