Selective blue emission from an HPBO-Li+ complex in alkaline media

S. O. Obare, C. J. Murphy

Research output: Contribution to journalArticlepeer-review


2-(2-Hydroxyphenyl)benzoxazole (HPBO) exhibits enhanced florescence and specificity for Li+ compared to Na+ and K+, in an alkaline medium. The selectivity was observed in several organic solvents in the presence of bases such as pyridine, triethylamine and trimethylamine. HPBO-Li+ complex formation results in an intense blue emission readily observed by the naked eye under UV light. Spectroscopic titrations suggest that the structure of the complex is one in which two HPBO anionic ligands coordinate to one Li+, witha second Li+ as a counterion.

Original languageEnglish (US)
Pages (from-to)1600-1604
Number of pages5
JournalNew Journal of Chemistry
Issue number12
StatePublished - Jan 1 2001
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Materials Chemistry


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