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COF-LZU-1 [(TFB)2(PDA)3]imine carrier for pH-controlled drug delivery

Gagandeep Kaur and Pawan Kumar

Material Application Research Lab. (MARL), Department of Nano Science and Materials, Central University of Jammu, Rahya Suchani, India



Received: 19 December 2022  Accepted: 21 December 2023


A porous covalent organic framework, COF-LZU-1 [(TFB)2(PDA)3]imine has been synthesized using 1,3,5-trisformylbenzene (TFB) and p-Phenylenediamine (p-PDA) in 1–4 Dioxane via Schiff base condensation reaction. The obtained crystalline material has been analyzed through X-ray diffraction, scanning electron microscopy, UV–Vis/photoluminescence spectroscopy, and Brunauer–Emmett–Teller (BET) surface area analyzer. After confirmation of the crystalline structure and hexagonal geometry of COF-LZU-1, the potential of COF for pH-controlled drug delivery has been demonstrated using spectroscopic techniques. The drug release profiles were estimated by varying pH values of 5.8, 6.8, and 7.4. The findings suggest maximum drug release % at pH-5.8 (90%) and minimum at pH-7.4 (24%), respectively. Overall, we have found out that the acidity of the medium has greatly influenced drug kinetics. Our primary spectroscopic results exhibit good estimation of drug loading and release profile in PBS buffer under variable pH.

Graphical abstract

Keywords: COF-LZU-1; Drug delivery applications; Ibuprofen; IBU@COF-LZU-1

Full paper is available at

DOI: 10.1007/s11696-023-03290-5


Chemical Papers 78 (5) 3023–3032 (2024)

Sunday, May 26, 2024

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