scholarly journals Titanium complexes bearing oxa- and azacalix[4, 6]arenes: structural studies and use in the ring opening homo-/co-polymerization of cyclic esters

2021 ◽  
Vol 50 (12) ◽  
pp. 4396-4407
Author(s):  
Tian Xing ◽  
Timothy J. Prior ◽  
Kai Chen ◽  
Carl Redshaw
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Structural Studies ◽  
Titanium Complexes ◽  
Cyclic Esters

Rare examples of titanium oxa- and aza-calixarenes are reported which are active for the ring opening polymerization (ROP) of ε-caprolactone, δ-valerolactone and rac-lactide.

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.

scholarly journals Use of Titanium Complexes Bearing Diphenolate or Calix[n]arene Ligands in α-Olefin Polymerization and the ROP of Cyclic Esters

Catalysts ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 210 ◽  
Author(s):  
Orlando Santoro ◽  
Carl Redshaw
Keyword(s):  
Ring Opening ◽  
Olefin Polymerization ◽  
Ring Opening Polymerization ◽  
Molecular Structures ◽  
Titanium Complexes ◽  
Cyclic Esters ◽  
Arene Ligands ◽  
Catalytic Behaviour

In this review, we discuss the use of titanium complexes bearing either bridged diphenolate or calix[n]arene (n = 4, 6, 8) ligation, in the formation of plastics from α-olefins or via the ring opening polymerization (ROP) of cyclic esters. The syntheses, molecular structures and catalytic behaviour of these systems are discussed, as well as where possible, the properties of the resultant polymers.

Improvement in titanium complexes supported by Schiff bases in ring-opening polymerization of cyclic esters: ONO-tridentate Schiff bases

Polymer ◽  
2018 ◽  
Vol 140 ◽  
pp. 315-325 ◽  
Author(s):  
Hsiu-Wei Ou ◽  
Wei-Yi Lu ◽  
Jaya Kishore Vandavasi ◽  
Ya-Fan Lin ◽  
Hsuan-Ying Chen ◽  
...  
Keyword(s):  
Schiff Bases ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Titanium Complexes ◽  
Cyclic Esters

Titanium Complexes of Pyrrolylaldiminate Ligands and Their Exploitation for the Ring-Opening Polymerization of Cyclic Esters

2021 ◽  
Author(s):  
Kanokon Upitak ◽  
Worawat Wattanathana ◽  
Tanin Nanok ◽  
Pitak Chuawong ◽  
Pimpa Hormnirun
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Titanium Complexes ◽  
Cyclic Esters ◽  
X Ray

A series of six-coordinate titanium complexes 1−6 supported by pyrrolylaldiminate ligands were prepared via the reaction of 2 equivalent of ligands and Ti(OiPr)4 in toluene at 70 ºC. The X-ray...

A switchable dimeric yttrium complex and its three catalytic states in ring opening polymerization

2021 ◽  
Author(s):  
Shijie Deng ◽  
Paula L. Diaconescu
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Oxidation States ◽  
Cyclic Esters

A dimeric yttrium phenoxide complex can be oxidized in a stepwise fashion to access three oxidation states. The three states show different activity in the ring opening polymerization of cyclic esters and epoxides.

Ring-opening polymerization of lactones by mono(cyclopentadienyl)titanium complexes

1995 ◽  
Vol 95 (1) ◽  
pp. 195-202 ◽  
Author(s):  
Jun Okuda ◽  
Thomas Kleinhenn ◽  
Peter König ◽  
Insa Taden ◽  
Silvana Ngo ◽  
...  
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Titanium Complexes
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