Ultrafast photo-dynamics of a reversible photochromic spiropyran

Jonathan Hobley, Ursula Pfeifer-Fukumura, Michael Bletz, Tsuyoshi Asahi, Hiroshi Masuhara, Hiroshi Fukumura

研究成果: Article査読

71 被引用数 (Scopus)

抄録

We report the first ultrafast ring closure kinetics of the merocyanine (MC) of a reverse photochromic spiropyran 1′,3′,3′-trimethyl-6,8-dinitrospiro[2H-1-benzopyran-2,2-indoli ne] (6,8-dinitro BIPS) and its 1′-(2-carboxyethyl) substituted derivative. The reaction is fast and essentially over in a few hundred picoseconds. The rate of MC-S1 state decay evaluated from transient absorbance can be correlated directly with the MC-S1 state lifetime as determined using stimulated and ordinary emission measurements. The recovery of the MC-S0 state from MC-S1 has a component with a lifetime of 60-78 ps in acetonitrile with a second component of 350-470 ps probably due to a metastable intermediate. We can further establish that the excited MC-S1 state takes on the order of 500 fs to form from higher-energy states after photoexcitation with 390 nm light.

本文言語English
ページ(範囲)2265-2270
ページ数6
ジャーナルJournal of Physical Chemistry A
106
10
DOI
出版ステータスPublished - 2002 3月 14

ASJC Scopus subject areas

  • 物理化学および理論化学

フィンガープリント

「Ultrafast photo-dynamics of a reversible photochromic spiropyran」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル