Star-shaped electrochemiluminescent metallodendrimers with central polypyridyl Ru(II) complexes

Synthesis and their photophysical and electrochemical properties

Do Nam Lee, Bong Kwan Soh, Shin Han Kim, Young Moo Jun, Sook Hyun Yoon, Wonyong Lee, Byeong Hyo Kim

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Several dendritic bridging ligands were designed and synthesized to develop more sensitive and efficient electrochemiluminescent (ECL) polynuclear Ru(II) complexes. Various types of novel two-armed, four-armed and six-armed tris(bipyridyl)ruthenium core dendrimers were synthesized by coordinating dendritic polybipyridyl ligands with Ru(II) complexes, and the effect of the ligand and the dendritic network on the ECL characteristics were studied. Their electrochemical redox potentials, UV, photoluminescence (PL), and relative ECL intensities were also investigated in detail. The synthesized metallodendrimers exhibited strong metal-to-ligand charge transfer (MLCT) absorption at 428-451 nm and emission at 591-601 nm. Most of the newly synthesized metallodendrimers showed enhanced ECL intensities compared to the reference complex, [Ru(o-phen)3](PF6)2. In particular, the ECL intensities of the six-armed heptanuclear ruthenium complexes were almost four times greater than that of [Ru(o-phen)3]2+. These metallodendrimers could be utilized as efficient ECL materials and light emitting devices.

Original languageEnglish
Pages (from-to)655-666
Number of pages12
JournalJournal of Organometallic Chemistry
Volume693
Issue number4
DOIs
Publication statusPublished - 2008 Feb 15

Fingerprint

Electrochemical properties
Stars
Ligands
stars
ligands
Ruthenium
synthesis
ruthenium
Dendrimers
2,2'-Dipyridyl
dendrimers
Oxidation-Reduction
Charge transfer
Photoluminescence
Metals
charge transfer
photoluminescence
Light
Equipment and Supplies
metals

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

Lee, Do Nam ; Soh, Bong Kwan ; Kim, Shin Han ; Jun, Young Moo ; Yoon, Sook Hyun ; Lee, Wonyong ; Kim, Byeong Hyo. / Star-shaped electrochemiluminescent metallodendrimers with central polypyridyl Ru(II) complexes : Synthesis and their photophysical and electrochemical properties. In: Journal of Organometallic Chemistry. 2008 ; Vol. 693, No. 4. pp. 655-666.
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Star-shaped electrochemiluminescent metallodendrimers with central polypyridyl Ru(II) complexes : Synthesis and their photophysical and electrochemical properties. / Lee, Do Nam; Soh, Bong Kwan; Kim, Shin Han; Jun, Young Moo; Yoon, Sook Hyun; Lee, Wonyong; Kim, Byeong Hyo.

In: Journal of Organometallic Chemistry, Vol. 693, No. 4, 15.02.2008, p. 655-666.

Research output: Contribution to journalArticle

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AU - Lee, Do Nam

AU - Soh, Bong Kwan

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AU - Jun, Young Moo

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AU - Lee, Wonyong

AU - Kim, Byeong Hyo

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N2 - Several dendritic bridging ligands were designed and synthesized to develop more sensitive and efficient electrochemiluminescent (ECL) polynuclear Ru(II) complexes. Various types of novel two-armed, four-armed and six-armed tris(bipyridyl)ruthenium core dendrimers were synthesized by coordinating dendritic polybipyridyl ligands with Ru(II) complexes, and the effect of the ligand and the dendritic network on the ECL characteristics were studied. Their electrochemical redox potentials, UV, photoluminescence (PL), and relative ECL intensities were also investigated in detail. The synthesized metallodendrimers exhibited strong metal-to-ligand charge transfer (MLCT) absorption at 428-451 nm and emission at 591-601 nm. Most of the newly synthesized metallodendrimers showed enhanced ECL intensities compared to the reference complex, [Ru(o-phen)3](PF6)2. In particular, the ECL intensities of the six-armed heptanuclear ruthenium complexes were almost four times greater than that of [Ru(o-phen)3]2+. These metallodendrimers could be utilized as efficient ECL materials and light emitting devices.

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