scholarly journals Supramolecular organic frameworks (SOFs): homogeneous regular 2D and 3D pores in water

2017 ◽  
Vol 4 (3) ◽  
pp. 426-436 ◽  
Author(s):  
Jia Tian ◽  
Hui Wang ◽  
Dan-Wei Zhang ◽  
Yi Liu ◽  
Zhan-Ting Li
Keyword(s):  
Solid State ◽  
Self Assembly ◽  
Organic Dyes ◽  
Three Dimensional ◽  
Building Blocks ◽  
Future Research ◽  
New Family ◽  
Molecular Building Blocks ◽  
Anionic Species ◽  
2D And 3D

Abstract Studies on periodic porosity and related properties and functions have been limited to insoluble solid-state materials. Self-assembly provides a straightforward and efficient strategy for the construction of soluble periodic porous supramolecular organic frameworks (SOFs) in water from rationally designed molecular building blocks. From rigid tri- and tetra-armed building blocks and cucurbitu[8]ril (CB[8]), a number of two-dimensional (2D) honeycomb, square and rhombic SOFs can be generated, which is driven by CB[8]-encapsulation-enhanced dimerization of two aromatic units on the periphery of the multi-armed molecules. By utilizing the same three-component host−guest motif as the driving force, three-dimensional (3D) diamondoid and cubic SOFs can be obtained from tetrahedral and [Ru(bipy)3]2+-derived octahedral monomers and CB[8]. All of the 2D and 3D periodic frameworks are soluble in water, and are able to maintain the periodicity as well as the pore sizes in the solid state. 3D SOFs are highly efficient homogeneous polycationic frameworks for reversible adsorption of anionic species including organic dyes, peptides, nucleic acids, drugs, dendrimers and Wells-Dawson-typed polyoxametallates (WD-POMs). WD-POM molecules adsorbed in the [Ru(bipy)3]2+-based SOF can catalyse the reduction of proton to H2 upon visible-light sensitization of [Ru(bipy)3]2+, which allows multiple electron transfer from [Ru(bipy)3]2+ to WD-POM. This review summarizes the design, formation and characterization of this new family of self-assembled frameworks, highlights their applications as homogeneous porous materials and finally outlines some future research directions.

Self-Assembly of Proteins into Three-Dimensional Structures Using Bio-Conjugation

2014 ◽  
Vol 1663 ◽  
Author(s):  
Garima Thakur ◽  
Kovur Prashanthi ◽  
Thomas Thundat
Keyword(s):  
Self Assembly ◽  
Three Dimensional ◽  
Gold Surface ◽  
Building Blocks ◽  
Growth Conditions ◽  
Base Layer ◽  
Chemical Structures ◽  
Molecular Building Blocks ◽  
Ring Structures ◽  
Self Assembled

ABSTRACTSelf–assembly of molecular building blocks provides an interesting route to produce well-defined chemical structures. Tailoring the functionalities on the building blocks and controlling the time of self-assembly could control the properties as well as the structure of the resultant patterns. Spontaneous self-assembly of biomolecules can generate bio-interfaces for myriad of potential applications. Here we report self-assembled patterning of human serum albumin (HSA) protein in to ring structures on a polyethylene glycol (PEG) modified gold surface. The structure of the self-assembled protein molecules and kinetics of structure formation entirely revolved around controlling the nucleation of the base layer. The formation of different sizes of ring patterns is attributed to growth conditions of the PEG islands for bio-conjugation. These assemblies might be beneficial in forming structurally ordered architectures of active proteins such as HSA or other globular proteins.

Zeolitic Host–Guest Interactions and Building Blocks for the Self-Assembly of Complex Materials

MRS Bulletin ◽  
2005 ◽  
Vol 30 (10) ◽  
pp. 713-720 ◽  
Author(s):  
Thomas Bein
Keyword(s):  
Self Assembly ◽  
Electrostatic Interactions ◽  
Spatial Organization ◽  
Organic Dyes ◽  
Three Dimensional ◽  
Internal Surface ◽  
Building Blocks ◽  
Three Dimensional Objects ◽  
Surface Areas ◽  
Catalyst Systems

AbstractOrdered nanoscale pore systems such as those represented by zeolites offer many opportunities for the design of complex functional systems via self-assembly.With their large internal surface areas and tunable, well-defined crystalline pore structures that allow molecular sieving and ion exchange, zeolites can be adapted for numerous applications. The nanoscale reactors present in zeolite pore systems have been explored as structural templates for the spatial organization of numerous guests. Examples from various fields are discussed, such as the stabilization of organic dyes for the construction of energy transfer and storage systems, the construction of host–guest hybrid catalyst systems, and the encapsulation of conducting or semiconducting nanoscale wires and clusters. More complex, hierarchical forms of nanostructured matter become accessible when zeolite crystals are used as building blocks for the selfassembly of thin films or three-dimensional objects. A combination of weaker and stronger interactions ranging from dispersive forces, hydrogen bonding, and electrostatic interactions to covalent bonding can be used to build functional hierarchical constructs. Several examples and novel applications of such systems will be discussed, including oriented channel systems, chemical sensors, and hierarchical pore systems for catalytic reactions.

scholarly journals Synthesis by self-assembly and structural characterization of a new co-crystal system {[Cu(NO3)2(H2O)2]L1(NO3)2} (L1 = 1,1′-dibenzyl-3,3′-butyl-diimidazolium-2,2′-diylidene) from copper nitrate and a carbene precursor

2008 ◽  
Vol 6 (4) ◽  
pp. 505-508 ◽  
Author(s):  
Jorge Doimeadios
Keyword(s):  
Solid State ◽  
Hydrogen Bonds ◽  
Structural Characterization ◽  
Self Assembly ◽  
Three Dimensional ◽  
Building Blocks ◽  
Copper Nitrate ◽  
Supramolecular Network ◽  
Crystal System

AbstractHerein, the first example of a co-crystal system formed by an imidazolium nitrate, a carbene precursor, and copper (II) nitrate, {[Cu(NO3)2(H2O)2]L1(NO3)2} (1) (L1 = 1,1′-dibenzyl-3,3′-butyl-diimidazolium-2,2′-diylidene) is reported. These two building blocks are connected in the solid state through hydrogen bonds to generate a three-dimensional supramolecular network.

Quantitative analysis of solid-state diversity in trifluoromethylated phenylhydrazones

2017 ◽  
Vol 73 (5) ◽  
pp. 781-793 ◽  
Author(s):  
Dhananjay Dey ◽  
Deepak Chopra
Keyword(s):  
Solid State ◽  
Crystal Packing ◽  
Three Dimensional ◽  
Closed Shell ◽  
Building Blocks ◽  
High Dispersion ◽  
Scanning Calorimetry ◽  
Dispersion Energy ◽  
Molecular Building Blocks ◽  
Electrostatic Contribution

The cooperative roles of various structural motifs associated with the presence of different intermolecular interactions in the formation of molecular crystals are investigated in a series of trifluoromethylated phenylhydrazones. Out of the six compounds analysed, two exhibit three-dimensional structural similarities with geometrically equivalent building blocks, while a third exists as two polymorphic forms crystallized from ethanol solutions at low temperature (277 K) and room temperature (298 K), respectively. The compounds were characterizedviasingle-crystal and powder X-ray diffraction techniques and differential scanning calorimetry. In the absence of any strong hydrogen bonding, the supramolecular constructs are primarily stabilizedviamolecular pairs with a high dispersion-energy contribution, due to the presence of molecular stacking along the molecular backbone along with C—H...π interactions in the solid state, in preference to an electrostatic contribution. The interaction energies for the most stabilizing molecular building blocks are in the range −29 to −43 kJ mol−1. In addition, weak N—H...F, C—H...F and N—H...C interactions and F...F, F...C, F...N and C...N contacts act as secondary motifs, providing additional stability to the crystal packing. The overall molecular arrangements are carefully analysed in terms of their nature and energetics, and the roles of different molecular pairs towards the crystal structure are delineated. A topological study using the quantum theory of atoms in molecules was used to characterize all the atomic interactions in the solid state. It established the presence of (3, −1) bond critical points and the closed-shell nature of all the interactions.

scholarly journals 1,2,4-Triphospholyl anions – versatile building blocks for the formation of 1D, 2D and 3D assemblies

2015 ◽  
Vol 44 (22) ◽  
pp. 10245-10252 ◽  
Author(s):  
Claudia Heindl ◽  
Eugenia V. Peresypkina ◽  
Alexander V. Virovets ◽  
Vladislav Yu. Komarov ◽  
Manfred Scheer
Keyword(s):  
Supramolecular Chemistry ◽  
Self Assembly ◽  
Three Dimensional ◽  
Building Blocks ◽  
2D And 3D

The potential of K[P3C2R2] (R =tBu, Mes) as building blocks in metallo-supramolecular chemistry was investigated and self-assembly processes with Cu(i) halides resulted in the formation of a large variety of unprecedented one-, two- and even three-dimensional aggregates.

scholarly journals Inverse Design of Nanoporous Crystalline Reticular Materials with Deep Generative Models

2020 ◽  
Author(s):  
Zhenpeng Yao ◽  
Benjamin Sanchez-Lengeling ◽  
N. Scott Bobbitt ◽  
Benjamin J. Bucior ◽  
Sai Govind Hari Kumar ◽  
...  
Keyword(s):  
Self Assembly ◽  
Metal Organic Framework ◽  
Internal Surface ◽  
Building Blocks ◽  
Structural Features ◽  
Generative Models ◽  
Combinatorial Design ◽  
Surface Areas ◽  
Molecular Building Blocks ◽  
Metal Organic

Reticular frameworks are crystalline porous materials that form <i>via</i> the self-assembly of molecular building blocks (<i>i.e.</i>, nodes and linkers) in different topologies. Many of them have high internal surface areas and other desirable properties for gas storage, separation, and other applications. The notable variety of the possible building blocks and the diverse ways they can be assembled endow reticular frameworks with a near-infinite combinatorial design space, making reticular chemistry both promising and challenging for prospective materials design. Here, we propose an automated nanoporous materials discovery platform powered by a supramolecular variational autoencoder (SmVAE) for the generative design of reticular materials with desired functions. We demonstrate the automated design process with a class of metal-organic framework (MOF) structures and the goal of separating CO<sub>2</sub> from natural gas or flue gas. Our model exhibits high fidelity in capturing structural features and reconstructing MOF structures. We show that the autoencoder has a promising optimization capability when jointly trained with multiple top adsorbent candidates identified for superior gas separation. MOFs discovered here are strongly competitive against some of the best-performing MOFs/zeolites ever reported. This platform lays the groundwork for the design of reticular frameworks for desired applications.

scholarly journals Inverse Design of Nanoporous Crystalline Reticular Materials with Deep Generative Models

2020 ◽  
Author(s):  
Zhenpeng Yao ◽  
Benjamin Sanchez-Lengeling ◽  
N. Scott Bobbitt ◽  
Benjamin J. Bucior ◽  
Sai Govind Hari Kumar ◽  
...  
Keyword(s):  
Self Assembly ◽  
Metal Organic Framework ◽  
Internal Surface ◽  
Building Blocks ◽  
Structural Features ◽  
Generative Models ◽  
Combinatorial Design ◽  
Surface Areas ◽  
Molecular Building Blocks ◽  
Metal Organic

Reticular frameworks are crystalline porous materials that form <i>via</i> the self-assembly of molecular building blocks (<i>i.e.</i>, nodes and linkers) in different topologies. Many of them have high internal surface areas and other desirable properties for gas storage, separation, and other applications. The notable variety of the possible building blocks and the diverse ways they can be assembled endow reticular frameworks with a near-infinite combinatorial design space, making reticular chemistry both promising and challenging for prospective materials design. Here, we propose an automated nanoporous materials discovery platform powered by a supramolecular variational autoencoder (SmVAE) for the generative design of reticular materials with desired functions. We demonstrate the automated design process with a class of metal-organic framework (MOF) structures and the goal of separating CO<sub>2</sub> from natural gas or flue gas. Our model exhibits high fidelity in capturing structural features and reconstructing MOF structures. We show that the autoencoder has a promising optimization capability when jointly trained with multiple top adsorbent candidates identified for superior gas separation. MOFs discovered here are strongly competitive against some of the best-performing MOFs/zeolites ever reported. This platform lays the groundwork for the design of reticular frameworks for desired applications.

scholarly journals The Assembly of Porphyrin Systems in Well-Defined Nanostructures: An Update

Molecules ◽  
2019 ◽  
Vol 24 (23) ◽  
pp. 4307 ◽  
Author(s):  
Gabriele Magna ◽  
Donato Monti ◽  
Corrado Di Natale ◽  
Roberto Paolesse ◽  
Manuela Stefanelli
Keyword(s):  
Self Assembly ◽  
Energy Transport ◽  
Functional Materials ◽  
Building Blocks ◽  
Spatial Arrangement ◽  
Transport Processes ◽  
Internal Electric Field ◽  
Porphyrin Derivatives ◽  
Molecular Building Blocks ◽  
The Individual

The interest in assembling porphyrin derivatives is widespread and is accounted by the impressive impact of these suprastructures of controlled size and shapes in many applications from nanomedicine and sensors to photocatalysis and optoelectronics. The massive use of porphyrin dyes as molecular building blocks of functional materials at different length scales relies on the interdependent pair properties, consisting of their chemical stability/synthetic versatility and their quite unique physicochemical properties. Remarkably, the driven spatial arrangement of these platforms in well-defined suprastructures can synergically amplify the already excellent properties of the individual monomers, improving conjugation and enlarging the intensity of the absorption range of visible light, or forming an internal electric field exploitable in light-harvesting and charge-and energy-transport processes. The countless potentialities offered by these systems means that self-assembly concepts and tools are constantly explored, as confirmed by the significant number of published articles related to porphyrin assemblies in the 2015–2019 period, which is the focus of this review.

Halogen-bonding in a new family of tris(haloanilato)metallate(iii) magnetic molecular building blocks

2014 ◽  
Vol 43 (19) ◽  
pp. 7006-7019 ◽  
Author(s):  
Matteo Atzori ◽  
Flavia Artizzu ◽  
Elisa Sessini ◽  
Luciano Marchiò ◽  
Danilo Loche ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Dft Calculations ◽  
Crystal Structures ◽  
General Formula ◽  
Halogen Bonding ◽  
Building Blocks ◽  
New Family ◽  
Molecular Building Blocks

Here we report on new tris(haloanilato)metallate(iii) complexes with general formula [M(X2An)3]3−, their crystal structures, DFT calculations and magnetic properties.

Sign in / Sign up

Export Citation Format

Share Document