A novel and fast responsive turn-on fluorescent probe for the highly selective detection of Cd²⁺ based on photo-induced electron transfer.

ABSTRACT: A novel, highly sensitive and fast responsive turn-on fluorescence probe, 2,2'-((1E,1'E)-((1,10-phenanthroline-2,9-diyl)bis(methanylylidene)) bis(azanylylidene)) diphenol (ADMPA), for Cd²⁺ was successfully developed based on 2,9-dimethyl-1,10-phenanthroline and o-aminophenol. ADMPA showed a remarkable fluorescence enhancement toward Cd²⁺ against other competing cations, owing to the suppression of the photo-induced electron transfer (PET) and CH[double bond, length as m-dash]N isomerization. A good linear relationship (R ² = 0.9960) was obtained between the emission intensity of ADMPA and the concentration of Cd²⁺ (0.25-2.5 μM) with a detection limit of 29.3 nM, which was much lower than that reported in literature. Th

SUBMITTER: Huang MX 

PROVIDER: S-EPMC9074931 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature