Supramolecular Chirality from Hierarchical Self-Assembly of Atomically Precise Silver Nanoclusters Induced by Secondary Metal Coordination

ACS Nano ◽  
2021 ◽  
Author(s):  
Yuting Bi ◽  
Zhi Wang ◽  
Tong Liu ◽  
Di Sun ◽  
Nicolas Godbert ◽  
...  
Keyword(s):  
Self Assembly ◽  
Silver Nanoclusters ◽  
Metal Coordination ◽  
Supramolecular Chirality

Hierarchical self-assembly of an azobenzene dyad with inverted amide connection into toroidal and tubular nanostructures

2020 ◽  
Vol 18 (21) ◽  
pp. 3996-3999
Author(s):  
Takuho Saito ◽  
Shiki Yagai
Keyword(s):  
Thermal Stability ◽  
Self Assembly ◽  
Supramolecular Chirality ◽  
Thermal Stability Of

Inversion of the amide connectivity of an azobenzene dyad, which self-assembles into chiral toroids and nanotubes, improves the thermal stability of the assemblies, however it negatively affects supramolecular chirality.

scholarly journals Diverse protein assembly driven by metal and chelating amino acids with selectivity and tunability

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Minwoo Yang ◽  
Woon Ju Song
Keyword(s):  
Amino Acids ◽  
Self Assembly ◽  
Protein Structures ◽  
Functional Materials ◽  
Building Blocks ◽  
Unnatural Amino Acid ◽  
Metal Coordination ◽  
Specific Chemical ◽  
Natural Building ◽  
Kinetics Of

AbstractProteins are versatile natural building blocks with highly complex and multifunctional architectures, and self-assembled protein structures have been created by the introduction of covalent, noncovalent, or metal-coordination bonding. Here, we report the robust, selective, and reversible metal coordination properties of unnatural chelating amino acids as the sufficient and dominant driving force for diverse protein self-assembly. Bipyridine-alanine is genetically incorporated into a D3 homohexamer. Depending on the position of the unnatural amino acid, 1-directional, crystalline and noncrystalline 2-directional, combinatory, and hierarchical architectures are effectively created upon the addition of metal ions. The length and shape of the structures is tunable by altering conditions related to thermodynamics and kinetics of metal-coordination and subsequent reactions. The crystalline 1-directional and 2-directional biomaterials retain their native enzymatic activities with increased thermal stability, suggesting that introducing chelating ligands provides a specific chemical basis to synthesize diverse protein-based functional materials while retaining their native structures and functions.

Aggregation behavior of tetraphenylporphyrin in aqueous surfactant solutions: Chiral premicellar J-aggregate formation

2015 ◽  
Vol 19 (07) ◽  
pp. 845-851 ◽  
Author(s):  
Margaret A. Gradova ◽  
Vladimir V. Artemov ◽  
Anton V. Lobanov
Keyword(s):  
Anionic Surfactant ◽  
Self Assembly ◽  
Photophysical Properties ◽  
Direct Synthesis ◽  
Aggregate Formation ◽  
Experimental Conditions ◽  
Aggregation State ◽  
Supramolecular Chirality ◽  
Surfactant Solutions ◽  
Surfactant Interactions

Porphyrin-surfactant interactions in aqueous solutions are known to result in the selfassembly of various supramolecular structures, including pigment-surfactant complexes, J- and H-aggregates, and solubilized dye species. Detailed studies on the mechanisms of the intermolecular interactions governing the above self-assembly processes allow to predict the aggregation state and hence, the photophysical properties of the dye-surfactant assemblies in order to perform a direct synthesis of the desired porphyrin-based nanostructures at the appropriate experimental conditions. This paper describes a novel example of the surfactant-induced J-aggregate formation from the diprotonated hydrophobic tetraphenylporphyrin species in submicellar aqueous anionic surfactant solutions. The above assemblies are characterized by a rod-like morphology and possess supramolecular chirality according to the CD measurements.

scholarly journals Metal self-assembly mimosine peptides with enhanced antimicrobial activity: towards a new generation of multitasking chelating agents

2020 ◽  
Vol 49 (9) ◽  
pp. 2862-2879 ◽  
Author(s):  
Joanna Izabela Lachowicz ◽  
Gabriele Dalla Torre ◽  
Rosita Cappai ◽  
Enrico Randaccio ◽  
Valeria M. Nurchi ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Amino Acid ◽  
Self Assembly ◽  
Building Block ◽  
Chelating Agents ◽  
Metal Coordination ◽  
Protein Amino Acid ◽  
Coordination Ability ◽  
New Generation

Mimosine is a non-protein amino acid that can be used as a building block in peptides with metal coordination ability.

scholarly journals Tunable Supramolecular Chirogenesis in the Self-Assembling of Amphiphilic Porphyrin Triggered by Chiral Amines

2020 ◽  
Vol 21 (22) ◽  
pp. 8557
Author(s):  
Marco Savioli ◽  
Manuela Stefanelli ◽  
Gabriele Magna ◽  
Francesca Zurlo ◽  
Maria Federica Caso ◽  
...  
Keyword(s):  
Self Assembly ◽  
Hydrophobic Effect ◽  
The Self ◽  
Chiral Amines ◽  
Solvent Mixtures ◽  
Fractal Structures ◽  
Chiral Amine ◽  
Supramolecular Chirality ◽  
Self Assembling ◽  
Aqueous Solvent

Supramolecular chirality is one of the most important issues in different branches of science and technology, as stereoselective molecular recognition, catalysis, and sensors. In this paper, we report on the self-assembly of amphiphilic porphyrin derivatives possessing a chiral information on the periphery of the macrocycle (i.e., D- or L-proline moieties), in the presence of chiral amines as co-solute, such as chiral benzylamine derivatives. The aggregation process, steered by hydrophobic effect, has been studied in aqueous solvent mixtures by combined spectroscopic and topographic techniques. The results obtained pointed out a dramatic effect of these ligands on the morphology and on the supramolecular chirality of the final self-assembled structures. Scanning electron microscopy topography, as well as fluorescence microscopy studies revealed the formation of rod-like structures of micrometric size, different from the fractal structures formerly observed when the self-assembly process is carried out in the absence of chiral amine co-solutes. On the other hand, comparative experiments with an achiral porphyrin analogue strongly suggested that the presence of the prolinate moiety is mandatory for the achievement of the observed highly organized suprastructures. The results obtained would be of importance for unraveling the intimate mechanisms operating in the selection of the homochirality, and for the preparation of sensitive materials for the detection of chiral analytes, with tunable stereoselectivity and morphology.

Supramolecular polymers constructed by orthogonal self-assembly based on host–guest and metal–ligand interactions

2015 ◽  
Vol 44 (3) ◽  
pp. 815-832 ◽  
Author(s):  
Peifa Wei ◽  
Xuzhou Yan ◽  
Feihe Huang
Keyword(s):  
Self Assembly ◽  
Recent Progress ◽  
Metal Coordination ◽  
Supramolecular Polymers ◽  
Ligand Interactions ◽  
Metal Ligand

This review describes recent progress in the orthogonal construction of supramolecular polymers based on host–guest and metal coordination interactions.

Self-Assembly of a Mixed-Ligand Metal-Coordination Polymeric Network of Cadmium(II) Croconate with 4,4‘-Bipyridine

2003 ◽  
Vol 42 (25) ◽  
pp. 8294-8299 ◽  
Author(s):  
Chih-Chieh Wang ◽  
Cheng-Han Yang ◽  
Shih-Min Tseng ◽  
Gene-Hsiang Lee ◽  
Yung-Ping Chiang ◽  
...  
Keyword(s):  
Self Assembly ◽  
Mixed Ligand ◽  
Metal Coordination ◽  
Polymeric Network
Sign in / Sign up

Export Citation Format

Share Document