Superfluorescence action from rhodamine-cored dendrimer

Shiyoshi Yokoyama, Tatsuo Nakahama, Akira Otomo, Shinro Mashiko

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4 Citations (Scopus)

Abstract

This paper describes preparation of the rhodamine B cored dendritic macromolecule, called Rh-dendrimer, and the radiative properties from the neat film due to the spontaneous emission and superfluorescence processes. An important concept investigated for material preparation is surrounding a fluorescent chromophore by the dendritic branches achieving a core-shell structure. Therefore, the dendrimer became emitting species with high fluorescence efficiency even in a high concentrated medium. Optical properties from the dendrimer were very different from that from the bared chromophore, which formed charge transferred complex and became less fluorescent. Under optical excitation, emission from the dendrimer was nonlinearly increased, giving relation of I ∝ N2 and ∝ τ-1, where I is the emission intensity, N is the number of molecules, and τ is the life time. Results were discussed in terms of superfluorescence.

Original languageEnglish
Pages (from-to)433-438
Number of pages6
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume198-200
DOIs
Publication statusPublished - Feb 18 2002
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

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