Evidence map›Paper›PMID 33531482›Full record

ArticleNature communications2021

Accelerated polymerization of N-carboxyanhydrides catalyzed by crown ether.

Yingchun Xia, Ziyuan Song, Zhengzhong Tan, Tianrui Xue, Shiqi Wei, Lingyang Zhu, Yingfeng Yang, Hailin Fu, Yunjiang Jiang, Yao Lin and 3 more

Open access · goldAbstract read
In one paragraph

Article in Nature communications, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
4.9field-weighted citation impact, top 4% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

19 citing papers in PubMed, 94 citations in OpenAlex.

  1. Review
  2. Article
  3. A bioinspired and degradable riboflavin-containing polypeptide as a sustainable material for energy storage.Proceedings of the National Academy of Sciences of the United States of America · 2025
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  5. Synthetic Polymers for Drug, Gene, and Vaccine Delivery.Polymer science & technology (Washington, D.C.) · 2025
    Review
  6. Article
  7. Article
  8. Review
  9. Article
  10. Nanocomposites of Poly(Polymers · 2024
    Article
  11. Article
  12. Article
  13. Article
  14. Biodegradable Polymers and Polymer Composites with Antibacterial Properties.International journal of molecular sciences · 2023
    Review
  15. Memory Effect in Thermoresponsive Proline-based Polymers.Angewandte Chemie (International ed. in English) · 2022
    Article
  16. Article
  17. Polymers · 2021
    Article
  18. Article
  19. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

13 authors at 4 institutions in 2 countries.

Yingchun Xia *Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.ORCID 0000-0001-5438-8846
Ziyuan Song *Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.ORCID 0000-0002-3165-3712
Zhengzhong TanDepartment of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.ORCID 0000-0002-2392-2935
Tianrui XueDepartment of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
Shiqi WeiDepartment of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.ORCID 0000-0002-7585-0734
Lingyang ZhuNMR Laboratory, School of Chemical Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.ORCID 0000-0002-6657-271X
Yingfeng YangDepartment of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
Hailin FuDepartment of Chemistry and Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, CT, 06269, USA.
Yunjiang JiangDepartment of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.ORCID 0000-0003-0931-0577
Yao LinDepartment of Chemistry and Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, CT, 06269, USA.ORCID 0000-0001-5227-2663
Yanbing LuInstitute of Polymer Science, College of Chemistry & Chemical Engineering, Hunan University, 410082, Changsha, China. yanbinglu@hnu.edu.cn.ORCID 0000-0002-9749-5809
Andrew L FergusonPritzker School of Molecular Engineering, University of Chicago, Chicago, IL, 60637, USA. andrewferguson@uchicago.edu.ORCID 0000-0002-8829-9726
Jianjun ChengDepartment of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA. jianjunc@illinois.edu.ORCID 0000-0003-2561-9291
University of Illinois Urbana-Champaign · USUniversity of Connecticut · USHunan University · CNUniversity of Chicago · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The recent advances in accelerated polymerization of N-carboxyanhydrides (NCAs) enriched the toolbox to prepare well-defined polypeptide materials. Herein we report the use of crown ether (CE) to catalyze the polymerization of NCA initiated by conventional primary amine initiators in solvents with low polarity and low hydrogen-bonding ability. The cyclic structure of the CE played a crucial role in the catalysis, with 18-crown-6 enabling the fastest polymerization kinetics. The fast polymerization kinetics outpaced common side reactions, enabling the preparation of well-defined polypeptides using an α-helical macroinitiator. Experimental results as well as the simulation methods suggested that CE changed the binding geometry between NCA and propagating amino chain-end, which promoted the molecular interactions and lowered the activation energy for ring-opening reactions of NCAs. This work not only provides an efficient strategy to prepare well-defined polypeptides with functionalized C-termini, but also guides the design of catalysts for NCA polymerization.

Identifiers

PMID33531482
PMCPMC7854670
OpenAlexW3126905106

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.