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author:

Teichmann, Ben (Teichmann, Ben.) [1] | Krause, Ana-Maria (Krause, Ana-Maria.) [2] | Lin, Mei-Jin (Lin, Mei-Jin.) [3] | Würthner, Frank (Würthner, Frank.) [4]

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EI

Abstract:

Enantioselective molecular recognition of chiral molecules that lack specific interaction sites for hydrogen bonding or Lewis acid–base interactions remains challenging. Here we introduce the concept of tailored chiral π-surfaces toward the maximization of shape complementarity. As we demonstrate for helicenes it is indeed possible by pure van-der-Waals interactions (π–π interactions and CH–π interactions) to accomplish enantioselective binding. This is shown for a novel benzo[ghi]perylene trisimide (BPTI) receptor whose π-scaffold is contorted into a chiral plane by functionalization with 1,1′-bi-2-naphthol (BINOL). Complexation experiments of enantiopure (P)-BPTI with (P)- and (M)-[6]helicene afforded binding constants of 10 700 M−1 and 550 M−1, respectively, thereby demonstrating the pronounced enantiodifferentiation by the homochiral π-scaffold of the BPTI host. The enantioselective recognition is even observable by the naked eye due to a specific exciplex-type emission originating from the interacting homochiral π-scaffolds of electron-rich [6]helicene and electron-poor BPTI. © 2022 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH.

Keyword:

Enantioselectivity Hydrogen bonds Molecular recognition Polycyclic aromatic hydrocarbons Scaffolds Stereochemistry Van der Waals forces

Community:

  • [ 1 ] [Teichmann, Ben]Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg, Am Hubland, Würzburg; 97074, Germany
  • [ 2 ] [Teichmann, Ben]State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, 350116, China
  • [ 3 ] [Krause, Ana-Maria]Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg, Am Hubland, Würzburg; 97074, Germany
  • [ 4 ] [Lin, Mei-Jin]State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, 350116, China
  • [ 5 ] [Würthner, Frank]Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg, Am Hubland, Würzburg; 97074, Germany

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Source :

Angewandte Chemie - International Edition

ISSN: 1433-7851

Year: 2022

Issue: 15

Volume: 61

1 6 . 6

JCR@2022

1 6 . 1 0 0

JCR@2023

ESI HC Threshold:74

JCR Journal Grade:1

CAS Journal Grade:1

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count: 14

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 3

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