Electrochemical detection of carbon dioxide using a carbohydrate based coordination polymer
An electrochemical sensor for an analyte is provided. The electrochemical sensor includes CDMOF-2. The CDMOF-2 is capable of binding reversibly to CO 2 as an analyte, thereby quantitatively detecting the analyte in a mixture. The CDMOF-2 is formed from reaction of γ-cyclodextrin with RbOH in the presence of methanol.
1. An electrochemical sensor composition for sensing an analyte, wherein the electrochemical sensor composition consists of CDMOF-2 being electrically contacted with indium-coated copper wire and conductive silver epoxy, wherein the CDMOF-2 has a crystalline matrix in a pellet form.
2. The electrochemical sensor composition of claim 1 , wherein the analyte comprises CO 2 .
3. The electrochemical sensor composition of claim 1 , wherein CDMOF-2 is prepared according to the process comprising:
forming an aqueous mixture of g-cyclodextrin and RbOH; and
vapor-diffusing methanol into the aqueous mixture.
4. The electrochemical sensor composition of claim 2 , wherein the CO 2 resides in a medium.
5. The electrochemical sensor composition of claim 4 , wherein the medium comprises a gas phase selected from air, air/H 2 O mixture, air/O 2 mixture and CO 2 /N 2 mixture.
6. The electrochemical sensor composition of claim 4 , wherein the medium comprises a gas phase consisting of CO 2 /N 2 mixture.
7. The electrochemical sensor composition of claim 6 , wherein the sensor displays a ratiometric response to an amount of CO 2 present in the gas phase.
8. The electrochemical sensor composition of claim 7 , wherein the amount of CO 2 present in the gas phase ranges from about 0% to about 100% CO 2 .
9. The electrochemical sensor composition of claim 1 , wherein the CDMOF-2 displays a conductivity decrease after CO 2 sorption.