TY - JOUR
T1 - Undecyltin trichloride grafted onto cross-linked polystyrene
T2 - An efficient catalyst for ring-opening polymerization of ε-caprolactone
AU - Poelmans, Kevin
AU - Pinoie, Vanja
AU - Verbruggen, Ingrid
AU - Biesemans, Monique
AU - Deshayes, Gaëlle
AU - Duquesne, Emmanuel
AU - Delcourt, Cécile
AU - Degée, Philippe
AU - Miltner, Hans E.
AU - Dubois, Philippe
AU - Willem, Rudolph
PY - 2008/4/28
Y1 - 2008/4/28
N2 - The activity, recyclability, and chemical stability as a catalyst of undecyltin trichloride grafted to cross-linked polystyrene, [P-H] (1-t)[P-(CH2)n-SnCl3]t, with [P-H] the monomelic unit of the nonfunctionalized polymer and t the organotin-functionalized monomer fraction, are assessed in the ring-opening polymerization (ROP) of ε-caprolactone. Quantitative conversion is obtained within 2 h under conditions in which conversion is by far incomplete for two other organotin grafts, [P-H](1-t)[P-(CH2) 11-SnBuCl2]t and [P-H](1-t){[P- (CH2)11-SnBuCl]2O}t/2. Even after 15 min of reaction, conversions of at least 70% are achieved for the grafted tin trichloride. The catalytic reactions of the grafted undecyltin trichloride, more particularly its chemical integrity and recycling ability, are monitored, in situ, at the solid-liquid interface, using high-resolution magic angle spinning (HR-MAS) 1H and 119Sn NMR. Residual tin contents in the reaction products were assessed by inductively coupled plasma/atomic emission spectroscopy (ICP//AES). The polydispersity index of the synthesized poly(ε-caprolactone), investigated with size exclusion chromatography, is closer to unity than for grafted tin dichloride catalysts.
AB - The activity, recyclability, and chemical stability as a catalyst of undecyltin trichloride grafted to cross-linked polystyrene, [P-H] (1-t)[P-(CH2)n-SnCl3]t, with [P-H] the monomelic unit of the nonfunctionalized polymer and t the organotin-functionalized monomer fraction, are assessed in the ring-opening polymerization (ROP) of ε-caprolactone. Quantitative conversion is obtained within 2 h under conditions in which conversion is by far incomplete for two other organotin grafts, [P-H](1-t)[P-(CH2) 11-SnBuCl2]t and [P-H](1-t){[P- (CH2)11-SnBuCl]2O}t/2. Even after 15 min of reaction, conversions of at least 70% are achieved for the grafted tin trichloride. The catalytic reactions of the grafted undecyltin trichloride, more particularly its chemical integrity and recycling ability, are monitored, in situ, at the solid-liquid interface, using high-resolution magic angle spinning (HR-MAS) 1H and 119Sn NMR. Residual tin contents in the reaction products were assessed by inductively coupled plasma/atomic emission spectroscopy (ICP//AES). The polydispersity index of the synthesized poly(ε-caprolactone), investigated with size exclusion chromatography, is closer to unity than for grafted tin dichloride catalysts.
UR - http://www.scopus.com/inward/record.url?scp=43249129167&partnerID=8YFLogxK
U2 - 10.1021/om701172q
DO - 10.1021/om701172q
M3 - Article
AN - SCOPUS:43249129167
SN - 0276-7333
VL - 27
SP - 1841
EP - 1849
JO - Organometallics
JF - Organometallics
IS - 8
ER -