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Ring‐opening polymerization of trimethylenecarbonate by the bridged diphenoxo ytterbium (II) complex
Author(s) -
Zhao B.,
Hu X. L.,
Lu C. R.
Publication year - 2011
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.33434
Subject(s) - ytterbium , tetrahydrofuran , polymerization , ring opening polymerization , denticity , chemistry , ring (chemistry) , ligand (biochemistry) , polymer chemistry , yield (engineering) , copolymer , proton nmr , medicinal chemistry , stereochemistry , crystallography , materials science , organic chemistry , polymer , crystal structure , biochemistry , receptor , optoelectronics , doping , solvent , metallurgy
A novel ytterbium (II) complex 2 supporting by a bridged bisphenolate ligand H 2 L OC4H7 (L = C 4 H 7 OCH 2 N(CH 2 ‐2‐OC 6 H 2 ‐3,5‐Bu 2 t ) 2 ) with a tetrahydrofuran donor on side‐arm was synthesized in high yield and characterized by elementary analysis, IR, 1 H‐NMR, and 13 C‐NMR. Ring‐opening polymerization of 1,3‐trimethylenecarbonate (TMC) was carried out using complex 2 and a known complex [Me 2 NCH 2 CH 2 N(CH 2 ‐2‐O‐3,5‐C 6 H 2 (Bu t ) 2 ) 2 ]Yb 1 as the initiators, respectively. It was found that both complexes 1 and 2 can alone initiate the ring‐opening polymerization of TMC, and complex 1 showed higher activity than complex 2 . The activity of both complexes 1 and 2 was found to be higher than that of monodentate phenoxo ytterbium (II) complex (2,6‐Bu 2 t ‐C 6 H 3 O) 2 Yb(THF) 3 . © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
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