Aluminum and Titanium Complexes Bearing 2,6-Bis(2-hydroxyphenyl)pyridines for Ring-Opening Polymerization of Lactide, ε-Caprolactone and their Copolymerization: Effect of a Ligand on Coordination Chemistry and Reactivity

Aluminum and Titanium Complexes Bearing 2,6-Bis(2-hydroxyphenyl)pyridines for Ring-Opening Polymerization of Lactide, ε-Caprolactone and their Copolymerization: Effect of a Ligand on Coordination Chemistry and Reactivity Научная публикация

Журнал

Journal of Organometallic Chemistry
ISSN: 1872-8561 , E-ISSN: 0022-328X

Вых. Данные

Год: 2024, Том: 1005, Номер статьи : 122973, Страниц : DOI: 10.1016/j.jorganchem.2023.122973

Авторы

Mankaev Badma N. ^1,2 , Serova Valeriia A. ^1,2 , Agaeva Milana U. ^1,2 , Lyssenko Konstantin A. ¹ , Fakhrutdinov Artem N. ² , Churakov Andrei V. ³ , Chernikova Elena V. ¹ , Egorov Mikhail P. ² , Karlov Sergey S. ^1,2

Организации

1	Chemistry Department, Lomonosov Moscow State University, 119991 Moscow, Russia
2	N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia
3	Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia

In ring-opening polymerization (ROP) of cyclic esters, the rational design of the catalyst is generally applied to solve the task of providing polyester biocompatibility (non-toxicity) and the problem of copolymer homogeneity when using comonomers of different nature (e. g. lactones and lactides). In the present work, we report the synthesis of aluminum and titanium complexes, based on substituted 2,6-bis(2-hydroxyphenyl)pyridine pro-ligands 1 and 2. It was found that the structure of the pro-ligand drastically affect the structure of the reaction product. Pro-ligand 2 with a bulky tert‑butyl group leads to the monomeric complexes 6 (LAlMe) and 7 (LTi(OiPr)2), while the ligands with less bulky groups lead to the oligomeric Al-containing compounds 3 and 4, and in the case of Ti bis-ligand complex 5 is formed. Complexes 6 (in presence of BnOH) and 7 turned out to be active in the ROP of ε-caprolactone and l-lactide and gave PCL and PLA with high molecular masses. Compound 6 was an effective initiator of copolymerization of ε-caprolactone and l-lactide which led to statistical copolymer poly(LA-stat-CL) with comonomer subunits ratio of 1:1.

Mankaev B.N. , Serova V.A. , Agaeva M.U. , Lyssenko K.A. , Fakhrutdinov A.N. , Churakov A.V. , Chernikova E.V. , Egorov M.P. , Karlov S.S.
Aluminum and Titanium Complexes Bearing 2,6-Bis(2-hydroxyphenyl)pyridines for Ring-Opening Polymerization of Lactide, ε-Caprolactone and their Copolymerization: Effect of a Ligand on Coordination Chemistry and Reactivity
Journal of Organometallic Chemistry. 2024. V.1005. 122973 . DOI: 10.1016/j.jorganchem.2023.122973 WOS Scopus OpenAlex

Web of science:	WOS:001138729800001
Scopus:	2-s2.0-85179895924
OpenAlex:	W4389670521

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