Abstract:
We have developed a novel aza-BODIPY probe for the
sensitive colorimetric detection of the nitrite ions in the aqueous
medium by a simple and direct method. This probe selectively
recognizes the nitrite ions through a distinct visual color change from
bright blue to intense green with a sensitivity of 20 ppb. Uniquely, this
probe can be coated on a glass surface to fabricate a simple solid-state
dipstick device that can be used for the visual detection of the nitrite
ions in the presence of other competing anions in distilled as well as
natural water resources like a sea, lake, and river. Furthermore, this
probe can be used for the sensitive detection of the nitrate ions when
coupled to a reduction step. Our results demonstrate that this probe not
only can be used for the on-site analysis and quantification but also can
replace the conventional spot test carried out for the nitrite ions in the
laboratory practical experiments.
