Metal and phosphate ion recognition using dipicolylaminemodified fluorescent silica nanoparticles

Yuji Tsuchido, Aya Yamasawa, Takeshi Hashimoto, Takashi Hayashita*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


Dipicolylamine-modified fluorescent silica nanoparticles were prepared by introducing dipicolylamine to the surface of silica nanoparticles possessing terminal amines. We examined the selectivities of dipicolylamine-hydroxycoumarin carbonate (dpa-HCC) and dpa-HCC/fluorescent silica nanoparticles (FSiNP) for metal ions and phosphate anions. The dipicolylamine-modified silica nanoparticles responded to PPi, Tri and Pb 2+ , indicating novel selectivity derived from the assembly effect of dpa-HCC on the silica nanoparticle surface. Surface-modified fluorescent silica nanoparticles are expected to be used as a sensor for environmental and biological applications.

Original languageEnglish
Pages (from-to)1125-1130
Number of pages6
JournalAnalytical Sciences
Issue number10
Publication statusPublished - 2018
Externally publishedYes


  • Dipicolylamine
  • Fluorescent probe
  • Metal ion
  • Molecular recognition
  • Phosphate
  • Silica nanoparticle

ASJC Scopus subject areas

  • Analytical Chemistry


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