Gooferking Science
Hazard to Self
Posts: 97
Registered: 17-7-2013
Location: Somewhere in Kansas, USA...
Member Is Offline
Mood: Halogenated
|
|
Chlorophyll Uses and Reactions
I recently extracted a bunch of chlorophyll from leaves and I am unsure what to do with it. I already put it under UV light and watched it glow red. I
was thinking about reacting it with bromine. There are a bunch of double bonds where the bromine could do a nucleophilic reaction at. What would the
resultant molecule be though? Anyway, I am open to any suggestions of what to do with it.
|
|
|
Texium
Administrator
Posts: 4508
Registered: 11-1-2014
Location: Salt Lake City
Member Is Offline
Mood: PhD candidate!
|
|
Whatever you do with it, try to do it fairly soon, as chlorophyll gets nasty, brown, and decayed after a couple days.
|
|
|
smaerd
International Hazard
Posts: 1262
Registered: 23-1-2010
Member Is Offline
Mood: hmm...
|
|
I actually read a pretty interesting Honor's Thesis in the recent past about making a little very temporary solar cell from essentially chlorophyll
and a copper plate - http://dspace.nelson.usf.edu/xmlui/bitstream/handle/10806/66...
Could be a neat little experiment.
|
|
|
gdflp
Super Moderator
Posts: 1320
Registered: 14-2-2014
Location: NY, USA
Member Is Offline
Mood: Staring at code
|
|
Looks interesting, but the chlorophyll-ethanol extraction mentioned seems to need a long time. I have had success in the past by extraction with
acetone, then using paper chromatography to separate the different components completing the process in an hour. How did you extract yours
Gooferking?
|
|
|
Gooferking Science
Hazard to Self
Posts: 97
Registered: 17-7-2013
Location: Somewhere in Kansas, USA...
Member Is Offline
Mood: Halogenated
|
|
I just used boiling denatured alcohol (ethanol, methanol, methyl isobutyl ketone) as an organic solvent. I used sweet gum leaves which contain a lot
of chlorophyll as a source. I made sure to boil the flammable alcohol in a fume hood with an electric heater to ensure no explosions occurred from
alcohol vapor. I then filtered the very dark green liquid to remove insoluble materials. I tested for chlorophyll by putting the solution produced
under UV light. It glowed dark red, which is characteristic of chlorophyll.
|
|
|
alexleyenda
Hazard to Others
Posts: 277
Registered: 17-12-2013
Location: Québec, Canada
Member Is Offline
Mood: Busy studying chemistry at the University
|
|
Just in case you didn't know, as you didn't separate the mixture, you also have a good amount of carotenoids, not only chlorophyll. And well, honestly
I don't think there is much to do with it, maybe you could just push the experiment on the side of physics and test different wavelenghts to see which
one are absorbed and which are not.
Also, it's not an experiment, but it's interesting to realise that as it absorbs UV light and emmits red, it means that all the energy difference from
the bottom (red) to the top (blue) of the visible electromagnetic spectrum was absorbed by the the pigment, it is very efficient. That's why it is
used by plants to make Adenosine triphosphate, so they can make sugar, so we can live  And of course, a side product of this process is O2 by hydrolysis of water. The hydrogens from the water being used to reduce the CO2 from
the air in hydrocarbon chains (sugars in this case).
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
