Dynamics of excited and ionic states of N,N,N′,N′-tetramethyl-p-phenylenediamine in poly(methyl methacrylate) under ablation condition

Hisashi Fujiwara, Hideki Fukumoto, Hiroshi Fukumura, Hiroshi Masuhara

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The nanosecond transient dynamics of N,N,N′,N′-tetramethyl-p-phenylenediamine in poly(methyl methacrylate) has been investigated under ablation condition. Time-resolved spectroscopic data can be interpreted in terms of the dynamics of the lowest excited singlet and triplet states and the cation of TMPD. The decay processes of all the detected transients became rapid with an increase in the laser fluence. It is shown directly that TMPD absorbs about eight 248 nm photons during a nanosecond laser pulse at the ablation threshold of 220 mJ/cm2. These results are well explained by cyclic multiphotonic absorption mechanism where dopant transients work as repetitive absorbers of laser photons.

Original languageEnglish
Pages (from-to)879-892
Number of pages14
JournalResearch on Chemical Intermediates
Volume24
Issue number8
DOIs
Publication statusPublished - 1998 Jan 1

ASJC Scopus subject areas

  • Chemistry(all)

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