Reversing the Handedness of Self‐Assembled Porous Molecular Networks through the Number of Identical Chiral Centres. (2nd May 2019)

• Record Type: Journal Article
• Authors: Tahara, Kazukuni; Noguchi, Aya; Nakayama, Ruri; Ghijsens, Elke; De Feyter, Steven; Tobe, Yoshito
• Is Part Of: Angewandte Chemie. Volume 131:Number 23(2019)
• Page Start: 7815
• Page End: 7820
• Publication Date: 2019-05-02
• Subjects: Chiralität -- Dehydrobenzo[12]annulen -- Flüssig/Fest-Grenzflächen -- Rastertunnelmikroskopie -- Selbstorganisation; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201902565
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Scanning tunnelling microscope observations at the 1‐phenyloctane/graphite interface reveal how chiral structural information at the molecular level is transferred and expressed structurally at the 2D supramolecular level for a porous system. The chirality of self‐assembled molecular networks formed by chiral dehydrobenzo[12]annulene (cDBA) derivatives having three chiral chains and three achiral chains, alternatingly, is compared with those of cDBAs having six chiral chains reported previously. While for all cDBAs homochiral surfaces are formed, their handedness is not simply a reflection of the absolute configuration of the stereogenic centres. Both the number of stereogenic centres as well as the length of the achiral chains determine the supramolecular handedness, providing a deep insight into the supramolecular chirality induction mechanisms at play. Moreover, these cDBAs act to induce chirality in porous networks formed by achiral DBAs. Abstract : Rechts oder links? Die Zentren entscheiden : STM‐Messungen an der Flüssig/Graphit‐Grenzfläche offenbaren die Chiralität von selbstorganisierten porösen Molekülnetzwerken, die aus chiralen Molekülen mit drei chiralen und drei achiralen Ketten aufgebaut sind. Während homochirale Oberflächen für alle chiralen Moleküle gebildet werden, bestimmt die Zahl der stereogenen Zentren und die Länge der achiralen Ketten die supramolekulare Händigkeit.