http://www.chem.ualberta.ca/~inorglab/spectutor.htm
gives basic idea about spectroscopic principles through animation .
The Spectroscopy tutorial requires Macromedia Flash Plug-In (minimum
version 4.0). If you have not installed it download Flash.
http://orgchem.colorado.edu/hndbksupport/irtutor/tutorial.html
is
very good reference for understanding IR spectroscopy and interpretation of IR/NMR
spectra.
Other good sites
for introductory IR are
http://www.cem.msu.edu/~reusch/VirtualText/Spectrpy/InfraRed/infrared.htm
http://teaching.shu.ac.uk/hwb/chemistry/tutorials/molspec/irspec1.htm
http://teaching.shu.ac.uk/hwb/chemistry/tutorials/molspec/irspec1.htm
from wikipedia (http://en.wikipedia.org/wiki/Infrared_spectroscopy)
you may get a basic idea about the instrumental techniques.
