Impressive europium red emission induced by two-photon excitation for biological applications

Wai Sum Lo, Wai Ming Kwok, Ga Lai Law, Chi Tung Yeung, Chris Tsz Leung Chan, Ho Lun Yeung, Hoi Kuan Kong, Chi Hang Chen, Margaret B. Murphy, Ka-Leung WONG*, Wing Tak Wong

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

58 Citations (Scopus)


Three triazine-based europium(III) complexes were synthesized that demonstrated strong two-photon induced europium emission with a high two-photon absorption cross-section. The modified triazine ligand of complex 3 initiated over 100% enhancement of the two-photon absorption cross-section (σ2: 320 GM) when compared with complex 1 (σ2: 128 GM) in a solution of DMSO. Europium complex 3 is also stable in vitro, and power-dependence curves were obtained in vitro to confirm the two-photon-induced f-f emission in HeLa cells.

Original languageEnglish
Pages (from-to)5309-5311
Number of pages3
JournalInorganic Chemistry
Issue number12
Publication statusPublished - 20 Jun 2011

Scopus Subject Areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry


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