Single-Walled Carbon Nanotube/Metalloporphyrin Composites for the Chemiresistive Detection of Amines and Meat Spoilage

• Published in: Angewandte Chemie Vol. 127; no. 22; pp. 6654 - 6657
• Main Authors: Liu, Sophie F., Petty, Alexander R., Sazama, Graham T., Swager, Timothy M.
• Format: Journal Article
• Language: English; German
• Published: Weinheim WILEY-VCH Verlag 26.05.2015; WILEY‐VCH Verlag; Wiley Subscription Services, Inc
• Subjects: Amine; Amines; Chemistry; Chickens; Cobalt; Detectors; Devices; Fish; Kohlenstoff-Nanoröhren; Meat; Moisture; Nanotechnology; Nanotubes; Porphyrinoide; Salmon; Sensoren; Single wall carbon nanotubes; Spoilage; Vapors
• ISSN: 0044-8249; 1521-3757
• DOI: 10.1002/ange.201501434

Chemiresistive detectors for amine vapors were made from single‐walled carbon nanotubes by noncovalent modification with cobalt meso‐arylporphyrin complexes. We show that through changes in the oxidation state of the metal, the electron‐withdrawing character of the porphyrinato ligand, and the counteranion, the magnitude of the chemiresistive response to ammonia could be improved. The devices exhibited sub‐ppm sensitivity and high selectivity toward amines as well as good stability to air, moisture, and time. The application of these chemiresistors in the detection of various biogenic amines (i.e. putrescine, cadaverine) and in the monitoring of spoilage in raw meat and fish samples (chicken, pork, salmon, cod) over several days was also demonstrated. Fleisch‐Messer: Chemoresistive Detektoren für Amine wurden aus einwandigen Kohlenstoff‐Nanoröhren durch nichtkovalente Modifizierung mit Cobalt‐meso‐arylporphyrinen hergestellt. Die Detektoren haben Sub‐ppm‐Empfindlichkeit, sind hoch selektiv für Amine und konnten verwendet werden, um das Verderben von Fleisch zeitlich zu verfolgen. −ΔG/G0=Leitfähigkeitsänderung bei Fleisch‐Exposition.