Synthesis, characterization of carbon-bridged Bis(phenolate) neodymium complexes and their catalytic activity for ring-opening polymerization of cyclic esters

2011 ◽  
Vol 14 (12) ◽  
pp. 1948-1951 ◽  
Author(s):  
Zhenhua Liang ◽  
Xufeng Ni ◽  
Xue Li ◽  
Zhiquan Shen
Keyword(s):  
Catalytic Activity ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Cyclic Esters

scholarly journals INSIGHTS into the structures adopted by titanocalix[6 and 8]arenes and their use in the ring opening polymerization of cyclic esters

2020 ◽  
Vol 49 (34) ◽  
pp. 11978-11996
Author(s):  
Orlando Santoro ◽  
Mark R. J. Elsegood ◽  
Elizabeth V. Bedwell ◽  
Jake A. Pryce ◽  
Carl Redshaw
Keyword(s):  
Catalytic Activity ◽  
Ring Opening ◽  
Structural Features ◽  
Ring Opening Polymerization ◽  
Cyclic Esters

Interaction of p-tert-butylcalix[n]arenes (n = 6, 8) with [TiX4] (X = F, Cl, Br, I) afforded 11 novel compounds with interesting structural features. The catalytic activity of these species in the ROP of cyclic esters was tested.

scholarly journals Lithium calix[4]arenes: structural studies and use in the ring opening polymerization of cyclic esters

RSC Advances ◽  
2021 ◽  
Vol 11 (19) ◽  
pp. 11304-11317
Author(s):  
Orlando Santoro ◽  
Mark R. J. Elsegood ◽  
Simon J. Teat ◽  
Takehiko Yamato ◽  
Carl Redshaw
Keyword(s):  
Catalytic Activity ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Structural Studies ◽  
Arene Complexes ◽  
Cyclic Esters

Novel Li-calix[n]arene complexes (n = 3, 4) having (–S–), (–SO–), (–SO2–), (–CH2OCH2–) or (–CH2–) bridges have been synthesized and fully characterized. Their catalytic activity in the ring opening polymerization of lactones has been studied.

Recent progress in the application of group 1, 2 & 13 metal complexes as catalysts for the ring opening polymerization of cyclic esters

2019 ◽  
Vol 6 (10) ◽  
pp. 2619-2652 ◽  
Author(s):  
Jiahao Gao ◽  
Dongzhi Zhu ◽  
Wenjuan Zhang ◽  
Gregory A. Solan ◽  
Yanping Ma ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Ring Opening ◽  
Recent Progress ◽  
Ring Opening Polymerization ◽  
Aliphatic Polyesters ◽  
Cyclic Esters ◽  
Factors Influencing ◽  
Polymer Properties ◽  
Recent Developments ◽  
Group 1

This review focuses on recent developments concerned with the use of well-defined main group complexes as (pre-)catalysts for the ROP of cyclic esters to give aliphatic polyesters; factors influencing catalytic activity, selectivity and polymer properties are all discussed.

scholarly journals Synthesis and characterization of Metal-mercaptoacetate hybrids and its application towards ring opening polymerization of ε-caprolactone: A comparative study

2021 ◽  
Author(s):  
L. Kannammal ◽  
B. Meeenarathi ◽  
V. Parthasarathy ◽  
Ramasamy Anbarasan
Keyword(s):  
Catalytic Activity ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Linear Increase ◽  
Nmr Spectrum ◽  
Degradation Temperature ◽  
Ft Ir ◽  
Uv Visible ◽  
Ft Ir Spectroscopy

Abstract The Mn2+ and Mo6+ based Metal-mercaptoacetate (Metal-MA) hybrids were prepared by a simple acid-base titration method. The prepared Metal-MA hybrids were analysed by FT-IR spectroscopy, UV-visible spectroscopy, SEM, particle size analyser (PSA), XRD and EDX. The prepared Metal-MA hybrids were investigated to assess their catalytic activity for ring-opening polymerization (ROP) of ε-caprolactone (CL) in the absence of an initiator at 160 oC in N2 atmosphere by varying the catalyst concentration and temperature. The catalytic activity of the Metal-MA hybrid towards the ROP of CL was concluded by the FTIR-RI method. The % yield, degradation temperature (Td), melting temperature (Tm) and molecular weight (Mw) of poly(ε-caprolactone) (PCL) were also investigated. The structure of PCL was comprehended by analysing its NMR spectrum. The activation energy (Ea) for the ROP of CL was determined as 10,363 Kcal/mol. A linear increase in Mw of PCL with the increasing [M0/I0] ratio was also noticed.

scholarly journals Investigation of redox switchable titanium and zirconium catalysts for the ring opening polymerization of cyclic esters and epoxides

2017 ◽  
Vol 4 (11) ◽  
pp. 1798-1805 ◽  
Author(s):  
Miranda Y. Lowe ◽  
Sisheng Shu ◽  
Stephanie M. Quan ◽  
Paula L. Diaconescu
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Synthesis And Characterization ◽  
Cyclic Esters ◽  
Zirconium Catalysts

The synthesis and characterization of (thiolfan*)Zr(OtBu)2 (thiolfan* = 1,1′-di(2,4-di-tert-butyl-6-thiophenoxide)ferrocene) is reported, as well as its activity toward the ring-opening polymerizations of l-lactide and ε-caprolactone.

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