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General Forums => Comments for Staff and Comments from Staff => Topic started by: Mitch on May 26, 2004, 05:35:11 PM

Title: Colours in Organic Chemistry: Predicting Colours
Post by: Mitch on May 26, 2004, 05:35:11 PM
One interesting example of taking the conjugation aspect of color to its limits is polyacetylene. Where you have a polymer with (-C=C-)n. The color of such a highly conjugated material is metallic metal! A very odd plastic indeed, I have been fortunate enough to see this polymer.
Title: Re:Colours in Organic Chemistry: Predicting Colours
Post by: Donaldson Tan on May 27, 2004, 12:09:01 AM
wow.. does it exhibit metallic properties?
Title: Re:Colours in Organic Chemistry: Predicting Colours
Post by: Mitch on May 27, 2004, 02:09:26 PM
Yup, the organic chemist won the nobel prize for it, it was relatively recent.
Title: Re:Colours in Organic Chemistry: Predicting Colours
Post by: Mitch on May 27, 2004, 02:10:27 PM
http://www.nobel.se/chemistry/laureates/2000/public.html
Title: Re:Colours in Organic Chemistry: Predicting Colours
Post by: Corvettaholic on May 27, 2004, 03:37:34 PM
Just got finished reading it, neat stuff. So it pretty much boils down a new plastic that can conduct electricity, right? One thing I was fuzzy on, does it ALWAYS conduct, or do you gotta do something special first? So lets say I get my hands on this new polymer, and hook up a battery and lightbulb to it. Will it work as a wire just like a copper wire would?
Title: Re:Colours in Organic Chemistry: Predicting Colours
Post by: Mitch on May 27, 2004, 09:18:21 PM
Yes it would.
Title: Re:Colours in Organic Chemistry: Predicting Colours
Post by: AWK on May 28, 2004, 05:23:42 AM
Will it work as a wire just like a copper wire would?  
Yes it would.  
But it's better to use even gold wire - it's cheaper (as yet?).
Title: Re:Colours in Organic Chemistry: Predicting Colours
Post by: Donaldson Tan on May 28, 2004, 09:18:03 AM
Polyacetylene is a semi conductor in its original form. U may either p-dope it (oxidise using halogen) or n-dope it (reduce it with an alkali metal) to produce the conductor form. I'm so impressed by its chemical properties. Moreover, once doped, its conductivity is comparable to Cu.  Can an organic polymer like this replace Germanium inside our CPU? Tjos would be amazing, if it's possible to synthesise raw material for making chips. I'm sure u all know how Si waffles are being made so slowly.
Title: Re:Colours in Organic Chemistry: Predicting Colours
Post by: Corvettaholic on May 28, 2004, 11:37:12 AM
I'm really liking this conducting polymer idea for magnetic reasons. Am I wrong in thinking polymer = plastic? This stuff would be perfect for another one of my invention ideas that I'll probably never get enough money to build.

Anyone know how magnetic gold is?
Title: Re:Colours in Organic Chemistry: Predicting Colours
Post by: Mitch on May 28, 2004, 01:09:10 PM
Anything that conducts electricity will generate a magnetic field. It's strength is dependent on the magnitude of the current flowing.

Polymer = plastic. It would feel just like what you would expect a plastic to feel like.
Title: Re:Colours in Organic Chemistry: Predicting Colours
Post by: Corvettaholic on May 28, 2004, 01:21:09 PM
Oh I know anything electricity flows though, a magnetic field follows. What I meant by magnetic, is that the polymer "wire" isn't metal, and less likely to be affected by an external field (as in yank it around) when its just chillin doing nothing. At least it seems like good logic to me.
Title: Re:Colours in Organic Chemistry: Predicting Colours
Post by: gregpawin on May 28, 2004, 09:22:04 PM
I severely doubt these being used for anything as complex as a processor.  Heat outputs from a chip would easily melt the polymer.  Also, current methods to produce fine structure in wafers wouldn't work on something with such a low melting point.  What they're moving towards is something with a high thermal conductivity... ie. diamond.  Perhaps one day they can make some pretty cool flexible lights.
Title: Re:Colours in Organic Chemistry: Predicting Colours
Post by: Mitch on May 31, 2004, 04:25:32 PM
The polymer is actually air sensitive too, and I doubt any industry wants to go back to vacuum tube technology.
Title: Re:Colours in Organic Chemistry: Predicting Colours
Post by: Donaldson Tan on May 31, 2004, 04:45:10 PM
The polymer is actually air sensitive too, and I doubt any industry wants to go back to vacuum tube technology.

 :blahblah1:

Imagine a liquid processor (not the usual solid). I can think of a use already, that it can flow thru capillary networks and receive information feedback on-the-move, whereby the network tunnels through a building.