Cationic indium catalysts for ring opening polymerization: tuning reactivity with hemilabile ligands
作者： Chatura Goonesinghe , Hootan Roshandel , Carlos Diaz , Hyuk-Joon Jung , Kudzanai Nyamayaro
DOI: 10.1039/D0SC01291B
关键词: Alkyl 、 Lactide 、 Cationic polymerization 、 Polymerization 、 Ring-opening polymerization 、 Reactivity (chemistry) 、 Indium 、 Polymer chemistry 、 Catalysis 、 Chemistry
摘要: This is a comprehensive study of the effects rationally designed hemilabile ligands on stability, reactivity, and change in catalytic behavior indium complexes. We report cationic alkyl complexes supported by family hemi-salen type bearing thiophenyl (2a), furfuryl (2b) pyridyl (2c) pendant donor arms. Shelf-life stability these followed trend 2a 2b > 2c with control polymerization following an inverse relationship to reactivity. Surprisingly, polymerized racemic lactide without external initiator, likely through alkyl-initiated coordination-insertion mechanism.
rsc.org
sci-hub.se 参考文章(55)
Krzysztof Matyjaszewski, Stanisław Penczek, Ion‐trapping in cationic polymerization, 2. Relative rates of trapping and relative chemical shifts for structurally differing phosphines as trapping agents Macromolecular Chemistry and Physics. ,vol. 182, pp. 1735- 1742 ,(1981) , 10.1002/MACP.1981.021820614
D. C. Aluthge, J. M. Ahn, P. Mehrkhodavandi, Overcoming aggregation in indium salen catalysts for isoselective lactide polymerization Chemical Science. ,vol. 6, pp. 5284- 5292 ,(2015) , 10.1039/C5SC01584G
I. Yu, T. Ebrahimi, S. G. Hatzikiriakos, P. Mehrkhodavandi, Star-shaped PHB-PLA block copolymers: immortal polymerization with dinuclear indium catalysts. Dalton Transactions. ,vol. 44, pp. 14248- 14254 ,(2015) , 10.1039/C5DT02357B
Cuiling Xu, Insun Yu, Parisa Mehrkhodavandi, Highly controlled immortal polymerization of β-butyrolactone by a dinuclear indium catalyst. Chemical Communications. ,vol. 48, pp. 6806- 6808 ,(2012) , 10.1039/C2CC33114D
Insun Yu, Ian R. Duffy, Paraskevi O. Lagaditis, Joey C.-C. Yu, Christopher J. Wallis, Parisa Mehrkhodavandi, Kimberly M. Osten, Effects of ligand tuning on dinuclear indium catalysts for lactide polymerization Dalton Transactions. ,vol. 41, pp. 8123- 8134 ,(2012) , 10.1039/C2DT30148B
K. M. Osten, D. C. Aluthge, P. Mehrkhodavandi, The effect of steric changes on the isoselectivity of dinuclear indium catalysts for lactide polymerization. Dalton Transactions. ,vol. 44, pp. 6126- 6139 ,(2015) , 10.1039/C5DT00222B
Mari S. Rosen, Charlotte L. Stern, Chad A. Mirkin, Heteroligated PtII Weak-Link Approach complexes using hemilabile N-heterocyclic carbene–thioether and phosphino–thioether ligands Chemical Science. ,vol. 4, pp. 4193- 4198 ,(2013) , 10.1039/C3SC51557E
Gregory C. Welch, Lourdes Cabrera, Preston A. Chase, Emily Hollink, Jason D. Masuda, Pingrong Wei, Douglas W. Stephan, Tuning Lewis acidity using the reactivity of “frustrated Lewis pairs”: facile formation of phosphine-boranes and cationic phosphonium-boranes Dalton Transactions. pp. 3407- 3414 ,(2007) , 10.1039/B704417H
Samuel Dagorne, Mickael Normand, Evgeny Kirillov, Jean-François Carpentier, Gallium and indium complexes for ring-opening polymerization of cyclic ethers, esters and carbonates Coordination Chemistry Reviews. ,vol. 257, pp. 1869- 1886 ,(2013) , 10.1016/J.CCR.2013.02.012
Jean-Thomas Issenhuth, Julien Pluvinage, Richard Welter, Stéphane Bellemin-Laponnaz, Samuel Dagorne, Novel Neutral and Cationic Aluminium Alkyl Complexes Supported by Potentially Tridentate O,N,L‐Type Aminophenolate Ligands and Their Use in Propylene Oxide Polymerization European Journal of Inorganic Chemistry. ,vol. 2009, pp. 4701- 4709 ,(2009) , 10.1002/EJIC.200900703