Self-Assembly of Functionalized [2]Catenanes Bearing a Reactive Functional Group on either One or Both Macrocyclic ComponentsFrom Monomeric [2]Catenanes to Polycatenanes†

1998 ◽  
Vol 31 (2) ◽  
pp. 295-307 ◽  
Author(s):  
Stephan Menzer ◽  
Andrew J. P. White ◽  
David J. Williams ◽  
Martin Bělohradský ◽  
Christoph Hamers ◽  
...  
Keyword(s):  
Self Assembly ◽  
Functional Group ◽  
Reactive Functional Group

Synthesis of Polystyrene-B-Poly(Ethylene Oxide)monomethyl Ethermethacrylate Block Copolymers and its Self-Assembly in Aqueous Solution

2011 ◽  
Vol 284-286 ◽  
pp. 769-772
Author(s):  
Qian Qian You ◽  
Pu Yu Zhang
Keyword(s):  
Aqueous Solution ◽  
Molecular Weight ◽  
Block Copolymers ◽  
Self Assembly ◽  
Chain Transfer ◽  
Functional Group ◽  
Transmission Electron ◽  
Reversible Addition ◽  
Ft Ir ◽  
A Chain

The block copolymer of PSt-b-POEOMA with the end of -COOH functional group has been synthesized by reversible addition fragmentation chain-transfer (RAFT) using S,S′-Bis(α,α′-dimethyl-α′′-acetic acid)-trithiocarbonate (BDATC) as a chain transfer agent. The architectures of the copolymers were confirmed by FT-IR and 1HNMR spectra. GPC analysis was used to estimate the molecular weight and the molecular weight distribution of the copolymers. Meanwhile, The nanostructures of the block copolymers PSt-b-POEOMA micelles formed in aqueous solution were observed by transmission electron microscopy (TEM) and dynamic light scattering (DLS).

Amphiphilic dendrons with a pyrene functional group at the focal point: synthesis, self-assembly and generation-dependent DNA condensation

2017 ◽  
Vol 8 (33) ◽  
pp. 4798-4804 ◽  
Author(s):  
Yi Han ◽  
Bo Zhu ◽  
Ying Chen ◽  
Zhishan Bo ◽  
Yulan Chen
Keyword(s):  
Fluorescent Probe ◽  
Self Assembly ◽  
Functional Group ◽  
Focal Point ◽  
Dna Condensation ◽  
Dual Functional

Dendritic amphiphiles with a dual-functional pyrene as a fluorescent probe and hydrophobe at the focal point exhibited generation-dependent self-assembly and DNA condensation.

scholarly journals Marginal defects modified graphene with S-C-N-C groups for highly selective oxygen reduction to H2O2

2021 ◽  
Author(s):  
Zhixing Mou ◽  
Yue-Wen Mu ◽  
Lijia Liu ◽  
Daili Cao ◽  
Shuai Chen ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Oxygen Reduction ◽  
Self Assembly ◽  
Active Sites ◽  
Functional Group ◽  
H2o2 Production ◽  
Sulfur Source ◽  
Highly Active ◽  
Slow Kinetics ◽  
Doped Graphene

Abstract Developing efficient metal-free catalysts to achieve electrochemical synthesis of hydrogen peroxide (H2O2) is crucial for substituting traditional energy-intensive anthraquinone process. Heteroatom-doped carbon materials have shown great potential toward 2e-pathway for catalyzing oxygen reduction to hydrogen peroxide (ORHP). However, conventional nanocarbon electrocatalysts show slow kinetics toward ORHP due to the weak binding strength with OOH* intermediate, resulting reduction of O2 to H2O. Here, sulfur and nitrogen dual-doped graphene (SNC) electrocatalyst consisting of S-C-N-C functional group are synthesized through hydrothermal self-assembly and nitridation processes with thiourea as sulfur source. In S-C-N-C functional group, pentagon-S and pyrrolic-N are covalently grafted onto the edge of graphene and produce marginal carbon ring defects, which provide highly active sites for catalyzing ORHP. The obtained SNC catalysts deliver an outstanding ORHP activity and selectivity for H2O2 production, while retaining remarkable stability. The experimental and computational results reveal that marginal S-C-N-C functional groups afford an appropriate adsorption strength with OOH* intermediate and a low reaction barrier as well, which are essential for the activity of ORHP.

scholarly journals Adjacent functional group effects on the assembly of columnar liquid crystals

2020 ◽  
Vol 98 (7) ◽  
pp. 379-385
Author(s):  
Carson O. Zellman ◽  
Danielle Vu ◽  
Vance E. Williams
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Self Assembly ◽  
Room Temperature ◽  
Functional Group ◽  
The Self ◽  
Clearing Temperature ◽  
Crystal Phases ◽  
Potential Strategy ◽  
The Impact

Although the impact of individual functional groups on the self-assembly of columnar liquid crystal phases has been widely studied, the effect of varying multiple substituents has received much less attention. Herein, we report a series of dibenzo[a,c]phenazines containing an alcohol or ether adjacent to an electron-withdrawing ester or acid. With one exception, these difunctional mesogens form columnar phases. The phase behavior appeared to be dominated by the electron-withdrawing substituent; transition temperatures were similar to derivatives with these groups in isolation. In most instances, the addition of an electron-donating group ortho to an ester or acid suppressed the melting temperature and elevated the clearing temperature, leading to broader liquid crystal thermal ranges. This effect was more pronounced for derivatives functionalized with longer chain hexyloxy groups. These results suggest a potential strategy for controlling the phase ranges of columnar liquid crystals and achieving room temperature mesophases.

Construction of Nonbiofouling Biofunctional Glass Surface by Self-Assembled Monolayer and Graft Hydrophilic Polymer

2008 ◽  
Vol 47-50 ◽  
pp. 1343-1346 ◽  
Author(s):  
Zong Bin Liu ◽  
Bei Zhang ◽  
Brian Yu Fung Pow ◽  
Mo Yang ◽  
Arthur Fuk Tak Mak
Keyword(s):  
Graft Polymerization ◽  
Functional Group ◽  
Substrate Surface ◽  
Surface Modifications ◽  
Activation Process ◽  
Self Assembled Monolayer ◽  
Functional Part ◽  
Reactive Functional Group ◽  
Self Assembled ◽  
Glass Surfaces

This paper introduces a new method of surface modification by self-assembled monolayer (SAM) and polymer monolayer grafting. Since most of the glass surfaces lack the reactive functional group, an activation process with 3-(trimethoxysilyl)propyl methacrylate(TPM) is used in our experiment to generate the vinyl reactive sites on the substrate surface for further graft polymerization. The TPM saline layer acts as the “anchor” part to link the functional part onto the surface of substrate. The paper summarizes the surface modifications by the polymerizations of PEGMA, AA(Acrylic acid) and NVP(Nitrogen-vinyl-2-pyrrolidone) respectively and their applications for protein adsorption and cell adhesion through a series of measurements. In previous research, AA and NVP had also been adopted for surface treatment and had achieved good results. The substrate can be glass, alumina, silicon, metals or stainless steel. We choose glass as our substrate during the experiment.

scholarly journals Direct subphthalocyanine conjugation to bombesin vs. indirect conjugation to its lipidic nanocarrier

2016 ◽  
Vol 14 (19) ◽  
pp. 4511-4518 ◽  
Author(s):  
Yann Bernhard ◽  
Elodie Gigot ◽  
Victor Goncalves ◽  
Mathieu Moreau ◽  
Nicolas Sok ◽  
...  
Keyword(s):  
Contrast Agents ◽  
Functional Group ◽  
Reactive Functional Group ◽  
Second Chance

Azido-liposomes give fluorophores/contrast agents with no reactive functional group available on their backbone a second chance to be (indirectly) bioconjugated (with bombesin).

Functional group engineering in naphthalimides: a conceptual insight to fine-tune the supramolecular self-assembly and condensed state luminescence

Nanoscale ◽  
2019 ◽  
Vol 11 (28) ◽  
pp. 13233-13242 ◽  
Author(s):  
Niranjan Meher ◽  
Parameswar Krishnan Iyer
Keyword(s):  
Self Assembly ◽  
Functional Group ◽  
Molecular System ◽  
Photophysical Properties ◽  
Effective Control ◽  
Condensed State ◽  
Fine Tune ◽  
State Luminescence

A simple synthetic tweak of functional group engineering has been unveiled to fine-tune the supramolecular self-assembly and condensed state photophysical properties in small molecular system with effective control on ACQ/AIEE regulation.

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