| 초록 |
Mercury is a highly poisonous element and widespread pollutant, occurring from various sources. Organic forms of mercury, typically, methylmercury species (CH3HgX; X = halides, etc.) are much more toxic than inorganic mercury species because methylmercury species readily cross the blood–brain barrier and cause damage to the central nervous system. In this work, we synthesized dansyl-based fluorescent chemodosimeters based on the displacement of phenylboronic acids with mercury ions which showed a ratiometric response to Hg2+ and turn-on response to CH3Hg+. This probe showed high selectivity towards Hg2+ and CH3Hg+ over a wide range of metal ions in an aqueous buffered solution. This probe exhibited promising fluorescent sensing properties such as high sensitivity and selectivity, ratiometric fluorescent signals, and fast response. Study of the fluorescent spectrum reveals that this sensor reacts with mercury species providing a covalent adduct of mercury ions with Hg2+ and CH3Hg+. |
