Recent aspects of self-oscillating polymeric materials: designing self-oscillating polymers coupled with supramolecular chemistry and ionic liquid science

2014 ◽  
Vol 16 (22) ◽  
pp. 10388-10397 ◽  
Author(s):  
Takeshi Ueki ◽  
Ryo Yoshida
Keyword(s):  
Ionic Liquid ◽  
Supramolecular Chemistry ◽  
Polymeric Materials ◽  
Building Blocks ◽  
Covalent Bonds ◽  
Spatiotemporal Structure ◽  
Molecular Building Blocks ◽  
Recent Developments

Herein, we summarise the recent developments in self-oscillating polymeric materials based on the concepts of supramolecular chemistry, where aggregates of molecular building blocks with non-covalent bonds evolve the temporal or spatiotemporal structure.

scholarly journals Self-standing and flexible covalent organic framework (COF) membranes for molecular separation

2020 ◽  
Vol 6 (41) ◽  
pp. eabb1110
Author(s):  
Jiangtao Liu ◽  
Gang Han ◽  
Dieling Zhao ◽  
Kangjia Lu ◽  
Jie Gao ◽  
...  
Keyword(s):  
Building Blocks ◽  
Shape Selectivity ◽  
Honeycomb Lattice ◽  
Free Standing ◽  
Covalent Bonds ◽  
Separation Science ◽  
Covalent Organic Framework ◽  
Molecular Building Blocks ◽  
Almost All ◽  
Organic Framework

Almost all covalent organic framework (COF) materials conventionally fabricated by solvothermal method at high temperatures and pressures are insoluble and unprocessable powders, which severely hinder their widespread applications. This work develops an effective and facile strategy to construct flexible and free-standing pure COF membranes via the liquid-liquid interface-confined reaction at room temperature and atmospheric pressure. The aperture size and channel chemistry of COF membranes can be rationally designed by bridging various molecular building blocks via strong covalent bonds. Benefiting from the highly-ordered honeycomb lattice, high solvent permeances are successfully obtained and follow the trend of acetonitrile > acetone > methanol > ethanol > isopropanol. Interestingly, the imine-linked COF membrane shows higher nonpolar solvent permeances than b-ketoenamine-linked COF due to their difference in pore polarity. Both kinds of COF membranes exhibit high solvent permeances, precise molecular sieving, excellent shape selectivity, and sufficient flexibility for membrane-based separation science and technology.

Case history of porphyrin J-aggregates: a personal point of view

2009 ◽  
Vol 13 (04n05) ◽  
pp. 461-470 ◽  
Author(s):  
Joaquim Crusats ◽  
Zoubir El-Hachemi ◽  
Carlos Escudero ◽  
Josep M. Ribó
Keyword(s):  
Supramolecular Chemistry ◽  
Self Assembly ◽  
Building Blocks ◽  
Point Of View ◽  
Water Soluble ◽  
The Self ◽  
Molecular Building Blocks ◽  
History Of ◽  
J Aggregates ◽  
The University

The formation and structure of the title aggregates are paradigms of the self-assembly of amphiphilic molecular building blocks in supramolecular chemistry. This review summarizes the research in the University of Barcelona on the homoassociation of the water soluble meso 4-sulfonatophenyl-and phenyl substituted porphyrins.

scholarly journals Cycloparaphenylene-Norbornene Monomers Afford Access to Carbon Nanohoop-Based Polymers

2019 ◽  
Author(s):  
Ruth Maust ◽  
Penghao Li ◽  
Lev N. Zakharov ◽  
Ramesh Jasti
Keyword(s):  
Small Molecule ◽  
Ring Opening ◽  
Polymeric Materials ◽  
Building Blocks ◽  
Functional Polymers ◽  
Size Dependent ◽  
Molecular Building Blocks ◽  
Polymer Architectures ◽  
Different Diameters ◽  
Critical Challenge

Although impressive strides have been made toward achieving precise polymer architectures, the pursuit of monomers with diverse structures and functions remains a critical challenge for polymer design. Herein we disclose the first polymers constructed from cycloparaphenylenes (CPPs), a family of strained, pi-rich macrocycles. Poly-CPPs were prepared via ring-opening metathesis polymerization (ROMP) of benzonorbornene-embedded CPPs. The distinctive size-dependent properties of CPPs, including fluorescence and host-guest chemistry, are preserved in poly-CPPs, offering a means to capitalize on these properties in polymeric materials. Moreover, copolymerizing CPPs of two different diameters results in polymers with emergent photophysical and supramolecular properties not achievable with small molecule CPP units. This work sets the stage for CPP derivatives to serve as molecular building blocks for the next generation of functional polymers.

Cocrystallization of pyrogallol[4]arenes with target molecules

2011 ◽  
Author(s):  
◽  
Drew A. Fowler
Keyword(s):  
Supramolecular Chemistry ◽  
Double Helix ◽  
Active Pharmaceutical Ingredient ◽  
Building Blocks ◽  
New Host ◽  
Fluorescent Reporter ◽  
University Of Missouri ◽  
Molecular Building Blocks ◽  
Target Molecules ◽  
Humphry Davy

[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Supramolecular chemistry, in its simplest and broadest description, is the chemistry of intermolecular interactions or chemistry of the noncovalent bond. Supramolecular chemistry is rooted in discoveries, such as the chlorine clathrate found in 1810 by Sir Humphry Davy, and concepts, such as coordination chemistry (1893-Werner) and the lock-and-key concept (1894-Fischer). The broad definition of supramolecular chemistry can be applied to a vast subject range including naturally occurring assemblies, such as proteins and the double helix of DNA. Today, a key interest of supramolecular chemists is the design of functional multi-component systems constructed from smaller molecular building blocks. This research focuses specifically on the supramolecular chemistry of a family of macrocycles called calixarenes, specifically the pyrogallol derivatives pyrogallol[4]arenes. Due to the bowl-like shape of the macrocycles and the presence of 12 upper-rim hydroxyls, pyrogallol[4]arenes have been found to exhibit a number of interesting supramolecular properties. The following dissertation contains the description of advances that have been made using these macrocycles. This work illustrates the expansion of a project dealing with the cocrystallization, and encapsulation of fluorescent reporter molecules with a variety of pyrogallol[4]arenes in different solvent systems. The description of a number of crystal structures that is offered will illustrate how, through thoughtful experimentation, the successful design of a new host molecular capsule was carried out and broadened to include a number of guest molecules. The target molecules have also been expanded from the fluorescent reporters to a variety of possible targets molecules. The solid-state structures discussed include multiple cocrystals of gabapentin, an active pharmaceutical ingredient, and structures containing the organometallic sandwich complex ferrocene.

scholarly journals Supramolecular Chemistry and Self-Organization: A Veritable Playground for Catalysis

Catalysts ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 163 ◽  
Author(s):  
Loïc Leclercq ◽  
Grégory Douyère ◽  
Véronique Nardello-Rataj
Keyword(s):  
Supramolecular Chemistry ◽  
Intermolecular Interactions ◽  
Noncovalent Interactions ◽  
Directed Assembly ◽  
Building Blocks ◽  
Reaction Rates ◽  
Supramolecular Assemblies ◽  
Self Organization ◽  
Catalytic Systems ◽  
Molecular Building Blocks

The directed assembly of molecular building blocks into discrete supermolecules or extended supramolecular networks through noncovalent intermolecular interactions is an ongoing challenge in chemistry. This challenge may be overcome by establishing a hierarchy of intermolecular interactions that, in turn, may facilitate the edification of supramolecular assemblies. As noncovalent interactions can be used to accelerate the reaction rates and/or to increase their selectivity, the development of efficient and practical catalytic systems, using supramolecular chemistry, has been achieved during the last few decades. However, between discrete and extended supramolecular assemblies, the newly developed “colloidal tectonics” concept allows us to link the molecular and macroscopic scales through the structured engineering of colloidal structures that can be applied to the design of predictable, versatile, and switchable catalytic systems. The main cutting-edge strategies involving supramolecular chemistry and self-organization in catalysis will be discussed and compared in this review.

scholarly journals Cycloparaphenylene-Norbornene Monomers Afford Access to Carbon Nanohoop-Based Polymers

2019 ◽  
Author(s):  
Ruth Maust ◽  
Penghao Li ◽  
Lev N. Zakharov ◽  
Ramesh Jasti
Keyword(s):  
Small Molecule ◽  
Ring Opening ◽  
Polymeric Materials ◽  
Building Blocks ◽  
Functional Polymers ◽  
Size Dependent ◽  
Molecular Building Blocks ◽  
Polymer Architectures ◽  
Different Diameters ◽  
Critical Challenge

Although impressive strides have been made toward achieving precise polymer architectures, the pursuit of monomers with diverse structures and functions remains a critical challenge for polymer design. Herein we disclose the first polymers constructed from cycloparaphenylenes (CPPs), a family of strained, pi-rich macrocycles. Poly-CPPs were prepared via ring-opening metathesis polymerization (ROMP) of benzonorbornene-embedded CPPs. The distinctive size-dependent properties of CPPs, including fluorescence and host-guest chemistry, are preserved in poly-CPPs, offering a means to capitalize on these properties in polymeric materials. Moreover, copolymerizing CPPs of two different diameters results in polymers with emergent photophysical and supramolecular properties not achievable with small molecule CPP units. This work sets the stage for CPP derivatives to serve as molecular building blocks for the next generation of functional polymers.

scholarly journals Functional Materials Based on Cyclometalated Platinum(II) β-Diketonate Complexes: A Review of Structure–Property Relationships and Applications

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4236
Author(s):  
Ashanul Haque ◽  
Hani El Moll ◽  
Khalaf M. Alenezi ◽  
Muhammad S. Khan ◽  
Wai-Yeung Wong
Keyword(s):  
Photophysical Properties ◽  
Functional Materials ◽  
Polymeric Materials ◽  
Organometallic Complexes ◽  
Structure Property ◽  
Covalent Bonds ◽  
Ancillary Ligands ◽  
Structure Property Relationships ◽  
Materials Research ◽  
Recent Developments

Square planar organoplatinum(II) complexes have garnered immense interest in the area of materials research. The combination of the Pt(II) fragment with mono-, bi- tri- and tetradentate organic ligands gives rise to a large variety of complexes with intriguing properties, especially cyclometalated Pt(II) complexes in which ligands are connected through covalent bonds demonstrate higher stability, excellent photoluminescence properties, and diverse applications. The properties and applications of the Pt(II)-based materials can be smartly fine-tuned via a judicious selection of the cyclometalating as well as ancillary ligands. In this review, attempts have been made to provide a brief review of the recent developments of neutral Pt(II) organometallic complexes bearing bidentate cyclometalating ligands and β-diketonate ancillary ligands, i.e., (C^N)Pt(O^O) and (C^C)Pt(O^O) derivatives. Both small (monomeric, dimeric) and large (polymeric) materials have been considered. We critically assessed the role of functionalities (ligands) on photophysical properties and their impact on applications.

Combinatorial Peptide Libraries for Selecting Inorganic-Binding Proteins: A Step in Molecular Biomimetics

2003 ◽  
Vol 773 ◽  
Author(s):  
C. Tamerler ◽  
S. Dinçer ◽  
D. Heidel ◽  
N. Karagûler ◽  
M. Sarikaya
Keyword(s):  
Binding Proteins ◽  
Building Blocks ◽  
Molecular Engineering ◽  
Inorganic Materials ◽  
Combinatorial Peptide Libraries ◽  
Self Assembling ◽  
Complex Functions ◽  
Recent Developments ◽  
Specific Proteins ◽  
Molecular Biomimetics

AbstractProteins, one of the building blocks in organisms, not only control the assembly in biological systems but also provide most of their complex functions. It may be possible to assemble materials for practical technological applications utilizing the unique advantages provided by proteins. Here we discuss molecular biomimetic pathways in the quest for imitating biology at the molecular scale via protein engineering. We use combinatorial biology protocols to select short polypeptides that have affinity to inorganic materials and use them in assembling novel hybrid materials. We give an overview of some of the recent developments of molecular engineering towards this goal. Inorganic surface specific proteins were identified by using cell surface and phage display technologies. Examples of metal and metal oxide specific polypeptides were represented with an emphasis on certain level of specificities. The recognition and self assembling characteristics of these inorganic-binding proteins would be employed in develeopment of hybrid multifunctional materials for novel bio- and nano-technological applications.

A First Principles Approach for Partitioning Linear Response Properties into Additive and Cooperative Contributions

2018 ◽  
Author(s):  
Daniel Lambrecht ◽  
Eric Berquist
Keyword(s):  
First Principles ◽  
Linear Response ◽  
Building Blocks ◽  
Field Method ◽  
Response Property ◽  
Response Properties ◽  
Consistent Field ◽  
Molecular Building Blocks ◽  
Self Consistent ◽  
Self Consistent Field

We present a first principles approach for decomposing molecular linear response properties into orthogonal (additive) plus non-orthogonal/cooperative contributions. This approach enables one to 1) identify the contributions of molecular building blocks like functional groups or monomer units to a given response property and 2) quantify cooperativity between these contributions. In analogy to the self consistent field method for molecular interactions, SCF(MI), we term our approach LR(MI). The theory, implementation and pilot data are described in detail in the manuscript and supporting information.

scholarly journals Recent Developments in Lignin- and Tannin-Based Non-Isocyanate Polyurethane Resins for Wood Adhesives—A Review

2021 ◽  
Vol 11 (9) ◽  
pp. 4242
Author(s):  
Manggar Arum Aristri ◽  
Muhammad Adly Rahandi Lubis ◽  
Sumit Manohar Yadav ◽  
Petar Antov ◽  
Antonios N. Papadopoulos ◽  
...  
Keyword(s):  
Automotive Industry ◽  
Polymeric Materials ◽  
Review Article ◽  
Future Perspectives ◽  
Wood Adhesives ◽  
Adhesion Properties ◽  
Lighting Industry ◽  
Renewable Natural Resources ◽  
Recent Developments ◽  
Strong Adhesion

This review article aims to summarize the potential of using renewable natural resources, such as lignin and tannin, in the preparation of NIPUs for wood adhesives. Polyurethanes (PUs) are extremely versatile polymeric materials, which have been widely used in numerous applications, e.g., packaging, footwear, construction, the automotive industry, the lighting industry, insulation panels, bedding, furniture, metallurgy, sealants, coatings, foams, and wood adhesives. The isocyanate-based PUs exhibit strong adhesion properties, excellent flexibility, and durability, but they lack renewability. Therefore, this study focused on the development of non-isocyanate polyurethane lignin and tannin resins for wood adhesives. PUs are commercially synthesized using polyols and polyisocyanates. Isocyanates are toxic, costly, and not renewable; thus, a search of suitable alternatives in the synthesis of polyurethane resins is needed. The reaction with diamine compounds could result in NIPUs based on lignin and tannin. The research on bio-based components for PU synthesis confirmed that they have good characteristics as an alternative for the petroleum-based adhesives. The advantages of improved strength, low curing temperatures, shorter pressing times, and isocyanate-free properties were demonstrated by lignin- and tannin-based NIPUs. The elimination of isocyanate, associated with environmental and human health hazards, NIPU synthesis, and its properties and applications, including wood adhesives, are reported comprehensively in this paper. The future perspectives of NIPUs’ production and application were also outlined.

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