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Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: agalev on March 27, 2015, 12:44:46 PM

Title: conjugated polymers/materials
Post by: agalev on March 27, 2015, 12:44:46 PM

Hey,

I'm having a problem for some time finding out which of these materials are conjugated polymers and which aren't.

Can somebody please help me?
I know it has something to do with pi-bounds but I can't find an answer to which are the conjugated polymers

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great thanks to anyone who could help me out!

Title: Re: conjugated polymers/materials
Post by: Arkcon on March 27, 2015, 01:07:35 PM

Yes, conjugated pi bods does have "something" to do with pi bods.  Can you recheck you class notes or textbook what exactly what?  This is a pretty simple definition question.  There's not much of a hint or help we can give you.

Title: Re: conjugated polymers/materials
Post by: agalev on March 28, 2015, 11:00:14 AM

Yeah I checked the definition, but how do I know in the examples which of these polymers have pi bonds?

Title: Re: conjugated polymers/materials
Post by: Arkcon on March 28, 2015, 02:13:05 PM

Quote from: agalev on March 28, 2015, 11:00:14 AM

Yeah I checked the definition, but how do I know in the examples which of these polymers have pi bonds?

From the definition:  http://en.wikipedia.org/wiki/Pi_bond#Multiple_bonds

Title: Re: conjugated polymers/materials
Post by: samyukth on May 09, 2015, 11:03:55 AM

Organic PV right? Even im finding answers for it. There is no enough information given to attend the question.

Title: Re: conjugated polymers/materials
Post by: kriggy on May 09, 2015, 11:10:36 AM

Quote from: samyukth on May 09, 2015, 11:03:55 AM

Organic PV right? Even im finding answers for it. There is no enough information given to attend the question.

Wait what? Out of all those compounds, there are only two that are polymers...

Agalev:
single bond = sigma bond
double bond = sigma bond + pi bond
tripple bond = sigma bond + two pi bonds

there is a question: what does it mean than bonds are conjugated? can you give a example of compound with cojugated bonds?

Title: Re: conjugated polymers/materials
Post by: masaa on May 26, 2015, 02:15:32 PM

single bond followed by double bond followed by single bond...etc.
the lower band gap the higher conjugated polymer.