Microwave-Assisted Synthesis of DUT-52 and Investigation of Its Photoluminescent Properties

Abstract

A zirconium metal-organic framework (MOF) of DUT-52 (DUT: Dresden University of Technology) was synthesized herein by reacting zirconium tetrachloride (ZrCl4) and 2,6-naphthalenedicarboxylic acid (H2NDC) in DMF under microwave heating at 115 oC for 25 min. This synthetic procedure was more efficient than a solvothermal method, by which a long thermal exposure (24 h) of 100-150 oC was required to produce the same MOF. The MOF has a thermal stability of 560 °C, prior to partial loss of interconnected 2,6-naphthalenedicarboxylate (NDC) linkers at some structure building units (SBU). Crystallinity of this DUT-52 was ca. 77 %, which was the same as one synthesized solvothermally. Diffuse Reflectance UV-Vis spectra revealed an absorption at λex of 287 nm, which was equivalent to a bandgap energy of 4.32 eV. Electron excitations of this DUT-52 at 275 and 300 nm gave emission wavelength of 433 nm (a purple region), indicating a prospective use of DUT-52 as a photoluminescent material. Copyright © 2018 BCREC Group. All rights reservedReceived: 20th January 2018; Revised: 28th September 2018; Accepted: 30th September 2018; Available online: 25th January 2019; Published regularly: April 2019How to Cite: Kesuma, R.F., Patah, A., Permana, Y. (2019). Microwave-Assisted Synthesis of DUT-52 and Investigation of Its Photoluminescent Properties. Bulletin of Chemical Reaction Engineering & Catalysis, 14 (1): 124-129 (doi:10.9767/bcrec.14.1.2369.124-129)Permalink/DOI: https://doi.org/10.9767/bcrec.14.1.2369.124-129

The Properties of Microwave-Assisted Synthesis of Metal–Organic Frameworks and Their Applications

“…The presence of photo- luminescent centres in (La 0.9 Eu 0.1 and La 0.9 Tb 0.1 ) 3+ exhibited the photoluminescence properties of MOFs. In this line, another photoluminescent MOF, DUT-52, with high crystallinity was synthesised using MW within 25 min at 115 °C with terephthalic acid as a linker and Zn salt [ 48 , 49 , 50 ]. Optical properties were due to aromatic groups present in the molecule exhibiting photoluminescence at a wavelength higher than 287 nm.…”