Simultaneous Preparation of Multiple Polymer Brushes under Ambient Conditions using Microliter Volumes

Narupai, Benjaporn; Page, Zachariah A.; Treat, Nicolas J.; McGrath, Alaina J.; Pester, Christian W.; Discekici, Emre H.; Dolinski, Neil D.; Meyers, Gregory F.; Alaniz, Javier Read de; Hawker, Craig J.

doi:10.1002/anie.201805534

Cited by 79 publications

(104 citation statements)

References 41 publications

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“…Importantly, control experiments with BA in DMAc under these conditions did not produce any undesired autopolymerization (see Table S14). ThePCs 1-7 were then evaluated for the O-ATRP of BA under continuous-flow conditions,s howing similar trends in performance as batch conditions,albeit with consistently lower ( Table 2, entries [8][9][10][11][12][13][14]. Again, 2 proved superior,however with initial high > 1.5 at conversions less than 50 %, with = 1.35 (I* = 97 %at8 1% conversion).…”

Section: Application Of Dimethyl Dihydroacridines To O-atrp Of Acrylamentioning

confidence: 96%

“…[9] Since then, other organic PCs derived from N,N-diaryl dihydrophenazine [10] and N-aryl phenoxazine [11] families,a mong others, [12] have been developed ( Figure 1b). N-aryl phenothiazine PCs have been applied in diverse contexts [13] and have also been used for mechanistic analysis. [14] Recently,P Cstructure-property relationships have been studied using N,N-diaryl dihydrophenazine and N-aryl phenoxazine PCs.…”

Section: Introductionmentioning

confidence: 99%

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Dimethyl Dihydroacridines as Photocatalysts in Organocatalyzed Atom Transfer Radical Polymerization of Acrylate Monomers

2020

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Development of photocatalysts (PCs) with diverse properties has been essential in the advancement of organocatalyzeda tom transfer radical polymerization (O-ATRP). Dimethyl dihydroacridines are presented here as anew family of organic PCs,for the first time enabling controlled polymerization of challenging acrylate monomers by O-ATRP.S tructure-property relationships for seven PCs are established, demonstrating tunable photochemical and electrochemical properties,and accessing astrongly oxidizing 2 PCC + intermediate for efficient deactivation. In O-ATRP,t he combination of PC,i mplementation of continuous-flowr eactors,a nd promotion of deactivation through addition of LiBr are critical to producing well-defined acrylate polymers with dispersities as low as 1.12. The utility of this approach is established through demonstration of the oxygen-tolerance of the system and application to diverse acrylate monomers,i ncluding the synthesis of well-defined di-and triblockcopolymers. Figure 1. a) Proposed mechanism of O-ATRP. b) Previously reported PCs developed for O-ATRP (left) with the new dimethyl-dihydroacridine PC family investigatedi nthis work (right).

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Section: Application Of Dimethyl Dihydroacridines To O-atrp Of Acrylamentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Dimethyl Dihydroacridines as Photocatalysts in Organocatalyzed Atom Transfer Radical Polymerization of Acrylate Monomers

2020

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“…This is considerably denser than PMMA brushes prepared by state-of-art SI-ATRP methods with 0.28 chains nm À2 using as ame characterization method. [17] Theh ighest grafting density of 0.54 AE 0.02 chains nm À2 for "on water" SI-CuCRP was determined for aPMA brush. Grafting densities for other hydrophobic monomers are higher but decreases with monomer size and reactivity (Table 1a nd S1).…”

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confidence: 99%

“On Water” Surface‐initiated Polymerization of Hydrophobic Monomers

Che

Zhang

et al. 2018

Angew Chem Int Ed

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We present the "on water" surface-initiated Cumediated controlled radical polymerization ("on water" SI-CuCRP) that converts hydrophobic monomers in aqueous reaction medium to polymer brushes at unparalleled speed and efficiency.The method allows the facile conversion of avariety of common monomers under most simple reaction conditions and with minimal monomer amounts to thicka nd homogeneous polymer brushes.The highly living character of the "on water" SI-CuCRP allowed the preparation of decablock (homo)polymer brushes and opens the pathway to sequentially controlled polymer brushes on solids.

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“…The assembly was done on a benchtop under normal atmosphere (Figure c). Analog to our previous report, this most simple methodology allows the preparation of polymer brushes of choice from hydrophobic vinyl monomers under ambient conditions and is basically scalable to any substrate size …”

Section: Figurementioning

confidence: 88%