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Hints for Using the Spin Trap Database

Spin Trap Database

Spin Trap notation is divided into common and 'weird'. The common spin traps are abbreviated as:

DMPO 5,5-DIMETHYLPYRROLIDINE-1-OXIDE
PBN ALPHA-PHENYL-N-TERT-BUTYL NITRONE
MNP 2-METHYL-2-NITROSOPROPANE
ND 2,3,5,6-TETRAMETHYLNITROSOBENZENE
O ALPHA-(4-PYRIDYL-1-OXIDE) N-T-BU NITRONE (POBN)
S 3,5-DIBROMO-4-NITROSOBENZENE SULFONATE (DBNBS)

Please be aware that some uncommon abbreviations such as "O" for POBN and "S" for DBNBS have been used in the spin trap field. Other spin traps may be found in the "Spin Trap" field and/or the "Miscellaneous" field, so you should try each field to make sure you find your data. A complete list of spin traps can be found by searching the symbol abbreviations for the "@" character - this yields a super set of possible spin traps.

Solvent notation is odd. Aqueous solution at neutral pH is noted as AQ07P4. To search for any aqueous solution, just enter "AQ". Toluene is TO, Benzene is BZ. Search the symbol abbreviations for additional solvent notation.

Radical notation uses the period to indicate the location of the radical. For instance, to search for a carbon centered radical, use ".C" in the radical field. The period must be the first character in the radical field.

Hyperfine coupling constants. The hyperfine coupling constants are expressed in Gauss. If no margin is entered, the default is 5% range. For isotope nuclei such as 15N, 31P, 19F, 13C, etc, you may enter them in the miscellaneous field.

All searches are done inclusive, i.e., the data record must merely include the information you have entered.

All searches are done case insensitive. You may enter upper or lower case letters equally.

Main record searches yield data that includes the record ID in brackets, as in "[409]". This number is the link between the main data table and the journal reference table. You will notice the record ID is underlined, it is linked to the journal table. You will then get the full journal reference and all the associated data records.

Journal reference searches are executed using either the reference ID number or reference text, such as an author's name or a portion of the article title. If you enter both a reference ID and text, then both searches will be performed. A reference search also returns the record ID in brackets with a link to the main data table. Therefore, you can search for all the papers by Chignell, then click on an [ID] and view all the data entries for that paper.

NIEHS is the source of nearly all the data in the database. Most was accumulated over five years of scouring reprints. An extra field in the database indicates the source of the data. The possible field values are:

NIEHS Original data entered by NIEHS staff
Other Subsequent data entered by student summer workers
Local Data entered into the tables through the revised multi-user command line program
WWW Data entered into the tables through the new multi-user WWW program