𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Oxygen quenching of tris(2,2′-bipyridine) ruthenium(II) complexes in thin organic films

✍ Scribed by H.Neil McMurray; Peter Douglas; Csilla Busa; Michael S. Garley

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
550 KB
Volume
80
Category
Article
ISSN
1010-6030

No coin nor oath required. For personal study only.

✦ Synopsis

A study is presented of the quenching, by oxygen, of the luminescence of tris(2,2'-bipyridine) ruthenium(I1) complexes immobilized in thin, transparent, polymer-based films. The film media consist of a water-insoluble linear polymer plasticized with a trialkylphosphate ester, in which the complex ruthenium cations are solubilized by ion pairing with organophilic anions such as tetraphenylborate. Luminescence lifetimes were studied in relation to oxygen concentration in a gas stream contiguous with the film medium, film thickness and concentration of the metal complex within the fitm medium. It is shown that the microheterogeneous environment of the luminescent complex, which has recently been implicated in the nonlinear quenching responses of polymer-immobilized, transition metal complex oxygen sensors, may arise simply as a consequence of the limited solubility of the complex in the film medium. When solubility is limited, the partial precipitation of the complex results in a colloidal dispersion of luminescent particles which exhibit nonuniform susceptibilities to quenching by oxygen. Good solubility, and therefore linear quenching characteristics, are promoted by methyl substitution of the bipyridyl ligand and by use of a plasticizer (tributylphosphate) with marked cation sohrating powers.

📜 SIMILAR VOLUMES

Luminescent Properties of Tris(2,2′-bipy
Luminescent Properties of Tris(2,2′-bipyridine)ruthenium(II) in Sol-Gel-Processed Dip-Coated Thin Films
✍ S. López; A. Senz; H.E. Gsponer 📂 Article 📅 2002 🏛 Elsevier Science 🌐 English ⚖ 80 KB

The luminescence decay and spectral behavior of ruthenium(II)-tris-1,2-bipyridine dichloride dissolved in different organically modified silicate gel matrixes were investigated. Dip-coated thin films were synthesized from tetraethoxysilane (TEOS), methyltriethoxysilane (MTEOS), ethyltriethoxysilane

Synthesis and Photophysical Properties o
Synthesis and Photophysical Properties of New 2,2′-Bipyridine-Bridged Bis[ruthenium(II)tris-2,2′-bipyridine] Complexes
✍ König, Burkhard ;Zieg, Harald ;Cola, Luisa De ;Balzani, Vincenzo ;Nimtz, Manfred 📂 Article 📅 1997 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 500 KB

We have synthesized a new type of tris-2,2'-bipyridine ligand of 7 and 8 do not interact appreciably, as is evident from their with 4,4'-and 6,6'-disubstituted 2,2'-bipyridine (bpy) units. electrochemical and photophysical data. The lifetime of the The terminal 4,4'-disubstituted 2,2'-bipyridine moi

Temperature dependence of photoinduced e
Temperature dependence of photoinduced electron-transfer reactions in tris(2,2′-bipyridine)ruthenium(II) complex—organic quencher systems
✍ Noboru Kitamura; Sumio Okano; Shigeo Tazuke 📂 Article 📅 1982 🏛 Elsevier Science 🌐 English ⚖ 284 KB

To obtain information on the ntedctermirung [actors for photoinduced electron-transfer reactIons. thcrmodynamlc puamcters were dctcrmincd for Ru @py):+-orgarnc quencher-acctonitrdc systems WC round large dtikrence m thermodynamic parameters between systems containing electron donors and acceplors 3s

Resonance Raman spectra of tris(violurat
Resonance Raman spectra of tris(violurate)ruthenium(II) and of mixed (violurate)bis(2,2′-bipyridine)ruthenium(II) complexes
✍ V. R. L. Constantino; H. E. Toma; L. F. C. de Oliveira; P. S. Santos 📂 Article 📅 1992 🏛 John Wiley and Sons 🌐 English ⚖ 312 KB

## Abstract The existence of two independent chromophores in [Ru(bipy)~2~(H~2~V)]^+^, where H~2~V^−^ = violurate anion and bipy = 2,2′bipyridine, was demonstrated by comparing its resonance Raman spectra with those displayed by the [Ru(H~2~V)~3~]^−^ analogue. In the former, the electronic band at 4