Aggregation of azamethine dyes on hydrated glass surfaces

An evanescent wave-induced fluorescence study

Chetan K. Parmar, Gary Rumbles, Christopher J. Winscom

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The formation of luminescent aggregates of two pyrazolotriazole azamethine dyes in bulk solutions and at hydrated glass surfaces has been investigated using steady-state and time-resolved fluorescence spectroscopy as well as evanescent wave-induced fluorescence spectroscopy (EWIFS). Bulk measurements of dye A in methylcyclohexane, acetonitrile and dibutyl phthalate show that it exists as a molecular entity with fluorescence decay times in the sub-picosecond regime. However, in methylcyclohexane, dye B forms aggregates that possess fluorescence decay times in the nanosecond regime. Nevertheless, EWIF studies show that both dyes form luminescent aggregates at the interface between hydrated fused silica and methylcyclohexane, and hydrated flint glass (LASF3) and dibutyl phthalate.

Original languageEnglish
Pages (from-to)1766-1775
Number of pages10
JournalPhysical Chemistry Chemical Physics
Volume4
Issue number10
DOIs
Publication statusPublished - 2002

Fingerprint

evanescent waves
Coloring Agents
Agglomeration
dyes
Fluorescence
Dibutyl Phthalate
Glass
fluorescence
phthalates
glass
Fluorescence spectroscopy
flint
decay
Fused silica
spectroscopy
acetonitrile
silicon dioxide
methylcyclohexane

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Atomic and Molecular Physics, and Optics

Cite this

Aggregation of azamethine dyes on hydrated glass surfaces : An evanescent wave-induced fluorescence study. / Parmar, Chetan K.; Rumbles, Gary; Winscom, Christopher J.

In: Physical Chemistry Chemical Physics, Vol. 4, No. 10, 2002, p. 1766-1775.

Research output: Contribution to journalArticle

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