Toward complex matter: Supramolecular chemistry and self-organization

Lehn, Jean‐Maríe

doi:10.1073/pnas.072065599

Cited by 1,254 publications

(789 citation statements)

References 68 publications

Supporting

Mentioning

767

Contrasting

Unclassified

Order By: Relevance

“…The first parameter, multiplicity, has recently been shown to play a central role in the formation of convergent and divergent two‐dimensional (2D) coordination networks on metal surfaces 2, 3, 4, 5, 6, 7, 8, 9, 10, 11. In the low‐multiplicity, convergent case, ditopic ligands of high symmetry form monolayer coordination networks with co‐sublimed metal atoms, such as cobalt, on low‐index metal surfaces 9.…”

mentioning

confidence: 99%

Divergent Coordination Chemistry: Parallel Synthesis of [2×2] Iron(II) Grid‐Complex Tauto‐Conformers

et al. 2016

View full text Add to dashboard Cite

The coordination of iron(II) ions by a homoditopic ligand L with two tridentate chelates leads to the tautomerism‐driven emergence of complexity, with isomeric tetramers and trimers as the coordination products. The structures of the two dominant [FeII 4 L 4]8+ complexes were determined by X‐ray diffraction, and the distinctness of the products was confirmed by ion‐mobility mass spectrometry. Moreover, these two isomers display contrasting magnetic properties (FeII spin crossover vs. a blocked FeII high‐spin state). These results demonstrate how the coordination of a metal ion to a ligand that can undergo tautomerization can increase, at a higher hierarchical level, complexity, here expressed by the formation of isomeric molecular assemblies with distinct physical properties. Such results are of importance for improving our understanding of the emergence of complexity in chemistry and biology.

show abstract

mentioning

confidence: 99%

Divergent Coordination Chemistry: Parallel Synthesis of [2×2] Iron(II) Grid‐Complex Tauto‐Conformers

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Self-organization of simple organic components into more complex structures is one of the most scientifically exciting and technologically promising fields of research today [1,2]. One dimensional structures such as fibers, two dimensional (2D) structures such as membranes, and three dimensional (3D) structures such as columnar phases may be created from simpler structural units.…”

mentioning

confidence: 99%

Twist Elasticity and Anchoring in a Lamellar Nematic Phase

et al. 2004

View full text Add to dashboard Cite

Electrooptic measurements were performed on a lamellar nematic phase in which the mesogenic moieties lie in lamellae that are separated by partially perfluorinated side groups. The twist elastic constant K 22 and the quadratic and quartic anchoring strength coefficients are reported. K 22 is found to be considerably smaller than that of typical three-dimensional nematics, a consequence of the greatly weakened interactions between the spatially separated lamellae.

show abstract

“…M olecular self-assembly provides a bottom-up approach to the preparation of nanostructures (1)(2)(3). DNA, in particular, shows great potential to be a superb molecular system (4).…”

mentioning

confidence: 99%

Conformational flexibility facilitates self-assembly of complex DNA nanostructures

Zhang¹,

He³

et al. 2008

Proc. Natl. Acad. Sci. U.S.A.

256

249

View full text Add to dashboard Cite

Molecular self-assembly is a promising approach to the preparation of nanostructures. DNA, in particular, shows great potential to be a superb molecular system. Synthetic DNA molecules have been programmed to assemble into a wide range of nanostructures. It is generally believed that rigidities of DNA nanomotifs (tiles) are essential for programmable self-assembly of well defined nanostructures. Recently, we have shown that adequate conformational flexibility could be exploited for assembling 3D objects, including tetrahedra, dodecahedra, and buckyballs, out of DNA three-point star motifs. In the current study, we have integrated tensegrity principle into this concept to assemble well defined, complex nanostructures in both 2D and 3D. A symmetric five-pointstar motif (tile) has been designed to assemble into icosahedra or large nanocages depending on the concentration and flexibility of the DNA tiles. In both cases, the DNA tiles exhibit significant flexibilities and undergo substantial conformational changes, either symmetrically bending out of the plane or asymmetrically bending in the plane. In contrast to the complicated natures of the assembled structures, the approach presented here is simple and only requires three different component DNA strands. These results demonstrate that conformational flexibility could be explored to generate complex DNA nanostructures. The basic concept might be further extended to other biomacromolecular systems, such as RNA and proteins.icosahedron ͉ three-dimensional ͉ polyhedron ͉ cryo-EM ͉ molecular cages M olecular self-assembly provides a bottom-up approach to the preparation of nanostructures (1-3). DNA, in particular, shows great potential to be a superb molecular system (4). In the last 20 years, DNA has been explored as building blocks for nanoconstructions, including preparation of periodic and aperiodic 2D nanopatterns (5-8) and 3D polyhedra (9-14). Most of the branched DNA structures are intrinsically flexible and are not suitable building blocks for construction of well defined geometric structures. How to overcome the conformational flexibility of branched DNA structures is a major challenge in structural DNA nanotechnology. In the last decade, a series of rigid structural motifs have been successfully engineered that lead to the rapid evolution of structural DNA nanotechnology (4). However, with more experience and knowledge, it is possible to controllably introduce the conformational flexibility to prepare complex DNA nanostructures (15). In our recent study of 3D self-assembly of DNA three-point-star tiles (16), we found that DNA tetrahedra could be readily assembled, and the tetrahedra are well behaved during sample characterizations. In contrast, DNA dodecahedra and buckyballs have significantly lower assembly yields and are prone to deformation. This phenomenon can be explained by the geometrical differences of these structures. Tetrahedra consist of triangular faces, but others do not. According to tensegrity principle, triangular faces will lead to rigid s...

show abstract

Toward complex matter: Supramolecular chemistry and self-organization

Cited by 1,254 publications

References 68 publications

Divergent Coordination Chemistry: Parallel Synthesis of [2×2] Iron(II) Grid‐Complex Tauto‐Conformers

Divergent Coordination Chemistry: Parallel Synthesis of [2×2] Iron(II) Grid‐Complex Tauto‐Conformers

Twist Elasticity and Anchoring in a Lamellar Nematic Phase

Conformational flexibility facilitates self-assembly of complex DNA nanostructures

Contact Info

Product

Resources

About