AUTHOR=Liu Yan , Gao Shuang , Yang Liu , Liu Yu-Long , Liang Xiao-Min , Ye Fei , Fu Ying 

TITLE=A Highly Selective Perylenediimide-Based Chemosensor: “Naked-Eye” Colorimetric and Fluorescent Turn-On Recognition for Al3+

JOURNAL=Frontiers in Chemistry

VOLUME=Volume 8 - 2020

YEAR=2020

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2020.00702

DOI=10.3389/fchem.2020.00702

ISSN=2296-2646

ABSTRACT=A novel “turn-on” fluorescent probe (PCN) was designed, synthesized and characterized with perylene tetracarboxylic disimide as the fluorophore and Schiff base subunit as the metal ion receptor. The probe demonstrated a considerable fluorescence enhancement in the presence of Al3+ in DMF with high selectivity and sensitivity. Furthermore, the considerably ‘off-on’ fluorescence response simultaneously led to the apparent color change from colorless to brilliant yellow, which could also be identified by naked eye easily. The sensing capability of PCN to Al3+ was evaluated by the changes in UV-vis, fluorescence, FTIR 1H NMR and HRMS spectroscopy. The linear concentration ranges for Al3+ was 0-63 μM with detection limit of 0.16 μM, which allowed for the quantitative determination of Al3+.