Ligand 4'-(4-carboxyphenyl)-2,2':6',2"-terpyridine grafted with TiO2-complexation with the ions metal transition and application as fluorosensor for Na+ ion

B. Malau, Agustino

Research output: Contribution to journalConference articlepeer-review


Ligand 4'-(4-Carboxyphenyl)-2,2':6',2"-Terpyridine (Hcptpy) has been synthesized using reaction of aldol condensation. The result was white-yellowish precipitate with yield of 62%. The Ligand hcptpy was grafted with TiO2 by mass ratio 0.15 : 1 (wt/wt). The Hcptpy-TiO2 was reacted in complexation reaction with transition metals (Fe, Mn, Ni) by chelating method, with the best mole chelating ratio of 0.15 : 1 (mole/mole). The ligand Hcptpy, Hcptpy-TiO2 and complex assembly M-Hcptpy-TiO2 were characterized by CHN Analyzer, HNMR, FT-IR, UV-VIS, and UV-DRS. The application of this research was to apply it as fluorosensor for sodium metal ion in sodium chloride. The study was conducted by spectrofluorometer. Types of fluoroscent for sodium metal ion detection are Chelation Quenching Effect (on-off signal) and the Chelation Enhanced Fluoroscence effect (off-on signal). The type of on-off signal causes a quenching in fluoroscence intensity, while the off-on signal causes an increase in fluoroscence intensity. The result showed that Hcptpy-TiO2, Ni-Hcptpy-TiO2 were the off-on fluoroscence type with the ability to respond the presence of sodium ion at concentration 3 × 10-10 M and 3 × 10-9M, respectively. While Mn-Hcptpy-TiO2 and Fe-Hcptpy-TiO2 were the on-off signal type with the ability to respond the presence of sodium metal ion at concentration 3 × 10-8 M and 3 × 10-8 M, respectively. The process of sodium metal ions detection was carried out by substitution reaction of metal ion in complex with sodium metal ions.

Original languageEnglish
Article number012044
JournalIOP Conference Series: Materials Science and Engineering
Issue number1
Publication statusPublished - 2 May 2017
EventInternational Symposium on Current Progress in Functional Materials 2016, ISCPFM 2016 - Bali, Indonesia
Duration: 26 Jul 201627 Jul 2016


  • 4-(4-carboxyphenyl)-2,2:6,2-terpyridine (Hcptpy)
  • complex assembly Mhcptpy-TiO
  • complex compound
  • fluorosensor
  • semiconductor TiO
  • transition metals


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