Solvent Clathrate Driven Dynamic Stereomutation of a Supramolecular Polymer with Molecular Pockets
作者:Chidambar Kulkarni、Peter A. Korevaar、Karteek K. Bejagam、Anja R. A. Palmans、E. W. Meijer、Subi J. George
DOI:10.1021/jacs.7b07639
日期:2017.10.4
understand the phenomena at a molecular level are scarce. Here we present a unique example of helix reversal (stereomutation) under thermodynamic control in the self-assembly of a coronenebisimide that has a 3,5-dialkoxy substitution on the imide phenyl groups (CBI-35CH), leading to "molecular pockets" in the assembly. The stereomutation was observed only if the CBI monomer possesses molecular pockets.
Alkyl esters, imides and imido-esters of coronene-tri-, -tetra- and -octacarboxylic acids are accessible by a twofold oxidative benzogenicDiels-Alderreaction. Alkyl acrylates add to perylene, and maleic alkyl imides react twice with perylene as well as with perylene-tetracarboxylic tetraesters. Coronenes substituted with a greatly variable number of electron-withdrawing substituents are thus accessible
A series of benzo[ghi]perylene (Bp) and coronene (Cor) derivatives substituted with electron‐withdrawing methoxycarbonyl (COOMe) or electron‐donating methoxyl (MeO) groups was synthesized. The electrochemical, spectroscopic, and photophysical properties of these compounds were investigated by cyclic voltammetry, steady‐state and time‐resolved spectroscopy, and quantum‐yield measurements. Introduction
Self-Assembly of Coronene Bisimides: Mechanistic Insight and Chiral Amplification
作者:Chidambar Kulkarni、Rajesh Munirathinam、Subi J. George
DOI:10.1002/chem.201301251
日期:2013.8.19
as its chiral counterpart. X‐ray diffraction studies of both molecules reveals a 2D hexagonal columnar arrangement. The coassembly of CBI‐GCH and CBI‐GACH shows chiralamplification (sergeant and soldiers experiment) with saturation at 30–50 % of the chiral derivative, which was further used to study the dynamics of the assembly. Thus, this study presents a rare report of chiralamplification in an
Novel Coronene-Naphthalene Dimide-Based Donor-Acceptor Pair for Tunable Charge-Transfer Nanostructures
作者:Mohit Kumar、Subi J. George
DOI:10.1002/asia.201402426
日期:2014.9
material for organic electronics and ferroelectrics. Two major factors which govern their functions are the strength of CT interaction and their supramolecular nanostructuring. Here we present coronene‐naphthalenediimide (NDI)‐based novel D‐A pairs that form alternately stacked CT assemblies. Through systematic substitution of the NDI derivatives and studying their CT interactions with coronene, a clear