Detection of amines
A sensor can include a conductive region in electrical communication with at least two electrodes, the conductive region can include a complex, and the complex can include a carbon nanotube that is functionalized by a porphyrin.
1. A sensor comprising:
a conductive region in electrical communication with at least two electrodes, the conductive region including a complex, wherein the complex includes pristine single-walled carbon nanotubes that are functionalized by a porphyrin, wherein the porphyrin includes a sterically protected electron-deficient metal center and arranged to detect less than 0.5 ppm NH 3 due to proximity the electrophilicity of the metal center toward amines arranged to be enhanced through both a fluorinated porphyrin ligand and a coordinating counter anion.
2. The sensor of claim 1 , wherein the porphyrin includes a cobalt porphyrin.
3. The sensor of claim 1 , wherein the cobalt porphyrin includes a Co 3+ .
4. The sensor of claim 1 , wherein the cobalt porphyrin includes a Co 2+ .
5. The sensor of claim 1 , wherein the carbon nanotubes are non-covalently functionalized by the porphyrin.
6. The sensor of claim 1 , wherein the carbon nanotubes are covalently functionalized.
7. The sensor of claim 1 , wherein the complex includes a cobalt meso-arylporphyrin complex.
8. The sensor of claim 1 , wherein the complex includes a meso-tetrakis(pentafluorophenyl)porphyrinato.
9. The sensor of claim 1 , wherein the complex includes a meso-tetraphenylporphyrinato.
10. The sensor of claim 1 , wherein the complex includes a meso-arylporphyrin.
11. The sensor of claim 1 , wherein the porphyrin includes a ClO 4 − .
12. The sensor of claim 1 , wherein the porphyrin includes a BF 4 − .
13. The sensor of claim 1 , wherein the porphyrin includes a Cl − .
14. A food packaging comprising a sensor, wherein the sensor includes a conductive region in electrical communication with at least two electrodes, the conductive region including a complex, wherein the complex includes pristine single-walled carbon nanotubes that are functionalized by a porphyrin, wherein the porphyrin includes a sterically protected electron-deficient metal center and arranged to detect less than 0.5 ppm NH 3 due to proximity the electrophilicity of the metal center toward amines arranged to be enhanced through both a through both a fluorinated porphyrin ligand and a coordinating counter anion.