Spin-crossover metal-organic frameworks: promising materials for designing gas sensorsElectronic supplementary information (ESI) available. See DOI: 10.1039/c4tc02441a

• Main Authors: Bartual-Murgui, Carlos, Akou, Amal, Thibault, Christophe, Molnár, Gábor, Vieu, Christophe, Salmon, Lionel, Bousseksou, Azzedine
• Format: Journal Article
• Language: English
• Published: 29.01.2015
• ISSN: 2050-7526; 2050-7534
• DOI: 10.1039/c4tc02441a

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. 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.