Methods and systems for measuring anions
Embodiments of the present disclosure provide for methods for detecting the presence and/or concentration of anions in a solution, systems for detecting the presence and/or concentration of anions in a solution, anion sensor systems, and the like.
1. A method of detecting anions, comprising:
contacting a solution including an anion with a Pt(II) porphyrin;
irradiating the solution with visible light;
measuring a photoluminescence signal from the Pt(II) porphyrin; and
determining the presence of the anion;
wherein the Pt(II) porphyrin is 5, 10, 15, 20-tetra(1-methyl-4-pyridino)-porphyrin Pt(II) tetrachloride.
2. The method of claim 1 , wherein the anion is selected from the group consisting of: a halogen anion, a sulfide anion, and a cyanide anion.
3. The method of claim 1 , wherein the anion is iodide.
4. The method of claim 3 , wherein the anion is present at a level of at least about 30 pmol in the solution.
5. The method of claim 1 , further comprising: measuring a UV-Vis signal.
6. A sensor system, comprising:
a structure having a Pt(II) porphyrin disposed on the surface;
a compartment including a solution including an anion, wherein the anion is selected from the group consisting of a halogen anion, a sulfide anion, and a cyanide anion, wherein the anion and Pt(II) porphyrin interact to quench the photoluminescence of the Pt(II) porphyrin once the structure is placed in the compartment with the solution;
a system for irradiating the solution with visible light; and
a system for measuring a signal selected from a photoluminescence signal, UV-Vis signal, or a combination thereof, wherein a change in the signal relative to a signal without the anion present is correlated to the concentration of the anion in the solution.
7. The system of claim 6 , wherein the anion is present at a level of at least about 30 pmol in the solution.
8. The system of claim 6 , wherein the Pt(II) porphyrin is 5, 10, 15, 20-tetra(1-methyl-4-pyridino)-porphyrin (Pt(II) tetrachloride.
9. A method comprising, comprising:
placing a structure having a Pt(II) porphyrin disposed on the surface in a compartment including a solution including an anion, wherein the anion is selected from the group consisting of a halogen anion, a sulfide anion, and a cyanide anion, wherein the anion and Pt(II) porphyrin interact to quench the photoluminescence of the Pt(II) porphyrin;
irradiating the solution with visible light; and
measuring a signal selected from a photoluminescence signal, UV-Vis signal, or a combination thereof, wherein a change in the signal relative to a signal without the anion present is correlated to the concentration of the anion in the solution.
10. The method of claim 9 , wherein the anion is present at a level of at least about 30 pmol in the solution.
11. The method of claim 10 , wherein the Pt(II) porphyrin is 5, 10, 15, 20-tetra(1-methyl-4-pyridino)-porphyrin (Pt(II) tetrachloride.