Preparation by controlled radical polymerization and self-assembly via base-recognition of synthetic polymers bearing complementary nucleobases

Nanotubes assembled from macrocyclic precursors offer a unique combination of low dimensionality, structural rigidity, and distinct interior and exterior microenvironments. Usually the weak stacking energies of macrocycles limit the length or strength of the resultant nanotubes. Imine-linked macrocycles were recently found to assemble into high-aspect ratio (>103), lyotropic nanotubes in the presence of excess acid. Yet these harsh conditions are incompatible with many functional groups and processing methods, and lower acid loadings instead catalyze macrocycle degradation. Here we report pyridine-2,6-diimine-linked macrocycles that assemble into high-aspect ratio nanotubes in the presence of less than 1 equiv of CF3CO2H per macrocycle. Analysis by gel permeation chromatography and fluorescence spectroscopy revealed a cooperative self-assembly mechanism. Nanofibers obtained by touch-spinning the pyridinium-based nanotubes exhibit Young’s moduli of 1.48 GPa, which exceeds that of many synthetic polymers and biological filaments. These findings will enable the design of structurally diverse nanotubes from synthetically accessible macrocycles.

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Exploring Chromophore Tethered Aminoethers as Potential Photoinitiators for Controlled Radical Polymerization.

10.21236/ada370961 ◽

1999 ◽

Author(s):

S. Hu ◽

J. H. Malpert ◽

X. Yang ◽

D. C. Neckers

Keyword(s):

Radical Polymerization ◽

Controlled Radical Polymerization

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In Situ Preparation of Polymer Nanocomposites Based on Sols of Surface-Modified Detonation Nanodiamonds by Classical and Controlled Radical Polymerization

Polymer Science Series B ◽

10.1134/s1560090420050139 ◽

2020 ◽

Vol 62 (6) ◽

pp. 734-749

Author(s):

E. V. Sivtsov ◽

A. V. Kalinin ◽

A. I. Gostev ◽

A. V. Smirnov ◽

L. V. Agibalova ◽

...

Keyword(s):

Radical Polymerization ◽

Polymer Nanocomposites ◽

Controlled Radical Polymerization ◽

Detonation Nanodiamonds ◽

In Situ Preparation ◽

Surface Modified

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Controlled radical polymerization of hydrophilic and zwitterionic brush-like polymers from silk fibroin surfaces

Journal of Materials Chemistry B ◽

10.1039/d0tb01990a ◽

2020 ◽

Vol 8 (45) ◽

pp. 10392-10406

Author(s):

Danielle L. Heichel ◽

Ngoc Chau H. Vy ◽

Shawn P. Ward ◽

Douglas H. Adamson ◽

Kelly A. Burke

Keyword(s):

Protein Adsorption ◽

Radical Polymerization ◽

Silk Fibroin ◽

Cell Attachment ◽

Controlled Radical Polymerization

Silk fibroin films were modified with zwitterionic and hydrophilic brush-like polymers via surface-initiated ATRP, resulting in surfaces that reduced protein adsorption and cell attachment.

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