Luminescence temperature sensing using poly(vinyl alcohol)-encapsulated Ru(bpy)32+ films

Autor:	Raymond T. Bailey, M. Catriona Tedford, Andrew Mills, Cheryl Tommons, P.J. Crilly
Rok vydání:	2006
Předmět:	Vinyl alcohol chemistry.chemical_element Photochemistry Biochemistry Oxygen Analytical Chemistry Ruthenium chemistry.chemical_compound chemistry Excited state Electrochemistry Luminophore Environmental Chemistry Limiting oxygen concentration Luminescence Spectroscopy Diimine
Zdroj:	The Analyst. 131:495
ISSN:	1364-5528 0003-2654
DOI:	10.1039/b516366h
Popis:	The ruthenium(II) diimine complexes, such as ruthenium(II) tris(bipyridyl), Ru(bpy)32+, possess highly luminescent excited states that are not only readily quenched by oxygen but also by an increase in temperature. The former effect can be rendered insignificant by encapsulating the complex in an oxygen impermeable polymer, although encapsulation often leads also to a loss of temperature sensitivity. The luminescence properties of Ru(bpy)32+ encapsulated in PVA were studied as a function of oxygen concentration and temperature and found to be independent of the former, but still very sensitive towards the latter. The results were fitted to an established Arrhenius-type equation, based on thermal quenching of the emitting state by a slightly higher (ΔE = 3100 cm−1) 3d-d state that deactivates very rapidly (10−13 s) via a non-radiative process.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fd354668692720076f53a9173179f736 https://doi.org/10.1039/b516366h Zobrazit plný text záznamu