A Multi-Responsive Naphthalimide-Based "Turn-on" Fluorescent Chemosensor for Sensitive Detection of Trivalent Cations Ga3+, Al3+ and Cr3

Hyo Jung Jang; Ji Hye Kang; Dongju Yun; Cheal Kim

doi:10.1007/s10895-018-2240-5

A Multi-Responsive Naphthalimide-Based "Turn-on" Fluorescent Chemosensor for Sensitive Detection of Trivalent Cations Ga³⁺, Al³⁺ and Cr³

J Fluoresc. 2018 May;28(3):785-794. doi: 10.1007/s10895-018-2240-5. Epub 2018 May 23.

Authors

Hyo Jung Jang¹, Ji Hye Kang¹, Dongju Yun¹, Cheal Kim²

Affiliations

¹ Department of Fine Chemistry, Seoul National University of Science and Technology (SNUT), Seoul, 139-743, South Korea.
² Department of Fine Chemistry, Seoul National University of Science and Technology (SNUT), Seoul, 139-743, South Korea. chealkim@snut.ac.kr.

PMID: 29796828
DOI: 10.1007/s10895-018-2240-5

Abstract

A new multifunctional chemosensor 1, (E)-2-(((2-hydroxynaphthalen-1-yl)methylene)amino)-1H-benzo[de]isoquinoline-1,3(2H)-dione, based on naphtalimide and naphthaldehyde was developed, which showed the fluorescence responses to trivalent metal ions (Ga³⁺, Al³⁺ and Cr³⁺). Sensor 1 detected and differentiated selectively trivalent metal ions Ga³⁺, Al³⁺ and Cr³⁺ by fluorescence enhancement at different emissions. The association constant of Ga³⁺-2∙1 complex is the highest one among those of the organic chemosensors reported, to date. The sensing mechanisms for Ga³⁺, Al³⁺ and Cr³⁺ were explained by UV-vis titrations, Job plots, ESI-mass analyses and theoretical calculations.

Keywords: Aluminum; Chromium; Fluorescent chemosensor; Gallium; Theoretical calculations.