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SUMMARY:Supramolecular Control: Strategic Uses of Carbon Nanohoops\, Fluor
 inated Cyclohexanes and Organophosphates - Prof. Max von Delius\, Institut
 e of Organic Chemistry\, Ulm University
DTSTART:20230824T130000Z
DTEND:20230824T140000Z
UID:TALK203188@talks.cam.ac.uk
CONTACT:Sharon Connor
DESCRIPTION:In this talk\, I will present recent work by our group on the 
 use of supramolecular chemistry to address challenges in synthesis\, mater
 ials science and systems chemistry. Control over the selectivity of fuller
 ene bis-addition reactions was achieved by encapsulating C60 in a three-sh
 ell complex (“Russian Doll”). Thanks to the combined template effects 
 of a self-assembled cage and nanohoop [10]CPP\, [1] the C60 trans-3 bis-ad
 duct (Fig. 1 attached) was obtained with ideal chemo-\, itero- and regiose
 lectivity\, [2] which has recently enabled the synthesis of unprecedented 
 C60/[10]CPP [2]catenanes. [3] Control over the length of self-assembled na
 nofibers was achieved by the living supramolecular polymerization of all-c
 is fluorinated cyclohexanes. [4] The exceptionally high dipole moment of t
 he C6H6F5OR motif gave rise to folded monomers that only polymerized into 
 nanofibers of double-helical topology upon addition of seeds. Control over
  the persistence of supramolecular assemblies over time was achieved in ch
 emically-fuelled phosphoramidate[5] and acylphosphate[6] systems. Generati
 ng chemically driven steady states from organophosphates is far from trivi
 al\, but holds great promise for the creation of chemically-driven molecul
 ar machines and transient self-assemblies.\n\nReferences \n1 Y. Xu\, M. vo
 n Delius\, Angew. Chem. Int. Ed. 2020\, 59\, 559. \n2 Y E. Ubasart\, O. Bo
 rodin\, M. von Delius\, X. Ribas et al. Nat. Chem. 2021\, 13\, 420. \n3 F.
  Steudel\, G. Pavan\, X. Ribas\, M. von Delius et al. Angew. Chem. Int. Ed
 . 2023 pending minor revisions. \n4 O. Shyshov\, G. M. Pavan\, M. von Deli
 us et al. Nat. Commun. 2021\, 12\, 3134. \n5 A. Englert\, M. von Delius et
  al. J. Am. Chem. Soc. 2022\, 144\, 15266. \n6 A. Englert\, M. von Delius 
 et al. ChemRXiv 2023\, DOI: 10.26434/chemrxiv-2023-5j129\n\n
LOCATION:Dept of Chemistry\, Wolfson Lecture Theatre 
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