High-Yield Excited Triplet States in Pentacene Self-Assembled Monolayers on Gold Nanoparticles through Singlet Exciton Fission

Daiki Kato, Hayato Sakai, Nikolai V. Tkachenko, Taku Hasobe

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

One of the major drawbacks of organic-dye-modified self-assembled monolayers on metal nanoparticles when employed for efficient use of light energy is the fact that singlet excited states on dye molecules can be easily deactivated by means of energy transfer to the metal surface. In this study, a series of 6,13-bis(triisopropylsilylethynyl)pentacene-alkanethiolate monolayer protected gold nanoparticles with different particle sizes and alkane chain lengths were successfully synthesized and were employed for the efficient generation of excited triplet states of the pentacene derivatives by singlet fission. Time-resolved transient absorption measurements revealed the formation of excited triplet states in high yield (172±26 %) by suppressing energy transfer to the gold surface. Split the difference: A series of 6,13-bis(triisopropylsilylethynyl)pentacene-alkanethiolate monolayer protected gold nanoparticles with different particle sizes and alkane chain lengths were synthesized. These systems were employed for the efficient generation of excited triplet states on the pentacene molecules by using singlet exciton fission to suppress energy transfer to the Au surface.

Original languageEnglish
Pages (from-to)5230-5234
Number of pages5
JournalAngewandte Chemie - International Edition
Volume55
Issue number17
DOIs
Publication statusPublished - 2016 Apr 18

Keywords

  • gold
  • nanoparticles
  • pentacene
  • self-assembled monolayers
  • singlet fission

ASJC Scopus subject areas

  • Chemistry(all)
  • Catalysis

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