Issue 7, 2024

Expanding the library of sumanene molecular receptors for caesium-selective potentiometric sensors

Abstract

This paper reports the synthesis and characterization of eight sumanene molecular receptors for the selective recognition of caesium cations (Cs+). The sumanene derivatives differed in the number (from one to nine), type (electron donating or electron withdrawing) and method of the attachment (functionalization of sumanene at the benzylic or aromatic carbons) of substituents in the sumanene skeleton. The ultimate goal of this work was to investigate the prospective use of various sumanene derivatives in the design of Cs+-selective potentiometric sensors, thus, expanding the library of sumanene receptors for such applications. Spectroscopic fluorescence titration with caesium hexafluorophosphate revealed that the formation of sandwich complexes is highly favourable, but the steric hindrance of bulky substituents can disrupt this preference. In the case of triaryl-substituted sumanene derivatives, theoretical calculations show that, indeed, sandwich complexes are energetically more advantageous by 2.3 times than 1 : 1 complexes. Furthermore, such functionalization significantly increases receptor solubility in the polymeric membrane of the potentiometric sensors, which was quantitatively evaluated with the COSMO model.

Graphical abstract: Expanding the library of sumanene molecular receptors for caesium-selective potentiometric sensors

Supplementary files

Article information

Article type
Paper
Submitted
20 Nov 2023
Accepted
08 Jan 2024
First published
09 Jan 2024
This article is Open Access
Creative Commons BY license

Dalton Trans., 2024,53, 2964-2972

Expanding the library of sumanene molecular receptors for caesium-selective potentiometric sensors

J. Ażgin, M. Wesoły, K. Durka, H. Sakurai, W. Wróblewski and A. Kasprzak, Dalton Trans., 2024, 53, 2964 DOI: 10.1039/D3DT03885H

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements