Water-Soluble Salicylaldiminato Ni(II)−Methyl Complexes: Enhanced Dissociative Activation for Ethylene Polymerization with Unprecedented Nanoparticle Formation | Zendy

Inigo GöttkerSchnetmann | Zendy; Brigitte Korthals | Zendy; Stefan Mecking | Zendy

Open Access

Water-Soluble Salicylaldiminato Ni(II)−Methyl Complexes: Enhanced Dissociative Activation for Ethylene Polymerization with Unprecedented Nanoparticle Formation

Author(s) -

Inigo GöttkerSchnetmann,

Brigitte Korthals,

Stefan Mecking

Publication year - 2006

Publication title -

journal of the american chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 7.115

H-Index - 612

eISSN - 1520-5126

pISSN - 0002-7863

DOI - 10.1021/ja0619962

Subject(s) - chemistry , polymerization , aqueous solution , polymer chemistry , tppts , dissociation (chemistry) , amphiphile , photochemistry , solvation , ethylene , catalysis , solvent , copolymer , organic chemistry , polymer , rhodium , hydroformylation

Water-soluble single-component (kappa2-N,O)-salicylaldiminato nickel-methyl complexes 1-4-L (L = TPPTS, TPPDS, H2N-PEG-OMe) allow for the catalytic polymerization of ethylene under organic solvent-free aqueous conditions producing high molecular weight polyethylene with particle sizes below 10 nm. Amphiphilic TPPDS- and H2N-PEG-OMe complexes exhibit a polymerization activity in water higher than that in toluene. A solvation-favored activation of precatalysts 1-4-L by equilibrium dissociation of L in aqueous solution likely accounts for this enhanced polymerization activity. The observed generation of a given particle by a single active site is an unprecedented mechanism for formation of aqueous particle dispersions.

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