Influence of lactic acid on the catalytic performance of MDABCO for ring-opening polymerization of L-lactide

Abstract

A series of metal organic frameworks (MOFs) MDABCO (M = Co, Ni, Cu, Zn; DABCO = 1,4-diazabicyclo[2.2.2]octane) are utilized as catalysts for the bulk ring-opening polymerization of L-lactide. The catalytic activity varies in the order CuDABCO, NiDABCO < ZnDABCO, CoDABCO. By adding lactic acid, we unexpectedly observed enhanced catalytic activity. The combined use of lactic acid and ZnDABCO during polymerization results in a highly active polymerization system, along with the gradual change of MOFs structure caused by an increased acid concentration. Compared to related homogeneous fragments, such as zinc nitrate and 1,4-diazabicyclo[2.2.2]octane, ZnDABCO is found to afford highly isotactic polylactide, which would be ascribed to the unique structural properties of MOFs.

Original language	English
Pages (from-to)	15-21
Number of pages	7
Journal	Applied Catalysis A: General
Volume	546
DOIs	https://doi.org/10.1016/j.apcata.2017.08.007
Publication status	Published - 25 Sep 2017

Keywords

Heterogeneous catalysis
Lactic acid
MDABCO MOFs
Polylactide
Ring-opening polymerization

ASJC Scopus subject areas

Catalysis
Process Chemistry and Technology

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@article{e2f9a87e3da74f728db6efe717bdb333,

title = "Influence of lactic acid on the catalytic performance of MDABCO for ring-opening polymerization of L-lactide",

abstract = "A series of metal organic frameworks (MOFs) MDABCO (M = Co, Ni, Cu, Zn; DABCO = 1,4-diazabicyclo[2.2.2]octane) are utilized as catalysts for the bulk ring-opening polymerization of L-lactide. The catalytic activity varies in the order CuDABCO, NiDABCO < ZnDABCO, CoDABCO. By adding lactic acid, we unexpectedly observed enhanced catalytic activity. The combined use of lactic acid and ZnDABCO during polymerization results in a highly active polymerization system, along with the gradual change of MOFs structure caused by an increased acid concentration. Compared to related homogeneous fragments, such as zinc nitrate and 1,4-diazabicyclo[2.2.2]octane, ZnDABCO is found to afford highly isotactic polylactide, which would be ascribed to the unique structural properties of MOFs.",

keywords = "Heterogeneous catalysis, Lactic acid, MDABCO MOFs, Polylactide, Ring-opening polymerization",

author = "Zhixiong Luo and Somboon Chaemchuen and Kui Zhou and Gonzalez, {Andres Alvarado} and Francis Verpoort",

year = "2017",

month = sep,

day = "25",

doi = "10.1016/j.apcata.2017.08.007",

language = "English",

volume = "546",

pages = "15--21",

journal = "Applied Catalysis A: General",

issn = "0926-860X",

publisher = "Elsevier",

}

TY - JOUR

T1 - Influence of lactic acid on the catalytic performance of MDABCO for ring-opening polymerization of L-lactide

AU - Luo, Zhixiong

AU - Chaemchuen, Somboon

AU - Zhou, Kui

AU - Gonzalez, Andres Alvarado

AU - Verpoort, Francis

PY - 2017/9/25

Y1 - 2017/9/25

N2 - A series of metal organic frameworks (MOFs) MDABCO (M = Co, Ni, Cu, Zn; DABCO = 1,4-diazabicyclo[2.2.2]octane) are utilized as catalysts for the bulk ring-opening polymerization of L-lactide. The catalytic activity varies in the order CuDABCO, NiDABCO < ZnDABCO, CoDABCO. By adding lactic acid, we unexpectedly observed enhanced catalytic activity. The combined use of lactic acid and ZnDABCO during polymerization results in a highly active polymerization system, along with the gradual change of MOFs structure caused by an increased acid concentration. Compared to related homogeneous fragments, such as zinc nitrate and 1,4-diazabicyclo[2.2.2]octane, ZnDABCO is found to afford highly isotactic polylactide, which would be ascribed to the unique structural properties of MOFs.

AB - A series of metal organic frameworks (MOFs) MDABCO (M = Co, Ni, Cu, Zn; DABCO = 1,4-diazabicyclo[2.2.2]octane) are utilized as catalysts for the bulk ring-opening polymerization of L-lactide. The catalytic activity varies in the order CuDABCO, NiDABCO < ZnDABCO, CoDABCO. By adding lactic acid, we unexpectedly observed enhanced catalytic activity. The combined use of lactic acid and ZnDABCO during polymerization results in a highly active polymerization system, along with the gradual change of MOFs structure caused by an increased acid concentration. Compared to related homogeneous fragments, such as zinc nitrate and 1,4-diazabicyclo[2.2.2]octane, ZnDABCO is found to afford highly isotactic polylactide, which would be ascribed to the unique structural properties of MOFs.

KW - Heterogeneous catalysis

KW - Lactic acid

KW - MDABCO MOFs

KW - Polylactide

KW - Ring-opening polymerization

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DO - 10.1016/j.apcata.2017.08.007

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