A substituted BF(2)-chelated tetraarylazadipyrromethene as an intrinsic dual chemosensor in the 650-850 nm spectral range

The synthesis and spectral analysis of a new class of long wavelength intrinsic fluorosensor is reported. Chemosensor performance reveals large off/on fluorescence intensity responses to acid analyte with low response to microenvironment polarity. Application to ratiometric. fluorescence/UV-visible analysis is outlined.