Scholarlink

Abstract <p>The properties of dipyrenylcyclobutanes CB10 and CBoX, which are products of the [2+2] photocycloaddition (PCA) reaction of biphotochromic dyads D10 and DoX, respectively, have been studied. The absorption and fluorescence spectra in cyclobutane CBoX revealed the presence of different types of pyrene substituents, with strong and weak interactions in the ground S<sub>0</sub> and excited S<sub>1</sub> states. In both cyclobutanes, energy transfer from the pyrenyl substituents to the cyclobutane rings is observed, initiating the cyclobutane opening reaction (retro-PCA), which occurs via the predissociation mechanism. The photochromic pair “D10–CB10” is an example of a new type of photochrome operating via the PCA reaction mechanism and can function as a two-channel color-correlated fluorescent photoswitch.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Spectral and Photochemical Properties of Dipyrenylcyclobutanes Formed in the [2+2] Photocycloaddition Reaction from Biphotochromic Dyads

  • 期刊论文

  • 发表日期：

    2025年2月1日

查看全文
  • M. F. Budyka,
  • V. M. Li,
  • T. N. Gavrishova

摘要

Abstract

The properties of dipyrenylcyclobutanes CB10 and CBoX, which are products of the [2+2] photocycloaddition (PCA) reaction of biphotochromic dyads D10 and DoX, respectively, have been studied. The absorption and fluorescence spectra in cyclobutane CBoX revealed the presence of different types of pyrene substituents, with strong and weak interactions in the ground S0 and excited S1 states. In both cyclobutanes, energy transfer from the pyrenyl substituents to the cyclobutane rings is observed, initiating the cyclobutane opening reaction (retro-PCA), which occurs via the predissociation mechanism. The photochromic pair “D10–CB10” is an example of a new type of photochrome operating via the PCA reaction mechanism and can function as a two-channel color-correlated fluorescent photoswitch.