title: NIR-emitting aza-BODIPY dyes--new building blocks for broad-range optical pH sensors.
abstract: New aza-BODIPY indicators which cover the pH scale from 1.5 to 13 are presented. The new indicators feature absorption/emission bands in the red/near-infrared (NIR) spectral region, exhibit high molar absorption coefficients (∼ 80,000 M(-1) cm(-1)) and show good quantum yields (∼20%). All dyes represent promising building blocks for the development of a broad-range sensor for various pH ranges. Combination of four of these pH indicators yields a pH sensor with an extended dynamic range from pH 2 to 9.
authors.affiliation: Institute of Analytical Chemistry and Food Chemistry, Stremayrgasse 9/II, 8010 Graz, Austria. klimant@tugraz.at.
authors.forename: Martin
authors.initials: M
authors.lastname: Strobl
authors.forename: Tanja
authors.initials: T
authors.lastname: Rappitsch
authors.forename: Sergey M
authors.initials: SM
authors.lastname: Borisov
authors.forename: Torsten
authors.initials: T
authors.lastname: Mayr
authors.forename: Ingo
authors.initials: I
authors.lastname: Klimant