In situ formation and dispersion of lanthanide complexes in wormlike micelles

Abstract

Lanthanide-containing, water-based fluids normally suffer from low photoluminescent (PL) and/or colloidal stability, which greatly hinders their applications. Herein, we report the preparation of PL fluid which contains in situ formed europium complexes in aqueous solution. The strategy first relies on the construction of wormlike micelles by mixing a zwitterionic surfactant (tetradecyldimethylaminoxide, C14DMAO) and a tridentate ligand for lanthanide cation (2,6-dipicolinic acid, DPA) in water. The addition of the dual-functionalized DPA to aqueous solution of C14DMAO (100 molL-1) induced non-monotonic rheological changes, with the expected formation of pseudogemini surfactant at a DPA-to-C14DMAO molar ratio of approximately 1:2. When a third component of EuCl3 is introduced to this system, complexes formed in situ between Eu3+ and DPA, resulting in bright red-emission. Besides DPA, C14DMAO also attends in the complexation, which squeezes out water molecules and greatly improves the PL stability of the fluid. The synergetic effect among Eu3+, DPA and C14DMAO leads to high colloidal stability of the fluid, opening the door for a wide range of potential applications. Further tests indicate that this strategy can be easily expanded to other lanthanide cations such as Tb3+.

Supplementary files

Article information

Article type
Paper
Submitted
25 May 2022
Accepted
22 Jun 2022
First published
22 Jun 2022

Soft Matter, 2022, Accepted Manuscript

In situ formation and dispersion of lanthanide complexes in wormlike micelles

N. Feng, P. li, A. Xu, L. Yu and H. Li, Soft Matter, 2022, Accepted Manuscript , DOI: 10.1039/D2SM00687A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements