Chlorophyll Problem

Chlorophyll can be extracted and has been done so. You can check out the following document for a simple lab extraction from spinach:
http://facstaff.bloomu.edu/pugh/Experiment2.pdf

You will need PDF viewer to see that.

Regarding CO2 conversion, I'm afraid that is not possible with just chlorophyll alone. First of all, there are more than just 1 type of chlorophyll. Secondly, there are more than just chlorophyll to convert CO2 to sugar. A simple description of this complex process is in wiki:
http://en.wikipedia.org/wiki/Chlorophyll