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A rapidly-reversible absorptive and emissive vapochromic Pt(II) pincer-based chemical sensor

DOI: 10.1038/s41467-017-01941-2 DOI Help

Authors: M. J. Bryant (University of Bath) , J. M. Skelton (University of Bath) , L. E. Hatcher (University of Bath; Research Complex at Harwell) , C. Stubbs (University of Bath) , E. Madrid (University of Bath) , A. R. Pallipurath (University of Bath) , L. H. Thomas (University of Bath) , Ch. H. Woodall (University of Bath) , J. Christensen (Research Complex at Harwell) , S. Fuertes (University of Bath) , T. P. Robinson (University of Bath) , C. M. Beavers (Advanced Light Source, Lawrence Berkeley National Laboratory) , S. J. Teat (Advanced Light Source, Lawrence Berkeley National Laboratory) , M. Warren (Diamond Light Source) , F. Pradaux-caggiano (University of Bath) , A. Walsh (University of Bath) , F. Marken (University of Bath) , D. R. Carbery (University of Bath) , S. C. Parker (University of Bath) , N. B. Mckeown (University of Edinburgh) , R. Malpass-evans (University of Edinburgh) , M. Carta (University of Edinburgh) , P. R. Raithby (University of Bath)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Nature Communications , VOL 8

State: Published (Approved)
Published: December 2017

Open Access Open Access

Abstract: Selective, robust and cost-effective chemical sensors for detecting small volatile-organic compounds (VOCs) have widespread applications in industry, healthcare and environmental monitoring. Here we design a Pt(II) pincer-type material with selective absorptive and emissive responses to methanol and water. The yellow anhydrous form converts reversibly on a subsecond timescale to a red hydrate in the presence of parts-per-thousand levels of atmospheric water vapour. Exposure to methanol induces a similarly-rapid and reversible colour change to a blue methanol solvate. Stable smart coatings on glass demonstrate robust switching over 104 cycles, and flexible microporous polymer membranes incorporating microcrystals of the complex show identical vapochromic behaviour. The rapid vapochromic response can be rationalised from the crystal structure, and in combination with quantum-chemical modelling, we provide a complete microscopic picture of the switching mechanism. We discuss how this multiscale design approach can be used to obtain new compounds with tailored VOC selectivity and spectral responses.

Journal Keywords: Coordination chemistry; Electronic materials; Inorganic chemistry; Sensors

Subject Areas: Chemistry


Instruments: I24-Microfocus Macromolecular Crystallography

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s41467-017-01941-2.pdf