New hexa-bodipy functionalized dendrimeric cyclotriphosphazene conjugates as highly selective and sensitive fluorescent chemosensor for Co2+ ions

Elif Şenkuytu; Esra Tanrıverdi Eçik

doi:10.1016/j.saa.2018.03.002

New hexa-bodipy functionalized dendrimeric cyclotriphosphazene conjugates as highly selective and sensitive fluorescent chemosensor for Co²⁺ ions

Spectrochim Acta A Mol Biomol Spectrosc. 2018 Jun 5:198:232-238. doi: 10.1016/j.saa.2018.03.002. Epub 2018 Mar 9.

Authors

Elif Şenkuytu¹, Esra Tanrıverdi Eçik²

Affiliations

¹ Department of Chemistry, Gebze Technical University, Gebze 41400, Kocaeli, Turkey. Electronic address: senkuytu@gtu.edu.tr.
² Department of Chemistry, Gebze Technical University, Gebze 41400, Kocaeli, Turkey.

PMID: 29547825
DOI: 10.1016/j.saa.2018.03.002

Abstract

In the study, the new hexa-bodipy functionalized dendrimeric cyclotriphosphazene conjugates (HBCP 1 and 2) have been successfully synthesized and characterized by using general spectroscopic techniques such as ¹H, ¹³C and ³¹P NMR spectroscopies. The photophysical and metal sensing properties in THF solutions of dendrimeric cyclotriphosphazene conjugates (HBCP 1 and 2) were investigated by UV-Vis and fluorescence spectroscopies in dilute tetrahydrofuran solutions. These dendrimers showed strong absorption bands 501 and 641nm at low concentration with high molar extinction coefficients. In addition, the stoichiometry of the complex between the conjugate (HBCP 2) and Co²⁺ ions were determined by a Job's plot obtained from fluorescence titrations. The metal sensing data showed that the hexa-bodipy functionalized dendrimeric cyclotriphosphazene conjugate (HBCP 2) is a candidate for fluorescent chemosensor for Co²⁺ ions due to showing high selectivity with a low limit of detection.

Keywords: Bodipy; Co(2+) ions; Cyclotriphosphazene; Fluorescent Chemosensor; Photophysical properties.