Spectroscopic Methods Flashcards
Analytical Chemistry Part 2
Used for identification myriad inorganic and organic species
UV-Vis
What is the application of UV-Vis
Organic Compounds, chromophoes, inorganic compound, charge transfer complexes
What are unshared outer electrons that are largely localized?
O, X, S and N
Radiation source, monochromator, shutter, reference cell, detector, amplifier, readout
Measurement of wavelength and intensity of the absorption of mid-infrared light by a sample
IR spectroscopy
Molecule must undergo a change in dipole moment
True
To absorb infrared radiation
IR source, beam splitter, chopper (wavelength selctor), monochromator, IR detector
Double Beam IR Spectroscopy Setup
IR Source
Nernst Glower
Rare earth oxides, fragile, must preheated to be conductive
IR Source
Rod of silicon carbide, at short wavelengths
Globar Source
IR Source
Carbon dioxide laser
Used for monitoring certain atmospheric pollutants
Thermal Detectors
Thermocouple and Bolometer
Most expensive
Photoconducting detectors
Insulator with special thermal and electric properties
Pyroelectric detectors
Neat means
Solvent
Nujol mull