A multimodal study on the unique sensing behavior of a guest@metal-organic framework material for the detection of volatile acetone

DOI: 10.1002/admi.202201401

Authors: Annika F. Moeslein (University of Oxford) , Mario Gutierrez (University of Oxford) , Kirill Titov (University of Oxford) , Lorenzo Donà (Università di Torino) , Bartolomeo Civalleri (Università di Torino) , Mark D. Frogley (Diamond Light Source) , Gianfelice Cinque (University of Oxford; Diamond Light Source) , Svemir Rudic (ISIS Neutron and Muon Source) , Jin-Chong Tan (University of Oxford)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Advanced Materials Interfaces , VOL 112

State: Published (Approved)
Published: December 2022
Diamond Proposal Number(s): 14902 , 25407

Abstract: Owing to their unique functionalities and tailorable properties that are unattainable in conventional materials, metal-organic frameworks (MOFs) have emerged as candidate materials for next-generation chemical sensors and optoelectronics. For instance, the ZnQ@OX-1 composite material, comprising a light-emitting guest encapsulated in the pores of the OX-1 framework, affords excellent sensing performance: a visible color change upon exposure to volatile acetone. In this work, a multimodal study on the exceptional vapochromism of this composite material using high-resolution spectroscopy techniques based on inelastic neutron scattering and synchrotron radiation is presented, supported by density functional theory calculations. While FTIR spectroscopy in the far-IR and mid-IR regions reveals the underlying interactions between ZnQ, OX-1, and acetone, the limit of detection at 50 ppm is determined through in situ gas dosing experiments using fluorescence spectroscopy. In addition, in situ gas dosing on the single crystal level is achieved with near-field infrared nanospectroscopy.

Journal Keywords: gas dosing; inelastic neutron scattering; infrared spectroscopy; metal- organic frameworks; sensing mechanism

Subject Areas: Materials, Chemistry


Instruments: B22-Multimode InfraRed imaging And Microspectroscopy

Other Facilities: TOSCA at ISIS

Added On: 05/12/2022 09:38

Discipline Tags:

Chemistry Materials Science Metal-Organic Frameworks Metallurgy Organometallic Chemistry

Technical Tags:

Spectroscopy Infrared Spectroscopy Synchtron-based Fourier Transform Infrared Spectroscopy (SR-FTIR)