1111897-41-6Relevant academic research and scientific papers
Supramolecularly Engineered Amphiphilic Macromolecules: Molecular Interaction Overrules Packing Parameters
Pramanik, Prithankar,Ray, Debes,Aswal, Vinod K.,Ghosh, Suhrit
, p. 3516 - 3520 (2017/03/21)
We report molecular interaction-driven self-assembly of supramolecularly engineered amphiphilic macromolecules (SEAM) containing a single supramolecular structure-directing unit (SSDU) consisting of an H-bonding group connected to a naphthalene diimide chromophore. Two such SEAMs, P1-50 and P2-50, having the identical chemical structure and hydrophobic/hydrophilic balance, exhibit distinct self-assembled structures (polymersome and cylindrical micelle, respectively) due to a difference in the H-bonding group (hydrazide or amide, respectively) of the single SSDU. When mixed together, P1-50 and P2-50 adopted self-sorted assembly. For either series of polymers, variation in the hydrophobic/hydrophilic balance does not alter the morphology reconfirming that self-assembly is primarily driven by directional molecular interaction which is capable of overruling the existing norms in packing parameter-dependent morphology control in an immiscibility-driven block copolymer assembly.
Fluorescence and morphology modulation in a photochromic diarylethene self-assembly system
Cao, Xinhua,Zhou, Jing,Zou, Ying,Zhang, Mingming,Yu, Xudong,Zhang, Song,Yi, Tao,Huang, Chunhui
scheme or table, p. 5090 - 5097 (2012/03/09)
Switchable supramolecular self-assemblies on the basis of interaction between melamine group containing photochromic diarylethene unit (DTE) and naphthalimide derivate (1) were designed and fabricated. 1 can gelate several aprotic solvents with different morphologies. The gel turned into partial gel in ethyl acetate with the addition of DTE as a guest molecule. Both the absorption and fluorescence spectra of the assembly can be reversibly switched by alternating UV/visible light irradiation. Meanwhile, the morphology of the coassembly of 12·DTE changed to film from original pieces of gel 1 in ethyl acetate. When 12·DTE was irradiated by UV light, the film morphology was converted into aggregated flakes. Moreover, the surface wettability of the complex can also be switched by light irradiation. The photochromic diarylethene unit is able to modulate the fluorescence and morphology of the assembled system only by virtue of light irradiation. Therefore, these results provide further insights into fluorescence and morphology controlling, especially application in upscale smart responsive materials.
Control of H- and J-type π stacking by peripheral alkyl chains and self-sorting phenomena in perylene bisimide homo- and heteroaggregates
Ghosh, Suhrit,Li, Xue-Qing,Stepanenko, Vladimir,Wuerthner, Frank
experimental part, p. 11343 - 11357 (2009/10/25)
The synthesis, self-assembly, and gelation ability of a series of organogelators based on perylene bisimide (PBI) dyes containing amide groups at imide positions are reported. The synergetic effect of intermolecular hydrogen bonding among the amide functi
