Self-Assembly of Supramolecular Architectures Using Chlorotetra(Pyrrole-2-Carboxylato)Diruthenium Molecules as Building Blocks

2007 ◽  
Vol 19 (1) ◽  
pp. 219-230 ◽  
Author(s):  
María del Carmen Barral ◽  
Rodrigo González-Prieto ◽  
Santiago Herrero ◽  
Reyes Jiménez-Aparicio ◽  
José Luis Priego ◽  
...  
Keyword(s):  
Self Assembly ◽  
Building Blocks ◽  
Supramolecular Architectures

scholarly journals Towards Building Blocks for Supramolecular Architectures Based on Azacryptates

Molecules ◽  
2020 ◽  
Vol 25 (7) ◽  
pp. 1733 ◽  
Author(s):  
Ana Miljkovic ◽  
Sonia La Cognata ◽  
Greta Bergamaschi ◽  
Mauro Freccero ◽  
Antonio Poggi ◽  
...  
Keyword(s):  
Conformational Changes ◽  
Self Assembly ◽  
Hydrophobic Interactions ◽  
Building Blocks ◽  
Water Mixture ◽  
Molecular Systems ◽  
Supramolecular Architectures ◽  
Starting Point ◽  
The Difference ◽  
Supramolecular Devices

In this work, we report the synthesis of a new bis(tris(2-aminoethyl)amine) azacryptand L with triphenyl spacers. The binding properties of its dicopper complex for aromatic dicarboxylate anions (as TBA salts) were investigated, with the aim to obtain potential building blocks for supramolecular structures like rotaxanes and pseudo-rotaxanes. As expected, UV-Vis and emission studies of [Cu2L]4+ in water/acetonitrile mixture (pH = 7) showed a high affinity for biphenyl-4,4′-dicarboxylate (dfc2−), with a binding constant of 5.46 log units, due to the best match of the anion bite with the Cu(II)-Cu(II) distance in the cage’s cavity. Compared to other similar bistren cages, the difference of the affinity of [Cu2L]4+ for the tested anions was not so pronounced: conformational changes of L seem to promote a good interaction with both long (e.g., dfc2−) and short anions (e.g., terephthalate). The good affinity of [Cu2L]4+ for these dicarboxylates, together with hydrophobic interactions within the cage’s cavity, may promote the self-assembly of a stable 1:1 complex in water mixture. These results represent a good starting point for the application of these molecular systems as building units for the design of new supramolecular architectures based on non-covalent interactions, which could be of interest in all fields related to supramolecular devices.

Self-Assembly of Cyclic Dipeptides: Platforms for Functional Materials

2020 ◽  
Vol 27 (8) ◽  
pp. 688-697
Author(s):  
Yu Chen ◽  
Kai Tao ◽  
Wei Ji ◽  
Pandeeswar Makam ◽  
Sigal Rencus-Lazar ◽  
...  
Keyword(s):  
Self Assembly ◽  
Functional Materials ◽  
Building Blocks ◽  
Cyclic Dipeptide ◽  
Design Synthesis ◽  
Cyclic Dipeptides ◽  
The Past ◽  
Supramolecular Architectures ◽  
Structural Rigidity

Supramolecular self-assembled functional materials comprised of cyclic dipeptide building blocks have excellent prospects for biotechnology applications due to their exceptional structural rigidity, morphological flexibility, ease of preparation and modification. Although the pharmacological uses of many natural cyclic dipeptides have been studied in detail, relatively little is reported on the engineering of these supramolecular architectures for the fabrication of functional materials. In this review, we discuss the progress in the design, synthesis, and characterization of cyclic dipeptide supramolecular nanomaterials over the past few decades, highlighting applications in biotechnology and optoelectronics engineering.

scholarly journals Polymorphic self-assembly of pyrazine-based tectons at the solution–solid interface

2019 ◽  
Vol 10 ◽  
pp. 494-499
Author(s):  
Achintya Jana ◽  
Puneet Mishra ◽  
Neeladri Das
Keyword(s):  
Hydrogen Bonding ◽  
Self Assembly ◽  
Building Blocks ◽  
Molecular Structures ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Equal Distribution ◽  
Solid Interface ◽  
Supramolecular Architectures ◽  
Microscopy Investigation

Exploring the surface self-assembly of small molecules that act as building blocks (tectons) for complex supramolecular structures is crucial for realizing surface-supported functional molecular devices. Here, we report on the synthesis and surface self-assembly of a new pyrazine-derived molecule with pyridine pendants. Ambient scanning tunneling microscopy investigation at the solution–solid interface reveals polymorphic self-assembly of these molecules on a HOPG substrate. Two different molecular packing structures with equal distribution are observed. Detailed analysis of the STM images emphasizes the crucial role of weak intermolecular hydrogen bonding, and molecule–substrate interactions in the formation of the observed polymorphs. Such weak hydrogen bonding interactions are highly desirable for the formation of modular supramolecular architectures since they can provide sufficiently robust molecular structures and also facilitate error correction.

Supramolecular assembly of functional peptide–polymer conjugates

2019 ◽  
Vol 17 (28) ◽  
pp. 6719-6734 ◽  
Author(s):  
Ronja Otter ◽  
Pol Besenius
Keyword(s):  
Self Assembly ◽  
Synthetic Peptide ◽  
Supramolecular Assembly ◽  
Building Blocks ◽  
Polymer Chains ◽  
Supramolecular Polymer ◽  
Polymer Conjugates ◽  
Supramolecular Architectures ◽  
Functional Peptide ◽  
3D Networks

The following review gives an overview about synthetic peptide–polymer conjugates as macromolecular building blocks and their self-assembly into a variety of supramolecular architectures, from supramolecular polymer chains, to anisotropic 1D arrays, 2D layers, and more complex 3D networks.

Self-assembly and properties of low-dimensional nanomaterials based on π-conjugated organic molecules

2008 ◽  
Vol 80 (3) ◽  
pp. 639-658 ◽  
Author(s):  
Jing Lv ◽  
Huibiao Liu ◽  
Yuliang Li
Keyword(s):  
Physical Properties ◽  
Self Assembly ◽  
Materials Science ◽  
Hydrophobic Interactions ◽  
Building Blocks ◽  
Supramolecular Systems ◽  
Nanoscale Structures ◽  
Design And Synthesis ◽  
Supramolecular Architectures ◽  
Low Dimensional

Building supramolecular architectures with well-defined shapes and functions is of great importance in materials science, nanochemistry, and biomimetic chemistry. In recent years, we have devoted much effort to the construction of well-defined supramolecular structures through noncovalent forces such as hydrogen bonding, π-stacking, metal-ligand bonds, and hydrophilic and hydrophobic interactions, with the aid of functional building blocks. The morphologies and their physical properties were studied, and new methods for the construction of one-dimensional nanoscale structures have been developed. In this review, we summarize our recent studies on the design and synthesis of the supramolecular systems, as well as the physical properties of nanoscale structures.

Fast, efficient syntheses of linear poly(dipyrromethene)s

2002 ◽  
Vol 80 (12) ◽  
pp. 1668-1675 ◽  
Author(s):  
Qingqi Chen ◽  
David Dolphin
Keyword(s):  
Self Assembly ◽  
Building Blocks ◽  
Starting Material ◽  
Supramolecular Architectures ◽  
Linear Poly

The synthesis of three octapyrrolic, 8–10, and four dodecapyrrolic, 15–18, oligomers is reported. They are linear poly(dipyrromethene)s and potential ligands as building blocks for supramolecular architectures through self-assembly. Octapyrrolic oligomers 8–10 were prepared in 90–95% yields by condensation of 2 equiv of a tripyrrolic compound 4 with 1 equiv of diformyldipyrrolic compounds 5–7. A similar procedure, involving the condensation of 2 equiv of a pentapyrrolic starting material 13 with 1 equiv of 5–7 or 14, was found to give rise to the corresponding dodecameric systems 15–18 in 41–56% yields.Key words: poly(dipyrromethene), linear polypyrroles, dipyrromethane, dipyrromethene.

Bay-substituted perylene bisimides: Twisted fluorophores for supramolecular chemistry

2006 ◽  
Vol 78 (12) ◽  
pp. 2341-2349 ◽  
Author(s):  
Frank Würthner
Keyword(s):  
Self Assembly ◽  
Metal Ion ◽  
Building Blocks ◽  
Quantum Yields ◽  
Inversion Barrier ◽  
High Solubility ◽  
Bay Area ◽  
Supramolecular Architectures ◽  
Broad Variety ◽  
Perylene Bisimides

Perylene bisimides bearing four aryloxy substituents in the 1,6,7,12 positions (so-called bay area) and two receptor units at the imide nitrogens are most useful fluorescent building blocks for the realization of a broad variety of supramolecular architectures. As discussed in this review, this versatility is not only due to the outstanding fluorescence properties of these dyes with quantum yields close to unity, but also a consequence of pronounced twisting of the π-system with an inversion barrier of around 60 kJ/mol (leading to atropisomerism) and conformational flexibility of aryloxy units. The latter two properties endow these dyes with high solubility even in least polar aliphatic solvents and enable the dyes to maintain a distance of >4 Å in their supramolecular assemblies. This feature particularly reduces the, otherwise often observed, fluorescence quenching in dye aggregates. Thus, bright luminescent cyclic and polymeric supramolecular architectures have become available from these dyes by hydrogen-bond and metal-ion directed self-assembly. In those cases where additional π-π-stacking interactions come into play, luminescent organogels and liquid crystals are obtained.

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