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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/113/02/0129-0138

    • Keywords

       

      Dimethyl sulphide, multiphoton ionization; time-of-flight mass spectroscopy

    • Abstract

       

      Multiphoton dissociation/ionization has been studied for CH3SCH3 at 355 and 532 nm using a time-of-flight mass spectrometer. The major ion signals observed at 355 nm are C+, CH3+, HCS+, CH2S+, CH3S+ and CH3SCH3+. Power dependence studies at 355 nm show a (2+1) REMPI process for the formation of parent ion. Peaks atm/e = 46, 47 and 61 show two-photon laser power dependence whereasm/e = 15 and 45 peaks show four-photon dependence. However, in 532 nm photo-ionisation, no parent ion signal is observed. A peak atm/e = 35 corresponding to SH3+ has been observed. SH3+ has been suggested to originate from CH3SCH2+ via a cyclic transition state. Photoionisation results of CH3SCH3 have been compared with those of CH3SSCH3, at these two wavelengths.

    • Author Affiliations

       

      Rajesh K Vatsa1 Chiranjib Majumder1 Onnattu D Jayakumar1 Shailendra K Kulshreshtha1 Jai P Mittal1

      1. Novel Materials and Structural Chemistry Division, Bhabha Atomic Research Centre, Mumbai - 400 085, India

    • Dates

       
      Published
      April 2001
      Manuscript received
      26 September 2000
      Manuscript revised
      28 November 2000

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