Macromol. Chem. Phys. 14/2013

Zhang, Lei; Zhou, Guowei; Sun, Bin; Chen, Fengjiao; Zhao, Minnan; Li, Tianduo

doi:10.1002/macp.201370052

Cited by 4 publications

(4 citation statements)

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“…These ndings agree with previous work describing faster polymerization rates for MMA (vs. TFEMA). 71,72 The chain extension of PTFEMA and PMMA polymer brushes resulted in a lm thickness increase to d FjFlA-MA z 34 ± 3 nm and d MjFlA-MA z 38 ± 2 nm, respectively (see Table 1).…”

Section: Quantifying Hydrolysis Of the Silane Anchoring Groupmentioning

confidence: 99%

Hydrolysis-resistant heterogeneous photocatalysts for PET-RAFT polymerization in aqueous environments

et al. 2023

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Section: Quantifying Hydrolysis Of the Silane Anchoring Groupmentioning

confidence: 99%

Hydrolysis-resistant heterogeneous photocatalysts for PET-RAFT polymerization in aqueous environments

et al. 2023

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“…This deactivator will finally react with a propagating chain to regenerate Ir(III). This photocatalysis was successfully applied under visible light to the CRP of methacrylates 36,37,39 and acrylates. 42 On the contrary, contributions reported so far on photocatalyzed ATRP resorting to complexes based on Cu or Ru have evidenced catalytic cycles involving a reductive quenching.…”

Section: ■ Introductionmentioning

confidence: 99%

Photocatalyzed Cu-Based ATRP Involving an Oxidative Quenching Mechanism under Visible Light

et al. 2015

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A new type of photocatalyzed Cu-based atom transfer radical polymerization (ATRP) is described, involving directly the light absorption of the activator form of the copper complex Cu(I). The selected catalyst was bis(1,10-phenanthroline)copper(I), Cu(phen) 2 + , due to its intense absorption in the visible domain, which permitted to use very soft irradiation conditions, consisting of a simple household blue LED at 0.9 W. An excellent control over the polymerization of methyl methacrylate (MMA) in dimethylformamide (DMF) was observed under irradiation in these conditions, using ethyl α-bromophenylacetate (EBPA) as the initiator, with polydispersity indexes (PDI) as low as 1.10 while using low catalyst content (80 ppm). The proposed mechanism implies first the formation under irradiation of the excited state of the activator form of the complex Cu(I)*. It can then rapidly undergo the oxidative quenching of the alkyl bromide, which results in its conversion into the deactivator form of the complex Cu(II)−Br along with the generation of a propagating radical. The setting up of the ATRP equilibrium ensues. Additionally, it was possible to complete the catalysis mechanism by adding triethylamine (TEA), which permitted a faster polymerization, thanks to a faster regeneration of the activator Cu(I). An excellent control over the polymerization was also observed in the presence of TEA, with PDI as low as 1.06. The addition of TEA allowed also to use a catalyst loading as low as 20 ppm, while maintaining a good controllability.

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“…Therefore, LbL‐OSCs have great potential to avoid the complicated photoactive layer phase separation associated with the BHJ‐OSCs, widening the room for fine‐tuning the photoactive layer morphology [16,24, 28] . More importantly, the sequentially deposition of donor and acceptor materials also enables the formation of a more favorable vertical component distribution featured with a p‐i‐n like structure, which not only provides sufficient D/A interfaces but also enables higher purity of donor and acceptor domains, benefiting the exciton dissociation, charge transportation and collection by the respective electrodes [25,31,37–38] . For these reasons, further breakthroughs in the device performances are expected by rational material design and device engineering for LbL‐OSCs.…”

Section: Introductionmentioning

confidence: 99%

Layer‐by‐Layer Organic Solar Cells Enabled by 1,3,4‐Selenadiazole‐Containing Crystalline Small Molecule with Double‐Fibril Network Morphology

Chen,

Li,

Jing

et al. 2024

Angew Chem Int Ed

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A double‐fibril network of the photoactive layer morphology is recognized as an ideal structure facilitating exciton diffusion and charge carrier transport for high‐performance organic solar cells (OSCs). However, in the layer‐by‐layer processed OSCs (LbL‐OSCs), polymer donors and small molecule acceptors (SMAs) are separately deposited, and it is challenging to realize a fibril network of pure SMAs with the absence of tight interchain entanglement as polymers. In this work, crystalline small molecule donors (SMDs), named TDZ‐3TR and SeDZ‐3TR, were designed and introduced into the L8‐BO acceptor solution, forcing the phase separation and molecular fibrilization. SeDZ‐3TR showed higher crystallinity and lower miscibility with L8‐BO acceptor than TDZ‐3TR, enabling more driving force to favor the phase separation and better molecular fibrilization of L8‐BO. On the other hand, two donor polymers of PM6 and D18 with different fibril widths and lengths were put together to optimize the fibril network of the donor layer. The simultaneously optimization of the acceptor and donor layers resulted in a more ideal double‐fibril network of the photoactive layer and an impressive power conversion efficiency (PCE) of 19.38% in LbL‐OSCs.

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Macromol. Chem. Phys. 14/2013

Cited by 4 publications

References 0 publications

Hydrolysis-resistant heterogeneous photocatalysts for PET-RAFT polymerization in aqueous environments

Hydrolysis-resistant heterogeneous photocatalysts for PET-RAFT polymerization in aqueous environments

Photocatalyzed Cu-Based ATRP Involving an Oxidative Quenching Mechanism under Visible Light

Layer‐by‐Layer Organic Solar Cells Enabled by 1,3,4‐Selenadiazole‐Containing Crystalline Small Molecule with Double‐Fibril Network Morphology

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