Induction of Liquid Crystallinity by Self‐Assembled Molecular Boxes

Piermattei, Alessio; Giesbers, Marcel; Marcelis, Antonius T. M.; Mendes, Eduardo; Picken, Stephen J.; Crego‐Calama, Mercedes; Reinhoudt, David N.

doi:10.1002/anie.200602870

Cited by 25 publications

(11 citation statements)

References 35 publications

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“…[1][2][3] Scientists have been inspired to employ as elf-assembly approach as a" bottom-up"t ool to create intriguing structures for different applications. [4,5] The fabrication of precisely discrete one-dimensional( 1D) nanoarchitectures is considered one of the most significant issues in the frontiera rea of nanosciencea nd nanotechnology. [6] With exceptional mechanical, optical,e lectronic, thermochemical, and biochemical properties in addition to versatile geometric features, these architecturesa re encouraging building blocks for superior electrochemical energy devices, catalysts, and nanooptoelectronics.…”

Section: Introductionmentioning

confidence: 99%

Tunable Morphology of Spiropyran Assemblies: From Nanospheres to Nanorods

Pan

Lü

et al. 2016

Chemistry An Asian Journal

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Spiropyran (SP), which can respond to acid, ultraviolet irradiation, and mechanical force, has received great attention as a classic molecule for the construction of stimuli-responsive materials. However, the self-assembly behavior of SP with a tunable morphology has rarely been investigated. In the present work, a SP derivative bearing two carboxyl groups and one hydroxyl group was prepared and used as a model to investigate the optical properties, molecular self-assembly, and morphology of SP. This pH-responsive derivative could undergo a large morphology variation from a sphere- to a rodlike structure by adjusting the acidity. The indoline and pyridopyran fragments contributed to π-π stacking, whereas the carboxyl groups contributed to hydrogen bonding. Both π-π stacking and hydrogen bonding contributed to the pH-responsive self-assembly. The morphologies of spiropyran aggregates formed under different conditions were characterized by SEM, TEM, and FTIR spectroscopy. Control of the morphology of the spiropyran nanostructure was achieved.

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Section: Introductionmentioning

confidence: 99%

Tunable Morphology of Spiropyran Assemblies: From Nanospheres to Nanorods

Pan

Lü

et al. 2016

Chemistry An Asian Journal

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“…Coordination chemistry-based approaches for constructing supramolecular structures are well-established, with three general substrategies emerging: the directional bonding, 1 symmetry interaction, 2 and weak-link approaches. 3 While the former two approaches result in rigid structures with well-defined cavities, the weak-link approach (WLA) is unique as it yields flexible species where the distances between the chemically active functionalities can be modulated via reversible chemistry on metal centers coordinated to hemilabile ligands ( 1–6 , Scheme 1).…”

Section: Introductionmentioning

confidence: 99%

Chelating Effect as a Driving Force for the Selective Formation of Heteroligated Pt(II) Complexes with Bidentate Phosphino-Chalcoether Ligands

et al. 2010

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The halide-induced ligand rearrangement reaction (HILR) has been employed to provide selective and exclusive in situ formation of heteroligated Rh(I), Pd(II), and Pt(II) complexes with bidentate phosphino-chalcoether ligands. To gain insights on the nature of this unique reaction, we explored this process via the stepwise addition of bidentate phosphino-chalcoether (P, X; X = S or Se) and relevant monodentate phosphine ligands with a Pt(II) metal precursor. The corresponding monoligated complexes were obtained in quantitative yields by reacting 1 equiv of a P, X bidentate ligand with Pt(II) and were fully characterized via single crystal X-ray diffraction studies and heteronuclear (31P, 77Se, and 195Pt) NMR spectroscopy in solution. These species were further reacted with a second equivalent of either a bidentate ligand or the monodentate ethyl diphenylphosphine ligand, resulting in the clean formation of the heteroligated species or, in the case of the monodentate ligand with an electron-withdrawing bidentate ligand, a mixture of products. On the basis of competitive exchange reactions between these heteroligated, homoligated, and monoligated complexes, we conclude that ligand chelation plays a crucial role in the Pt(II) HILR. The in situ preferable formation of the stable monoligated complex allows for ligand sorting to occur in these systems. In all cases where the heteroligated product results, the driving force to these species is ligand chelation.

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“…33,34 It was observed that calix [4]arene 7 and B or C self-assemble spontaneously upon mixing in apolar solvent to give the mesogenic trimeric capsules 7 3 ·B 6 or 7 3 ·C 6 which are thermodynamically stable. The trimeric capsule 7 3 · B 6 shows lower thermal stability than 7 3 · C 6 , since melamine forms weaker hydrogen bonds with barbiturates than with cyanurates.…”

Section: Methodsmentioning

confidence: 99%