2018/12/31 by Zheng Meng, Aylin Aykanat, Katherine A. Mirica · 2 citations
Chemistry · Engineering · Materials Science · #Metal-Organic Frameworks: Synthesis and Applications #Gas Sensing Nanomaterials and Sensors #Porphyrin and Phthalocyanine Chemistry
paper · doi:10.1021/jacs.8b11257
openalex publication_date 2018/12/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/02
This paper describes the first demonstration of using a series of isoreticular nickel phthalocyanine- and nickel naphthalocyanine-based bimetallic conductive two-dimensional (2D) metal–organic frameworks (MOFs) as active materials in chemiresistive sensing of gases. Devices achieve exceptional sensitivity at sub-part-per-million (ppm) to part-per-billion (ppb) detection limits toward NH 3 (0.31–0.33 ppm), H 2 S (19–32 ppb), and NO (1.0–1.1 ppb) at low driving voltages (0.01–1.0 V) within 1.5 min of exposure. The devices maintain their performance in the presence of humidity (5000 ppm of H 2 O). The isoreticular analogs enable modular control over selectivity and sensitivity in gas sensing through different combinations of linkers and metal nodes. Electron paramagnetic resonance spectroscopy and X-ray photoelectron spectroscopy studies suggest that the chemiresistive response of the MOFs involves charge transfer interactions triggered by the analytes adsorbed on MOFs.