Water tuned the helical nanostructures and supramolecular chirality in organogels

Liu, Changxia; Jin, Qiong‐Hua; Lv, Ke; Zhang, Li; Liu, Minghua

doi:10.1039/c4cc00311j

Cited by 101 publications

(79 citation statements)

References 29 publications

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“…117 This method can be used to construct various chiral or helical 1D nanostructures of ionic PDI amphiphiles. Nevertheless, precise control of helical selfassembly of PDIs remains very challenging, both in solution and on surfaces, as well as at interfaces.…”

Section: Self-assembly and Chiral/helical Nanostructuresmentioning

confidence: 99%

Self-Assembly of Perylene Imide Molecules into 1D Nanostructures: Methods, Morphologies, and Applications

Slattum²,

et al. 2015

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Section: Self-assembly and Chiral/helical Nanostructuresmentioning

confidence: 99%

Self-Assembly of Perylene Imide Molecules into 1D Nanostructures: Methods, Morphologies, and Applications

Slattum²,

et al. 2015

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“…Also Prasad and coworkers have reported the formation of giant vesicles, sheets and columnar phases of a naphthalene containing dendron depending of the solvent . More recently, benzoyl hydrazide organogels have also shown a strong impact of the solvent on the morphology of the organogel and water content has been shown to tune the helicity of organogels from a cationic amphiphile .…”

Section: Introductionmentioning

confidence: 98%

Solvent-tunable morphology and emission of pyrene-dipeptide organogels

2015

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Two pyrene based organogelators in which the pyrene moiety has been linked to the diphenylalanine dipeptide have been synthesized. We show how the solvent can tune both the morphology and the optical properties of the organogels: spherical aggregates with quenched emission were obtained in acetonitrile, whereas an entangled fibrillar network with enhanced emission was formed in o-dichlorobenzene. Fourier transform infrared spectroscopy, circular dichroism and nuclear magnetic resonance spectroscopy experiments suggest that both π-π stacking and hydrogen bonding contribute to the formation of the supramolecular networks. Ultraviolet-visible and steady state emission studies demonstrated the formation of I-aggregates in acetonitrile. In contrast, in o-dichlorobenzene, the formation of J-type aggregates leads to assemblies with enhanced emission. These results give some insight into the important role of the gelling solvent in the morphology of the supramolecular gels and may help in the design of new soft-materials.

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“…Complexes 2 – 4 showed weak positive signals at around 300 nm in chloroform at room temperature. According to previous reports in the literature, the absorption band at about 300 nm was tentatively assigned to result from the change from the molecular chirality of l ‐glutamic‐acid derived alkynylplatinum(II) complex to supramolecular chirality. The CD signals were distinctly enhanced and an additional signal at about 420 nm appeared in the spectrum of complex 4 upon the addition of n ‐hexane which would enhance aggregation and is in line with the results obtained from the UV/Vis absorption and emission experiments.…”

Section: Resultsmentioning

confidence: 80%

Aggregation and Tunable Color Emission Behaviors of l‐Glutamine‐Derived Platinum(II) Bipyridine Complexes by Hydrogen‐Bonding, π–π Stacking and Metal–Metal Interactions

et al. 2019

Chemistry A European J

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An l‐glutamine‐derived functional group was introduced to the bis(arylalkynyl)platinum(II) bipyridine complexes 1–4. The emission could be switched between the 3MLCT excited state and the triplet excimeric state through solvent or temperature changes, which is attributed to the formation and disruption of hydrogen‐bonding, π–π stacking, and metal–metal interactions. Different architectures with various morphologies, such as honeycomb nanostructures and nanospheres, were formed upon solvent variations, and these changes were accompanied by 1H NMR and distinct emission changes. Additionally, yellow and red emissive metallogels were formed at room temperature due to the different aggregation behaviors introduced by the substituent groups on bipyridine. The thermoresponsive metallogel showed emission behavior with tunable colors by controlling the temperature. The negative Gibbs free‐energy change (ΔG) and the large association constant for excimer formation have suggested that the molecules undergo aggregation through hydrogen‐bonding, π–π, and metal–metal interactions, resulting in triplet excimeric emission.

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Water tuned the helical nanostructures and supramolecular chirality in organogels

Cited by 101 publications

References 29 publications

Self-Assembly of Perylene Imide Molecules into 1D Nanostructures: Methods, Morphologies, and Applications

Self-Assembly of Perylene Imide Molecules into 1D Nanostructures: Methods, Morphologies, and Applications

Solvent-tunable morphology and emission of pyrene-dipeptide organogels

Aggregation and Tunable Color Emission Behaviors of l‐Glutamine‐Derived Platinum(II) Bipyridine Complexes by Hydrogen‐Bonding, π–π Stacking and Metal–Metal Interactions

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