Life Science Research Center, Gifu University
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Division of Instrumental Analysis
Supporting Research on the Synthesis of New Organic Molecules and Nano-Materials with Cutting-Edge Analysis Instruments
    Equipment and Machines
Equipment and Machines
 
 

Time-Resolved Flouresence Spectrometer (NAES)

 

Time-Resolved Photoluminescence Spectrophotometer (PL)
Photoluminescence is the emission of light when a substance is illuminated with high-energy electromagnetic radiation and which persists, for short times (usually of the order of ns) at least, after the source of illumination is removed. The anisotropy, decay time, and wavelength of absorption and emission during the process strongly depend on the electronic structure of excited and ground states, which are very sensitive to the molecular orientation and the dielectric constant of the environment in the substance. Therefore, time-resolved photoluminescence spectroscopy is not only useful to follow the electron transfer process in an emission device, but also obtain information on the molecular dynamics and micro-environment, using an appropriate fluorescence probe. Horiba NAES-700D is settled in the Center. It is equipped with two incident light sources;

1) Nano second lamp (NFL-700), which can generate 8.5 kHz sequential pulse of below 2 ns half width, at a wave length of 200-700 nm;

2) Nitrogen-dye laser (NDL-100), which can generate 5-1000 Hz sequential pulse of about 700 or 400 ps half width, at a wave length of 337.1 nm and 360-700 nm, to follow processes of the order of subnano seconds.
It is possible to measure the time-resolved spectrum in nano-second order. A Cryostat system (Oxford instruments, Optistat DN-VS cryostat and ITC502 temperature controller), which enables the measurements at the temperature range of 77-500 K, is also equipped.
2004.2.9 Back