franklyn
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Supramolecular chemistry
I found this online while researching ozonolyses of polystyrene
mobius molecules _
http://walba.colorado.edu/2000_Chem_6321/PDF%20Files/Mo%CC%8...
protein with a twist _
http://www.expasy.org/spotlight/back_issues/sptlt020.shtml
Although he is usually given credit for the discovery of the band named after him, August Ferdinand
Möbius was actually the second person to publish it's description. The mathematician Johann Benedict
Listing described the band in correspondance from 1858 to 1861, four years before Mobius.
To make a mobius strip take a length of narrow paper ribbon (14 inch legal pad is good for length )
twist one end over so what was face up is now facing down. Bring the ends together with the twist
like that and tape them to form a loop. If you draw a line down the center along its length until you
come back to the place you started drawing and cut the strip with scissors along this line, you end
up with a strip that is twice the circumference but it now has one complete twist. If you once again
cut this into two along its length, you now end up with two separate linked loops each with a full
twist. A variation of this is to draw two parallel lines along the length of a mobius strip dividing it in
thirds and cut along one of the lines, you will have gone twice around cutting along both parallel
lines to produce two loops linked together, one is twice the circumfrence of the other and now has
a full twist yet the smaller still retains a half twist.
To keep your sanity just watch this video instead _
http://www.metacafe.com/watch/331665/no_magic_at_all_mobius_...
This highlights the prospect of producing material similar to
medieval chain mail armor but made up of molecular links.
http://en.wikipedia.org/wiki/Chain_mail
http://en.wikipedia.org/wiki/Molecular_knot
http://en.wikipedia.org/wiki/Knotane
http://en.wikipedia.org/wiki/Mechanically-interlocked_molecu...
http://en.wikipedia.org/wiki/Molecular_Borromean_rings
http://en.wikipedia.org/wiki/Catenane
U P D A T E _ 07/04/24
Micro chain-mail fabric made _
http://www.whatsnextnetwork.com/technology/index.php/2007/03...
.
[Edited on 24-4-2007 by franklyn]
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Pyridinium
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Fascinating stuff. I also find "molecular baskets" intriguing. The recent J.Am.Chem.Soc. has something on baskets. They open and close.
One more thing to add to my list of topics to try making into mad science experiments, even if only tangentially.
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woelen
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This mobius strip stuff is amazing, especially the cutting of the strip into smaller strips. Something very nice to do with kids.
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suprachem
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http://www.ismsc.org/index.html
The first Joint International Symposium on Macrocyclic & Supramolecular Chemistry, was held June 25-30, 2006 in Victoria, British Columbia,
Canada.
The Joint International Symposium on Macrocyclic and Supramolecular Chemistry (ISMSC) is the first joint meeting of two symposia that have played key
roles in creating one of the most stimulating and productive areas of modern chemistry. These two symposia – the International Symposium on
Macrocyclic Chemistry (ISMC - next to be held in 2007 in Salice Terme, Italy) and the International Symposium on Supramolecular Chemistry (ISSC) –
have witnessed many of the key fundamental results that have laid the cornerstone science on which modern supramolecular chemistry is built. Novel
applications have never been far from discussion at either meeting.
The next joint ISMSC will be held in 2008 at a location yet to be determined (likely Las Vegas, NV)
Conference Site
The meeting will be held in the Victoria Conference Center in downtown Victoria. The lecture theatre offers comfortable seating and state-of-the-art
audio-visual facilities. The conference center will also be the site for the registration and the poster sessions. Lunches will be provided with the
registration, and will be served in the conference center dining room.
The pdf files below are intended as an online primer for supramolecular chemistry, and can be downloaded and used for any reasonable educational
purpose.
ISMSC 2006 Victoria – Student Workshops in Supramolecular Chemistry
Anion Recognition – Philip Gale, Univ. of Southampton
Physical Aspects of Supramolecular Chemistry – Angel Kaifer, Univ. of Miami
Metallosupramolecular Chemistry – George Shimizu, Univ. of Calgary and Garry Hanan, Univ. de Montréal
Creation of Supramolecular Sensors – Eric Anslyn, Univ. of Texas
Supramolecular Chemistry Involving Bilayer Membranes – Brad Smith, Notre Dame
Applications of Supramolecular Chemistry Principles to Solvent Extraction of Cations and Anions – Karsten Gloe, Tech. Uni. Dresden
ISSC 2004 Notre Dame – NSF Workshops on Supramolecular Chemistry
Molecular capsules – J. Atwood
Anion Recognition – K. Bowman-James
Fluorescent Sensors – A.P. de Silva
Nanotechnology – D. Fitzmaurice
Membrane Transport – T. Fyles
Foldamers – S.H. Gellman
Ion Recognition – G.W. Gokel
Mechanically-Interlocked Architectures – D. Leigh
Metal-Based Self-Assembly – L.F. Lindoy
[Edited on 21-5-2007 by suprachem]
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Chemophiliac
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Does anyone have a procedure for synthesizing these things? I'm especially interested in making some molecular Borromean rings complexed with zinc or
other metals with coordination number 4 and tetrahedral type structure.
Look at the wikipedia link, this is the type of stuff I'm talking about-
http://en.wikipedia.org/wiki/Molecular_Borromean_rings
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suprachem
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maybe this useful for you
http://chem8.org/bbs/viewthread.php?tid=1611&page=1&...
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