Details

Autor(en) / Beteiligte

• Wagay, Shafieq Ahmad
• Ali, Rashid

Titel

Facile synthesis and anion binding studies of fluorescein/benzo-12-crown-4 ether based bis-dipyrromethane (DPM) receptors

Ist Teil von

• RSC advances, 2023-10, Vol.13 (43), p.342-3428

Ort / Verlag

Cambridge: Royal Society of Chemistry

Erscheinungsjahr

2023

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Two novel fluorescein as well as benzo-12-crown-4 ether functionalized dipyrromethane receptors ( DPM3 and DPM4 ) have successfully been synthesized. The anion (used as their TBA salts) binding studies of thus prepared DPM3 and DPM4 receptors were evaluated by the UV-visible spectrophotometric titrations. Binding affinities as well as the stoichiometry were determined through the UV-visible titrations data with the involvement of the BindFit (v0.5) package available online at https://supramolecular.org . Moreover, binding events were validated by means of the comparison of the partial 1 H-NMR spectrum of the simple host molecule with that of the host-guest complex, and the 1 : 1 stoichiometry were further confirmed by the Job's method of continuous variation. From the results, we observed the binding constant ( K a ) values of DPM3/DPM4 with various tested anions in the range of 516.07 M −1 to 63789.81 M −1 , depending upon the nature/shape/size of the anions. Moreover, the anion-π interactions were confirmed by the partial 1 H-NMR spectral data, and further supported by the literature reported systems. The authors hope that such types of valued receptors will be benefitted in future for the recognizing/binding of a variety of biologically important anions. Two novel fluorescein as well as benzo-12-crown-4 ether functionalized dipyrromethane receptors ( DPM3 and DPM4 ) have successfully been synthesized.