Water-tunable solvatochromic and nanoaggregate fluorescence: dual colour visualisation and quantification of trace water in tetrahydrofuran

Masaru Tanioka, Shinichiro Kamino, Atsuya Muranaka, Yoshinao Shirasaki, Yousuke Ooyama, Masashi Ueda, Masanobu Uchiyama, Shuichi Enomoto, Daisuke Sawada

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

While investigating the unique optical properties of aminobenzopyranoxanthenes (ABPXs), organic fluorescent dyes with the fusion of two rhodamines, we have found that the spirolactone form of ABPXs exhibited solvatochromic fluorescence in organic solvents. Detailed spectrophotometric and theoretical analyses showed that the solvatochromic fluorescence of ABPXs originated from the photo-excited charge separation in solvents of different dipolarities. Further studies revealed that fluorescent nanoaggregates were also formed in highly concentrated solution. The intriguing dual fluorescence properties of ABPXs were tunable in response to the water content, and served as a new detection principle for naked-eye visualisation (above 0.5 wt%) and quantification (0.010-0.125 wt%) of water in tetrahydrofuran.

Original languageEnglish
Pages (from-to)1209-1216
Number of pages8
JournalPhysical Chemistry Chemical Physics
Volume19
Issue number2
Early online dateDec 13 2016
DOIs
Publication statusPublished - 2017

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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