A Fluoro-Chromogenic Sensor Based on Organic Molecular Framework for Cu2+ and F- in Aqueous Soluble DMSO

Veikko Uahengo; Yan Zhang; Bi Xiong; Pingping Zhao; Ping Cai; Lydia Rhyman; Ponnadurai Ramasami; Kai Hu; Gongzhen Cheng

doi:10.1007/s10895-016-1945-6

A Fluoro-Chromogenic Sensor Based on Organic Molecular Framework for Cu²⁺ and F^- in Aqueous Soluble DMSO

J Fluoresc. 2017 Jan;27(1):191-197. doi: 10.1007/s10895-016-1945-6. Epub 2016 Oct 11.

Authors

Veikko Uahengo^{1

2}, Yan Zhang³, Bi Xiong³, Pingping Zhao³, Ping Cai³, Lydia Rhyman⁴, Ponnadurai Ramasami^{4

5}, Kai Hu³, Gongzhen Cheng³

Affiliations

¹ Department of Chemistry and Biochemistry, University of Namibia, 340 Mandume Ndemufayo Avenue, Windhoek, 9000, Namibia. vuahengo@unam.na.
² College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei, 430072, China. vuahengo@unam.na.
³ Department of Chemistry and Biochemistry, University of Namibia, 340 Mandume Ndemufayo Avenue, Windhoek, 9000, Namibia.
⁴ Computational Chemistry Group, Department of Chemistry, Faculty of Science, University of Mauritius, Réduit, 80837, Mauritius.
⁵ Department of Applied Chemistry, University of Johannesburg, Doornfontein Campus, P.O. Box 17011, Johannesburg, 2028, South Africa.

PMID: 27730418
DOI: 10.1007/s10895-016-1945-6

Abstract

The 2,2'-dinaphtholazobenzene molecular framework (P) was designed, synthesized and characterized. Its absorption and fluorescence properties revealed that P is a dual sensor for copper ions (Cu²⁺) and fluoride ions (F^-) in DMSO. The colorimetric activities were clearly visible by naked eye upon the addition of the two ions. Fluorescence quenching and enhancement were observed when Cu²⁺ and F^- ions were added respectively. Density Functional Theory (DFT) calculations were carried out to provide an insight into the interaction of guest ions (Cu²⁺ and F^-) with P, and to explain how the molecular orbitals were affected. Graphical Abstract ᅟ.

Keywords: DFT; Dual sensor; Fluorescence quenching-enhancement; Molecular recognition; Organic molecular framework.

Publication types

Review