In the gas phase or in condensed phase ?

Sir Brietzke: I am already a user of that database and I use it to verify experimental IR spectra. I don't think they have available UV-Vis spectra in their database.

Sir Doussin: Condensed phase please

NIST is closed. The NIST spectra database was very helpful ..

The US government shutdown doesn't only affect American researchers, but also those based anywhere else. I have difficulties accessing US government hosted databases which are important to my research. Examples are, of course, NIST spectra database, and the phytochemical and ethnobotanical database at http://www.ars-grin.gov/duke/

Look at: http://www.science-softcon.de/

This is a wonderful database that you can access for free:

http://www.science-softcon.de/

Recently the 10th version of the database has been released. 

Gregory

The spectrabase has very few UV spectra: the basic PAHs are missing for instance

The one I first checked by random has 2 errors

9-Anthraldehyde:

There is an absorption from 400-500 nm that is not in spectrabase

The absorption is in unit-less absorbance instead of absorption coefficient

I am not eligible cannot register, because as a retiree I have a public mail-address

Les composés phénoliques des végétaux: un exemple de métabolites secondaires ...

By Jean-Jacques Macheix, Annie Fleuriet,

Thank you for your suggestions. How can I find the UV-vis spectra of 4-Nitrophenyl-.beta.-phenylpropionate ( C15H13NO4 ) ; 1,2,3-Oxadiazol-3-ium ; 3-Phenylpropionic acid 4-cyanophenyl ester ( C18H17N3O ) and 5-Oxazolidinone, 3-benzoyl-2-(1,1-dimethylethyl)-4-(1-methylethyl)-4-(phenylmethyl)-. (2R-cis)? Thanks in advance.