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Journal Articles Journal of Materials Chemistry C Year : 2015

Spin-crossover metal–organic frameworks: promising materials for designing gas sensors

Abstract

We present a quantitative study of the sensing behavior of micro-patterned gratings based on the metal–organic framework type spin crossover complex Fe(bpac)[Pt(CN)4] (1) in the presence of vapors of various organic compounds. The gratings of 1 were fabricated by combining a sequential assembly technique and a photolithographic method. The guest absorption driven change of the spin state and the associated variation of the refractive index were in situ monitored by optical diffraction on a grating of 1. Our sensor is characterized by good reversibility, room temperature operation, a low limit of detection (∼30 ppm for molecules of iodobenzene) as well as a linear dynamic range of detection (from 300 to 1500 ppm). The possibility of selectively desorbing the analytes by thermal annealing confers also selectivity to the sensor.
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Dates and versions

hal-01767586 , version 1 (16-04-2018)

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Carlos Bartual-Murgui, Amal Akou, Gábor Molnár, Christophe Thibault, Christophe Vieu, et al.. Spin-crossover metal–organic frameworks: promising materials for designing gas sensors. Journal of Materials Chemistry C, 2015, 3 (6), pp.1277 - 1285. ⟨10.1039/c4tc02441a⟩. ⟨hal-01767586⟩
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