Contains searchable spectral peak data (no charts) on about 29,000 important organic substances. The data are no longer updated, and the interface is antiquated. Sources: The POC is based on data used in the CRC Handbook of Chemistry and Physics, as well as the Atlas of spectral data and physical constants for organic compounds (1975). It contains references to the print Sadtler spectral collections if you need to obtain the source spectrum. (ChemnetBase)
The Beilstein and Gmelin files (now contained in the Reaxys system) include spectral data for organic and inorganic compounds respectively, excerpted from the journal literature. Reaxys does not contain graphical spectra diagrams, and may only provide the pertinent literature reference. See Literature Searching for more information.
CAS has added experimental spectra for over 700,000 compounds in the Registry database. IR, MS and NMR spectra are from Wiley spectral databases and the Japanese SDBS database. In addition, CAS has added millions of predicted proton and 13C NMR spectra from ACD Labs and about 75,000 experimental 13C and 1H NMR spectra from BioRad-Sadtler.
Contains IR spectra (via interactive applet) for various compounds. The directory can be searched by registry number, molecular formula, chemical name or synonyms in different languages as well as by physical and chemical characteristics and combinations of those data. May also be searched by substructure. The data are submitted from various sources and should not be considered critically evaluated.
Database containing basic physical and spectral data (but not diagrams) and selected literature references for over 500,000 chemical substances and their derivatives. UV maxima and solvent are searchable via the property field search, but other peaks are not searchable. (ChemnetBase)
"The Atomic Spectra Database (ASD) contains data for atom and ion transitions, and energy levels. Lines are included for the first 99 elements in the periodic table. The energy level tables also contain ionization limits. ASD contains data on about 950 spectra, with about 144,400 lines from 0.4 to 5,000,000 angstroms in wavelength, plus about 77,000 energy levels."
"This handbook is designed to provide a selection of the most important and frequently used atomic spectroscopic data in an easily accessible format. The compilation includes data for the neutral and singly-ionized atoms of all elements hydrogen through einsteinium (Z = 1-99). The wavelengths, intensities, and spectrum assignments are given in a table for each element, and the data for the approximately 12,000 lines of all elements are also collected into a single table, sorted by wavelength (a "finding list")."
"Three databases of diatomic, triatomic, and hydrocarbon molecules were originally published as spectral tables in the Journal of Physical and Chemical Reference Data. Each covers primarily the microwave region with some data for the radio frequency region. Rotational spectral lines for 121 diatomic molecules, 55 triatomic molecules, and 91 hydrocarbons have been tabulated. The isotopic molecular species, assigned quantum numbers, observed frequency, estimated measurement uncertainty, and reference are given for each transition."
Version 4.1 provides "access to the energies of many photoelectron and Auger-electron spectral lines. Resulting from a critical evaluation of the published literature, the database contains over 22,000 line positions, chemical shifts, doublet splittings, and energy separations of photoelectron and Auger-electron lines. A highly interactive program allows the user to search by element, line type, line energy, and many other variables. Users can easily identify unknown measured lines by matching to previous measurements."
"The RRUFF Project is creating a complete set of high quality spectral data from well characterized minerals and is developing the technology to share this information with the world. Our collected data provides a standard for mineralogists, geoscientists, gemologists and the general public for the identification of minerals both on earth and for planetary exploration." Entries include photos of the sample, collected data, and measured chemistry in addition to the locality and source. (Univ. of Arizona)