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Evidence of Simple Intramolecular Rearrangement at Polymer End Groups in Secondary Ion Mass Spectrometry by X. Vanden Eynde; H. Oike; M. Hamada; Y. Tezuka; P. Bertrand is a Chemistry article available to read on EtoBox.

What is Evidence of Simple Intramolecular Rearrangement at Polymer End Groups in Secondary Ion Mass Spectrometry about?

Polystyrenes with various end groups were analyzed by time-of-flight secondary ion mass spectrometry (TOF-SIMS). These end groups were obtained by termination of the active anionic group by sulfonate or chlorosilane derivatives. Characteristic end group fragments for each sulfonate derivative were observed. On the one hand, for PS capped by methyl sulfonate, or -(CH 2 ) 4 -O-SO 2 -CH 3 , almost complete end group fragment is observed at m/z 95 and a [O-SO 2 -CH 3 ] À molecular structure. On the other hand, when PS is terminated by silyl methyl sulfonate, or -Si(CH 3 ) 2 -(CH 2 ) 3 -O-SO 2 -CH 3 , the most characteristic fragment in the fingerprint secondary ion mass spectrum is located at m/z 153 with [Si(CH 3 ) 2 -O-SO 2 -CH 3 ] and the complete end group peak, [Si(CH 3 ) 2 -(CH 2 ) 3 -O-SO 2 -CH 3 ] , at m/z 201, is absent. According to the molecular structure, characteristic end group secondary ions can be emitted as complete or rearranged fragments. Various silylalkyl alcohol or sulfonate functionalities are analyzed and fragmentation pathways are discussed. To our knowledge, this is the first time that such rearrangement at silyl functions has been observed and demonstrated in

Who reads Evidence of Simple Intramolecular Rearrangement at Polymer End Groups in Secondary Ion Mass Spectrometry?

Author

X. Vanden Eynde; H. Oike; M. Hamada; Y. Tezuka; P. Bertrand

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0951-4198)

Published

1999

Language

EN

Field

Chemistry (Physical Sciences)