Issue 47, 2021

Stable hydrogen-bonded organic frameworks for selective fluorescence detection of Al3+ and Fe3+ ions

Abstract

Four new hydrogen-bonded organic frameworks (HOFs) with the formulas {[H4TCPE·bpa]·(CH3OH·H2O)}n (1), {[H4TCPE·bpe]·(CH3OH·0.56H2O)}n (2), {[H4TCPE·bpa]·CH3OH}n (3) and {[H4TCPE·bpe]·(0.41CH3OH·0.59CH3CN)}n (4) (H4TCPE = tetrakis(4-carboxyphenyl)ethylene, bpa = 1,2-bis(4-pyridyl)ethane, bpe = 1,2-bis(4-pyridyl)ethylene) have been prepared under different conditions and structurally characterized. X-ray crystallographic analysis reveals that the hydrogen bond strengths of 3 and 4 synthesized by solvothermal method are much stronger than those of 1 and 2 prepared by the volatilization method. An obvious fluorescence shift was observed during the sensing process of 3 and 4 toward Al3+ and Fe3+ ions. For HOF 3, a red-shift emission (ca. 28 nm) occurs upon the addition of Al3+ ion. When Al3+ ion is added to HOF 4 in acetonitrile suspension, a red-shift emission (ca. 30 nm) as well as a great fluorescence enhancement happens. Both 3 and 4 exhibit strong fluorescence quenching with high selectivity and sensitivity toward Fe3+ ion. In addition, they display relatively good stabilities as well as reusability. Therefore, HOFs 3 and 4 are excellent fluorescent sensors toward Al3+ and Fe3+ ions.

Graphical abstract: Stable hydrogen-bonded organic frameworks for selective fluorescence detection of Al3+ and Fe3+ ions

Supplementary files

Article information

Article type
Paper
Submitted
02 sept. 2021
Accepted
28 oct. 2021
First published
02 nov. 2021

CrystEngComm, 2021,23, 8334-8342

Stable hydrogen-bonded organic frameworks for selective fluorescence detection of Al3+ and Fe3+ ions

C. Xiao, W. Yi, J. Hu, S. Liu and H. Wen, CrystEngComm, 2021, 23, 8334 DOI: 10.1039/D1CE01182K

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