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Concerning the physical Properties of Carbynes


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interesting empirical aspects of the Pollyanna and theory the absorption of light and despite the the conjugated structure it's really only once 1 gets past about 20 carbon Dedekind day actually start absorbing in the visible regions so that shoulder derivatives are usually ,comma all or slightly yellow army even so although they very distinctive absorption spectra so you can see that a very distinctive pattern of almost look like fingers of the vibrational structures so it's quite easy to to identify them in solution by this this basic framework that's actually 1 of the methods that chemists used to identify Pollyanna natural products in many different services both plants and in marine organisms and distinctive you his absorption as 1 goes outside of this the shorter range and they do become college in many cases because they have huge Moeller objectivity so the land values there almost a million and so from a small molecules such as such a huge Moeller objectivity in itself is is quite interesting and so I should go beyond the 12 acetylene 14 acetylene to start to take on a yellow to a yellow-orange color and then a rather beautiful progression from yellow to orange to to almost ready to get to the longer derivatives but this is actually quite in contrast to too many other conjugated polygamous and polymers and even you know for example graphing or the full range we have a beautiful purple color because you have a low energy absorption at 600 years 615 animators and the polyamide even in the in car-buying the expected it's that absorbency is about 480 animators into just barely into the visible region so said that the polymer the infinite polymers probably only going to be a red material rather than beautiful purple that 1 would come to expect with a very conjugated only merit system if so
that the I guess the big question is always winemaker minor what might be useful for and that's a pretty difficult question today answers that at this point because that is the challenge really was the synthesis and and we now we have the ability to start thinking about what we might do do with but there are several obvious things that that we look at right now and the 1st thing that comes to to mind is is if you look at this museum elected white Suvaree conjugated molecule that should very easily be able to conduct electricity from 1 end to another and so 1 of the Goals that we have working with the physics student at the University of Maryland could really make a device that's made up of carbon allotropes Seoul if you imagine taking a segment of graphene cutting a hole in graphene original graphene which would basically formed 2 electrodes out of graphene what we're trying to do is to take our Pollyanna put a full arena on each end of the polyamide which would act as there are alligator clips for a way to connect to the electrodes and then set this molecular wire down onto a gap of graft on it as a molecular wire it's it's really this is the perfect molecular weight because no matter how you rotate around any of these bonds maintain conjugation maintain a linear structure you maintain orientation minutes not flopping around it can bend very well and so it's really has it has a huge potential as well as a single a single molecular species as as waiters and another thing that this this is quite an interesting aspect for using these Cuisinart precursors to other Carbonell tropes and so that the current hypothesis so 1 of the current hypotheses for the formation of fullerenes in international Tutu said that in the gas phase small segments of of carbon come together to form polyamide in the gas phase these politicians grow until they reach approximately the length of 20 carbons and then the cycle lies in the Pollyanna rings 3 times 20 then gives you see 60 and there's a mechanism that you can show all How will ring of 60 carbon atoms in the center can coalesce into a 61 of the the groups that we use right now and the end these super travel groups and the Travel Group is a well known leaving group in organic chemistry at least either as a radical or as a cobble can and the Super travel groups that we have on should still function as a leading group and so what we're working toward right now is to put these down on the surface and and then through some kind of external stimulation that could be heeded could be an ionized gas could be light can we not least groups off of the Holly and segment on the surface and generate 20 carbons 40 Carbon 60 carvings on the surface the molecule is now on the surface with a lot of energy associated with it will it actually form see 60 on the surface of a fatal PG & can we watch this mechanism in real time by scanning with STM on begin reform hybrid systems can we can reuse several aligned on surface into using most likely an ionized gas can we cross-link them on and have them build up segments of nanotubes Tennessee misses losses of a wide range of of of surface chemistry that we think we can do using its precursors pure carbon segments there are more 1 doesn't have to remove protons to ultimately get the hell out of I and that was
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Formal Metadata

Title Concerning the physical Properties of Carbynes
Title of Series Chymiatrie
Author Tykwinski, Rik
Jerabek, Paul
Hegemann, Julian
Authmann, Andreas
License CC Attribution - NonCommercial - ShareAlike 3.0 Germany:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor and the work or content is shared also in adapted form only under the conditions of this license.
DOI 10.5446/18752
Publisher Paul Jerabek, Julian Hegemann, Andreas Authmann
Release Date 2011
Language English

Content Metadata

Subject Area Chemistry
Abstract Prof. Tykwinski (University of Erlangen) tells us more about the physical properties of Carbynes (sp-hybridized carbon).
Keywords Organik

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