Abstract
Chiral supramolecular structures are attracting great attention due to their specific properties and high potential in chiral sensing and separation. Herein, supramolecular assembling behaviors of chiral perylene diimides have been systematically investigated in a mixed solution of tetrahydrofuran and water. They exhibit remarkably different morphologies and chiral aggregation behaviors depending on the mixing ratio of the solvents, i.e., the fraction of water. The morphogenesis and optoelectronic properties of chiral supramolecular structures have been thoroughly studied using a range of experimental and theoretical methods to investigate the morphological effects of chiral supramolecular assemblies on the electrical performances and photogenerated charge-carrier behaviors. In addition, chiral perylene diimides have been discriminated by combining vibrational circular dichroism with theoretical calculations, for the first time. The chiral supramolecular nanostructures developed herein strongly absorb visible spectral region and exhibit high photoresponsivity and detectivity, opening up new opportunities for practical applications in optoelectronics.
Highlights
We recently observed the amplified chirality of chiral perylene diimides bearing 1-phenylethylamine (CPDI-Ph) nanowires fabricated by a non-solvent mediated nucleation method, compared with the molecular chirality, and utilized this unique feature for high-performance chiroptical sensing[24]
circular dichroism (CD) spectroscopy, which measures the differential absorption of LCP and RCP light, provides structural information for the ground electronic state of a system[25]
The main peaks from Vibrational circular dichoism (VCD) calculations were in good agreement with the experimental results, leading to the facile identification of the AC
Summary
We recently observed the amplified chirality of chiral perylene diimides bearing 1-phenylethylamine (CPDI-Ph) nanowires fabricated by a non-solvent mediated nucleation method, compared with the molecular chirality, and utilized this unique feature for high-performance chiroptical sensing[24]. We have systematically investigated the morphogenesis of chiral supramolecular self-assemblies of CPDI-Ph in different www.nature.com/scientificreports/. Aggregation states using a binary solvent system of tetrahydrofuran (THF) and water. Their dynamic aggregation processes have been analyzed by time-dependent in-situ UV-visible (UV-vis) spectroscopy, circular dichroism (CD) spectroscopy, and scanning electron microscopy (SEM). We have utilized VCD to effectively discriminate the chiral PDI derivatives
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