CoChat
Sign Up
Cited by 8biodegradable polymer synthesis and propertiesOrganometallic Complex Synthesis and CatalysisCarbon dioxide utilization in catalysis

Cation–π interactions enabling hard/soft Ti/Ag heterobimetallic cooperativity in lactide ring-opening polymerisation

Open access
Baker, Chloe A., Romain, Charles, Long, Nicholas J.·2021·Chemical Communications
DOI 10.1039/d1cc05083d
Open this paper in CoChat — free accountOpen PDF

Abstract

The combination of a Ti-salen complex with AgBArF reveals unique hard/soft heterobimetallic cooperativity in lactide ring-opening polymerisation (ROP), enabling significant activity at room temperature. Reactivity, mechanistic and computational studies highlight the role of cation-π interactions in the formation of heterobimetallic species and provide key insights into the role of both metals in ROP.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1039/d1cc05083d

Cites

45 of 45 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • This revealed that the metals can 'turn each other on' in a mixed-metal system.

    “This revealed that the metals can 'turn each other on' in a mixed-metal system.”

    From Multinuclear metal catalysts in ring-opening polymerization of ε‑caprolactone and lactide: Cooperative and electronic effects between metal centers (2023) · cites this paper as [93]

  • In CL ROP, the homo-dinuclear Zn complex 77 and Co complex 78 were inactive compared with the heterobimetallic Co-Zn complex 79 with high catalytic activity (24 h, conversion = 99.8 % at 130 °C).

    “In CL ROP, the homo-dinuclear Zn complex 77 and Co complex 78 were inactive compared with the heterobimetallic Co-Zn complex 79 with high catalytic activity (24 h, conversion = 99.8 % at 130 °C).”

    From Multinuclear metal catalysts in ring-opening polymerization of ε‑caprolactone and lactide: Cooperative and electronic effects between metal centers (2023) · cites this paper as [93]

    The paper’s ROP results (Table 1; page not provided) concern Ti-salen and AgBArF in lactide polymerisation, not Co–Zn complexes in caprolactone (CL) polymerisation. Searches for Co–Zn, complexes 77–79, and 99.8% conversion at 130 °C found no passage addressing the attributed result. (LLM, conf=0.78)

    Experimental — accuracy not yet measured

  • Hetero-bimetallic Co-Zn complex 79 also exhibited good controllability for producing polymer with a narrow Ð value (1.23 for PVL) compared with homo-dinuclear Co complex 78 (Ð = 1.42).

    “In addition, hetero-bimetallic Co-Zn complex 79 also exhibited good controllability for producing polymer with a narrow Ð value (1.23 for PVL) compared with homo-dinuclear Co complex 78 (Ð = 1.42).”

    From Multinuclear metal catalysts in ring-opening polymerization of ε‑caprolactone and lactide: Cooperative and electronic effects between metal centers (2023) · cites this paper as [93]

    Table 1 reports dispersity for Ti-salen/AgBArF-catalysed lactide polymerisation, not PVL made with Co–Zn complex 79 or Co complex 78. Searches for the complex numbers, Co–Zn, PVL, and the stated dispersity values found no passage addressing that comparison in our copy. (LLM, conf=0.76)

    Experimental — accuracy not yet measured

  • In VL ROP, the hetero-bimetallic Co-Zn complex 79 (24 h, conversion = 99.4 % at 130 °C) exhibited higher catalytic activity than did the homo-dinuclear Zn complex 77 (24 h, conversion = 4.4 %) and Co complex 78 (24 h, conversion = 38.4%).

    “In VL ROP, the hetero-bimetallic Co-Zn complex 79 (24 h, conversion = 99.4 % at 130 °C) exhibited higher catalytic activity than did the homo-dinuclear Zn complex 77 (24 h, conversion = 4.4 %) and Co complex 78 (24 h, conversion = 38.4%).”

    From Multinuclear metal catalysts in ring-opening polymerization of ε‑caprolactone and lactide: Cooperative and electronic effects between metal centers (2023) · cites this paper as [93]

    The paper’s ROP results table reports conversions for a Ti-salen/AgBArF system using lactide, not the Co–Zn, Zn, and Co complexes in the claim. Searches for valerolactone, Co–Zn, and the stated conversion percentages found no passage addressing that comparison. The available passages have no page labels. (LLM, conf=0.76)

    Experimental — accuracy not yet measured

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Research works printed but not linked: 41

  1. R. Maity, B. S. Birenheide, F. Breher and B. Sarkar, Chem- CatChem, 2021, 13, 2337-2370;
  2. C. Robert and C. M. Thomas, Chem. Soc. Rev., 2013, 42, 9392-9402;
  3. T. L. Lohr and T. J. Marks, Nat. Chem., 2015, 7, 477-482.
  4. P. Buchwalter, J. Rose ´and P. Braunstein, Chem. Rev., 2015, 115, 28-126;
  5. D. Das, S. S. Mohapatra and S. Roy, Chem. Soc. Rev., 2015, 44, 3666-3690;
  6. R. M. Haak, S. J. Wezenberg and A. W. Kleij, Chem. Commun., 2010, 46, 2713-2723.
  7. W. Gruszka and J. A. Garden, Nat. Commun., 2021, 12, 3252;
  8. Z. Cai, D. Xiao and L. H. Do, Comments Inorg. Chem., 2019, 39, 27-50;
  9. J. P. McInnis, M. Delferro and T. J. Marks, Acc. Chem. Res., 2014, 47, 2545-2557;
  10. M. Khoshsefat, Y. Ma and W.-H. Sun, Coord. Chem. Rev., 2021, 434, 213788.
  11. A. B. Kremer and P. Mehrkhodavandi, Coord. Chem. Rev., 2019, 380, 35-57.
  12. R. G. Pearson, J. Am. Chem. Soc., 1963, 85, 3533-3539.
  13. Y. Sun, L. Wang, D. Yu, N. Tang and J. Wu, J. Mol. Catal. A: Chem., 2014, 393, 175-181;
  14. M. J. Walton, S. J. Lancaster and C. Redshaw, ChemCatChem, 2014, 6, 1892-1898.
  15. J. Char, E. Brule ´, P. C. Gros, M.-N. Rager, V. Gue ´rineau and C. M. Thomas, J. Organomet. Chem., 2015, 796, 47-52.
  16. L. Wang, S.-C. Ros -ca, V. Poirier, S. Sinbandhit, V. Dorcet, T. Roisnel, J.-F. Carpentier and Y. Sarazin, Dalton Trans., 2014, 43, 4268-4286.
  17. N. Maudoux, T. Roisnel, J.-F. Carpentier and Y. Sarazin, Organome- tallics, 2014, 33, 5740-5748.
  18. H.-Y. Chen, M.-Y. Liu, A. K. Sutar and C.-C. Lin, Inorg. Chem., 2009, 49, 665-674.
  19. A. J. Gaston, Z. Greindl, C. A. Morrison and J. A. Garden, Inorg. Chem., 2021, 60, 2294-2303.
  20. J. Hao, J. Li, C. Cui and H. W. Roesky, Inorg. Chem., 2011, 50, 7453-7459.
  21. W. Gruszka, A. Lykkeberg, G. S. Nichol, M. P. Shaver, A. Buchard and J. A. Garden, Chem. Sci., 2020, 11, 11785-11790.
  22. J. A. Garden, A. J. P. White and C. K. Williams, Dalton Trans., 2017, 46, 2532-2541.
  23. J. Gao, D. Zhu, W. Zhang, G. A. Solan, Y. Ma and W.-H. Sun, Inorg. Chem. Front., 2019, 6, 2619-2652.
  24. S. Gesslbauer, G. Hutchinson, A. J. P. White, J. Bure ´s and C. Romain, ACS Catal., 2021, 11, 4084-4093;
  25. S. Gesslbauer, R. Salvela, Y. Chen, A. J. P. White and C. Romain, ACS Catal., 2019, 9, 7912-7920;
  26. S. Gesslbauer, H. Cheek, A. J. P. White and C. Romain, Dalton Trans., 2018, 47, 10410-10414.
  27. R. Ligny, M. M. Ha ¨nninen, S. M. Guillaume and J.-F. Carpentier, Chem. Commun., 2018, 54, 8024-8031.
  28. A. J. Neel, M. J. Hilton, M. S. Sigman and F. D. Toste, Nature, 2017, 543, 637-646;
  29. K. T. Mahmudov, A. V. Gurbanov, F. I. Guseinov and M. F. C. Guedes da Silva, Coord. Chem. Rev., 2019, 387, 32-46.
  30. J. M. Maier, P. Li, J. Hwang, M. D. Smith and K. D. Shimizu, J. Am. Chem. Soc., 2015, 137, 8014-8017.
  31. D. J. Liston, Y. J. Lee, W. R. Scheidt and C. A. Reed, J. Am. Chem. Soc., 1989, 111, 6643-6648.
  32. H. Chen, P. S. White and M. R. Gagne ´, Organometallics, 1998, 17, 5358-5366;
  33. R. K. Gurung, C. D. McMillen, W. L. Jarrett and A. A. Holder, Inorg. Chim. Acta, 2020, 505, 119496.
  34. J. Cheng, K. Wei, X. Ma, X. Zhou and H. Xiang, J. Phys. Chem. C, 2013, 117, 16552-16563;
  35. K. Y. Hwang, H. Kim, Y. S. Lee, M. H. Lee and Y. Do, Chem. -Eur. J., 2009, 15, 6478-6487.
  36. M. Nayak, S. Sarkar, S. Hazra, H. A. Sparkes, J. A. K. Howard and S. Mohanta, CrystEngComm, 2011, 13, 124-132;
  37. A. Biswas, S. Mondal, L. Mandal, A. Jana, P. Chakraborty and S. Mohanta, Inorg. Chim. Acta, 2014, 414, 199-209;
  38. N. S -enyu ¨z, B. Yılmaz, H. Batı, E. Bozkurt and O. Bu ¨yu ¨kgu ¨ngo ¨r, Spectrochim. Acta, Part A, 2013, 101, 167-171.
  39. Y. Yamamoto, J. Org. Chem., 2008, 73, 5210;
  40. K. Maeda, T. Takahashi, R. Tomifuji, N. Hirao, T. Kurahashi and S. Matsubara, Chem. Lett., 2018, 47, 532-535.
  41. G. W. Coates and Y. D. Y. L. Getzler, Nat. Rev. Mater., 2020, 5, 501-516.

Cited by

Sorted by citations

Related

Authors
Baker, C. A., Romain, C., & Long, N. J.
Affiliations
Imperial College London (GB)
Corresponding author
  • Romain, Charles
  • Long, Nicholas J.
ORCID
Venue
Chemical Communications
Publisher
Royal Society of Chemistry (RSC)
Published
2021
Volume
57
Issue
93
Pages
12524-12527
ISSN
  • 1359-7345 (ISSN-L)
  • 1364-548X
DOI
10.1039/d1cc05083d
OpenAlex
W3208531902
Cited by
8
References
45
Citations by year
2025: 3 · 2024: 1 · 2022: 4
FWCI
0.33
Type
journal article
Language
en
Open access
Licence
Locations
  • Chemical Communications (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Topics
  • Physical Sciences › Materials Science › Biomaterials › biodegradable polymer synthesis and properties
  • Physical Sciences › Chemistry › Organic Chemistry › Organometallic Complex Synthesis and Catalysis
  • Physical Sciences › Chemical Engineering › Process Chemistry and Technology › Carbon dioxide utilization in catalysis
Keywords
cation-π interactions, heterobimetallic catalysis, silver triflate, polycaprolactone, polymerization mechanism, room-temperature catalysis

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review