The DOI matches its Crossref record; 3 of the 3 references it cites were found in a registry or an index.
Kinetics and Mechanism of l-Lactide Polymerization by Rare Earth Metal Silylamido Complexes: Effect of Alcohol Addition
Abstract
The ring-opening polymerization of l -lactide initiated by rare earth metal silylamido complexes [Ln(OSSO){N(SiHMe 2 ) 2 }(THF)] ( 1 − 3: Ln = Y, Lu; OSSO = 1, ω-dithiaalkanediyl-bridged bisphenolato) was studied. MALDI-TOF mass spectrometry and 1 H NMR spectroscopy suggested that the polymerization proceeded via a conventional coordination−insertion mechanism involving silylamide ligand as the initiating group and the cleavage of acyl−oxygen bond of the monomer. A two-stage linear relationship between ln([LA] 0 /[LA] t ) and the polymerization time was observed for the yttrium complex [Y(pdtbp){N(SiHMe 2 ) 2 }(THF)] (pdtbp = 1,5-dithiapentanediyl-bis{4,6-di- tert -butylphenolato}, 3 ). In both stages, the polymerization showed first-order kinetics for the monomer concentration. The first-order dependency of the initiator concentration was only observed when the monomer conversion to PLA was less than 50−60%. The aggregation of the active growing polymer chain into dimeric structure occurred in the second stage. In contrast, the in situ generated alkoxide initiator [Ln(OSSO){N(SiHMe 2 ) 2 }(THF)]/ i PrOH showed a different behavior. When 3 was reacted with 2-propanol in 1:2 ratio, the in situ generated alkoxides initiated the living polymerization of l -lactide. Neither aggregation nor intramolecular transesterification was observed over the entire conversion range. Polylactides with controlled molecular parameters ( M n, end groups) and low polydispersities were formed as a result of fast alkoxide/alcohol exchange.
Overview
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.
Integrity signals
Registry
Cites
Statistics
Verification
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.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
Polymerization of Lactide with Zinc and Magnesium β-Diiminate Complexes: Stereocontrol and Mechanism
Chamberlain, B. M., Cheng, M., Moore, D. R., Ovitt, T. M., Lobkovsky, E. B., & Coates, G. W. (2001) · Journal of the American Chemical Society · doi:10.1021/ja003851f · Cited by 1,207
O'Keefe, B. J., Breyfogle, L. E., Hillmyer, M. A., & Tolman, W. B. (2002) · Journal of the American Chemical Society · doi:10.1021/ja012689t · Cited by 297
Martin, E., Dubois, P., & Jérôme, R. (2000) · Macromolecules · doi:10.1021/ma991045r · Cited by 144
Cited by
Biocompatible Initiators for Lactide Polymerization
Platel, R., Hodgson, L., & Williams, C. (2008) · Polymer Reviews · doi:10.1080/15583720701834166 · Cited by 706
Hong, M., & Chen, E. Y.-X. (2016) · Nature Chemistry · doi:10.1038/nchem.2391 · Cited by 677
Metal-catalyzed immortal ring-opening polymerization of lactones, lactides and cyclic carbonates
Ajellal, N., Carpentier, J.-F., Guillaume, C., Guillaume, S. M., Helou, M., Poirier, V., Sarazin, Y., & Trifonov, A. (2010) · Dalton Transactions · doi:10.1039/c001226b · Cited by 494
Bouyahyi, M., Ajellal, N., Kirillov, E., Thomas, C. M., & Carpentier, J. (2011) · Chemistry – A European Journal · doi:10.1002/chem.201002779 · Cited by 217
Why Is Crystalline Poly(lactic acid) Brittle at Room Temperature?
Razavi, M., & Wang, S.-Q. (2019) · Macromolecules · doi:10.1021/acs.macromol.9b00595 · Cited by 212
Amgoune, A., Thomas, C. M., & Carpentier, J. (2007) · Macromolecular Rapid Communications · doi:10.1002/marc.200600862 · Cited by 195
Tang, X., Hong, M., Falivene, L., Caporaso, L., Cavallo, L., & Chen, E. Y.-X. (2016) · Journal of the American Chemical Society · doi:10.1021/jacs.6b07974 · Cited by 179
Dyer, H. E., Huijser, S., Susperregui, N., Bonnet, F., Schwarz, A. D., Duchateau, R., Maron, L., & Mountford, P. (2010) · Organometallics · doi:10.1021/om100513j · Cited by 158
Huang, B.-H., Tsai, C.-Y., Chen, C.-T., & Ko, B.-T. (2016) · Dalton Transactions · doi:10.1039/c6dt03384a · Cited by 75
Guerin, W., Helou, M., Carpentier, J.-F., Slawinski, M., Brusson, J.-M., & Guillaume, S. M. (2013) · Polym. Chem. · doi:10.1039/c2py20859h · Cited by 75
Li, L., Liu, B., Liu, D., Wu, C., Li, S., Liu, B., & Cui, D. (2014) · Organometallics · doi:10.1021/om5008264 · Cited by 70
Fang, J., Yu, I., Mehrkhodavandi, P., & Maron, L. (2013) · Organometallics · doi:10.1021/om400399k · Cited by 59
Ling, J., Shen, J., & Hogen-Esch, T. E. (2009) · Polymer · doi:10.1016/j.polymer.2009.06.006 · Cited by 58
Wang, H., Yang, Y., & Ma, H. (2016) · Inorganic Chemistry · doi:10.1021/acs.inorgchem.6b00378 · Cited by 50
Self-citationIn Situ Versus Isolated Zinc Catalysts in the Selective Synthesis of Homo and Multi-block Polyesters
Gruszka, W., Walker, L. C., Shaver, M. P., & Garden, J. A. (2020) · Macromolecules · doi:10.1021/acs.macromol.0c00277 · Cited by 49
Pappuru, S., Chokkapu, E. R., Chakraborty, D., & Ramkumar, V. (2013) · Dalton Transactions · doi:10.1039/c3dt52065j · Cited by 47
Sattayanon, C., Sontising, W., Jitonnom, J., Meepowpan, P., Punyodom, W., & Kungwan, N. (2014) · Computational and Theoretical Chemistry · doi:10.1016/j.comptc.2014.06.008 · Cited by 36
Roymuhury, S. K., Chakraborty, D., & Ramkumar, V. (2015) · Dalton Transactions · doi:10.1039/c5dt01092f · Cited by 34
Chakraborty, D., Mandal, D., Ramkumar, V., Subramanian, V., & Vijaya Sundar, J. (2015) · Polymer · doi:10.1016/j.polymer.2014.10.074 · Cited by 33
Zhao, W., Wang, Y., Liu, X., & Cui, D. (2012) · Chemical Communications · doi:10.1039/c2cc31122d · Cited by 32
Stephen, R., Sunoj, R. B., & Ghosh, P. (2011) · Dalton Transactions · doi:10.1039/c1dt10345h · Cited by 23
Kosuru, S. R., Lai, F.-J., Chang, Y.-L., Li, C.-Y., Lai, Y.-C., Ding, S., Wu, K.-H., Chen, H.-Y., & Lo, Y.-H. (2021) · Inorganic Chemistry · doi:10.1021/acs.inorgchem.1c01192 · Cited by 20
Tin (IV) alkoxide initiator design for poly (d-lactide) synthesis using DFT calculations
Lawan, N., Muangpil, S., Kungwan, N., Meepowpan, P., Lee, V. S., & Punyodom, W. (2013) · Computational and Theoretical Chemistry · doi:10.1016/j.comptc.2013.07.045 · Cited by 15
Metadata
- Authors
- Ma, H., & Okuda, J.
- Venue
- Macromolecules
- Publisher
- American Chemical Society (ACS)
- Published
- 2005-03-05
- Volume
- 38
- Issue
- 7
- Pages
- 2665-2673
- ISSN
- 0024-9297 (ISSN-L)
- 1520-5835
- OpenAlex
- W2080646078
- Cited by
- 269
- References
- 3
- FWCI
- 7.83
- Type
- journal article
- Language
- en
- Open access
- closed
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
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
