scholarly journals Features that make macromolecules 2D polymers

2021 ◽  
Vol 161 ◽  
pp. 104856
Author(s):  
A. Dieter Schlüter
Keyword(s):  
2D Polymers

scholarly journals Template-Free Self-Assembly of Two-Dimensional Polymers into Nano/Microstructured Materials

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3310
Author(s):  
Shengda Liu ◽  
Jiayun Xu ◽  
Xiumei Li ◽  
Tengfei Yan ◽  
Shuangjiang Yu ◽  
...  
Keyword(s):  
Self Assembly ◽  
Recent Progress ◽  
Two Dimensional ◽  
Subsequent Removal ◽  
The Past ◽  
2D Polymers ◽  
Template Free ◽  
Self Assembled ◽  
The Relationship ◽  
Polymer Tubes

In the past few decades, enormous efforts have been made to synthesize covalent polymer nano/microstructured materials with specific morphologies, due to the relationship between their structures and functions. Up to now, the formation of most of these structures often requires either templates or preorganization in order to construct a specific structure before, and then the subsequent removal of previous templates to form a desired structure, on account of the lack of “self-error-correcting” properties of reversible interactions in polymers. The above processes are time-consuming and tedious. A template-free, self-assembled strategy as a “bottom-up” route to fabricate well-defined nano/microstructures remains a challenge. Herein, we introduce the recent progress in template-free, self-assembled nano/microstructures formed by covalent two-dimensional (2D) polymers, such as polymer capsules, polymer films, polymer tubes and polymer rings.

scholarly journals Enriching and Quantifying Porous Single Layer 2D Polymers by Exfoliation of Chemically Modified van der Waals Crystals

2020 ◽  
Vol 132 (14) ◽  
pp. 5732-5744
Author(s):  
Ralph Z. Lange ◽  
Kevin Synnatschke ◽  
Haoyuan Qi ◽  
Niklas Huber ◽  
Gregor Hofer ◽  
...  
Keyword(s):  
Van Der Waals ◽  
Single Layer ◽  
Chemically Modified ◽  
2D Polymers

scholarly journals Transformation Between 2D and 3D Covalent Organic Frameworks via Reversible [2+2] Cycloaddition

2020 ◽  
Author(s):  
Thaksen Jadhav ◽  
Yuan Fang ◽  
Cheng-Hao Liu ◽  
Afshin Dadvand ◽  
Ehsan Hamzehpoor ◽  
...  
Keyword(s):  
Band Structure ◽  
Absorption Edge ◽  
Room Temperature ◽  
Three Dimensional ◽  
Cross Linking ◽  
Two Dimensional ◽  
Covalent Organic Frameworks ◽  
Doping Behavior ◽  
2D Polymers ◽  
2D And 3D

We report the first transformation between crystalline vinylene-linked two-dimensional (2D) polymers and crystalline cyclobutane-linked three-dimensional (3D) polymers. Specifically, absorption-edge irradiation of the 2D poly(arylenevinylene) covalent organic frameworks (COFs) results in topological [2+2] cycloaddition cross-linking the π-stacked layers in 3D COFs. The reaction is reversible and heating to 200°C leads to a cycloreversion while retaining the COF crystallinity. The resulting difference in connectivity is manifested in the change of mechanical and electronic properties, including exfoliation, blue-shifted UV-Vis absorption, altered luminescence, modified band structure and different acid-doping behavior. The Li-impregnated 2D and 3D COFs show a significant ion conductivity of 1.8×10<sup>−4</sup> S/cm and 3.5×10<sup>−5</sup> S/cm, respectively. Even higher room temperature proton conductivity of 1.7×10<sup>-2</sup> S/cm and 2.2×10<sup>-3</sup> S/cm was found for H<sub>2</sub>SO<sub>4</sub>-treated 2D and 3D COFs, respectively.

scholarly journals Short‐Range Structural Correlations in Amorphous 2D Polymers

ChemPhysChem ◽  
2019 ◽  
Vol 20 (18) ◽  
pp. 2340-2347
Author(s):  
Patrick Alexa ◽  
Christina Oligschleger ◽  
Pascal Gröger ◽  
Claudius Morchutt ◽  
Vijay Vyas ◽  
...  
Keyword(s):  
Short Range ◽  
2D Polymers

Bridging different Co4–calix[4]arene building blocks into grids, cages and 2D polymers with chiral camphoric acid

CrystEngComm ◽  
2015 ◽  
Vol 17 (8) ◽  
pp. 1750-1753 ◽  
Author(s):  
Kongzhao Su ◽  
Feilong Jiang ◽  
Jinjie Qian ◽  
Jiandong Pang ◽  
Falu Hu ◽  
...  
Keyword(s):  
Building Blocks ◽  
2D Polymers ◽  
Camphoric Acid

scholarly journals Putting aromatic compounds to work: Rational synthesis of organic 2D polymers

2012 ◽  
Vol 84 (4) ◽  
pp. 861-867 ◽  
Author(s):  
A. Dieter Schlüter ◽  
Junji Sakamoto
Keyword(s):  
Aromatic Compounds ◽  
Spectroscopic Analysis ◽  
Crystal Packing ◽  
Metal Salts ◽  
Raman Spectroscopic ◽  
First Case ◽  
Air Water Interface ◽  
2D Polymers ◽  
The Impact ◽  
Raman Spectroscopic Analysis

This contribution describes two different approaches aimed at the synthesis of monolayer molecular sheets with internal order, or, in other words, 2D polymers. First, an interfacial strategy is presented in which terpyridene-based hexafunctional monomers spread at the air/water interface are connected to one another with the help of metal salts. While this approach leads to micrometer-sized monolayer sheets that are mechanically stable enough to be spanned over several micrometer-sized holes, their internal structure could not yet be proven. The second approach rests upon solid-state photochemistry, and properly designed monomers are covalently connected with one another while being held in layered geometries owing to crystal packing. Exfoliation to single sheets can be achieved, and molecular structure is supported by a Raman spectroscopic analysis. We consider this the first case of a rational synthesis of 2D polymers and briefly touch on the impact this may have.

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