A DFT Study of Pyrrole-Isoxazole Derivatives as Chemosensors for Fluoride Anion

International Journal of Molecular Sciences

Ruifa Jin¹  Weidong Sun¹ 

[1] College of Chemistry and Chemical Engineering, Chifeng University, Chifeng 024000, China; E-Mail:

关键词: pyrrole-isoxazole derivatives;    chemosensor;    BSSE (counterpoise) correction;    intramolecular charge transfer;    atoms in molecules;   

DOI  :  10.3390/ijms130910986

来源: mdpi

【 摘 要 】

The interactions between chemosensors, 3-amino-5-(4,5,6,7-tetrahydro-1H-indol-2-yl)isoxazole-4-carboxamide (AIC) derivatives, and different anions (F⁻ Cl⁻, Br⁻, AcO⁻, and H₂PO₄⁻) have been theoretically investigated using DFT approaches. It turned out that the unique selectivity of AIC derivatives for F⁻ is ascribed to their ability of deprotonating the host sensors. Frontier molecular orbital (FMO) analyses have shown that the vertical electronic transitions of absorption and emission for the sensing signals are characterized as intramolecular charge transfer (ICT). The study of substituent effects suggests that all the substituted derivatives are expected to be promising candidates for fluoride chemosensors both in UV-vis and fluorescence spectra except for derivative with benzo[d]thieno[3,2-b]thiophene fragment that can serve as ratiometric fluorescent fluoride chemosensor only.

【 授权许可】

CC BY   
© 2012 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.