title: Iso-selective ring-opening polymerization of rac-lactide catalyzed by crown ether complexes of sodium and potassium naphthalenolates.
abstract: Two crown ether complexes of sodium and potassium naphthalenolates were synthesized and entirely characterized. The two complexes can iso-selectively catalyze the ring-opening polymerization (ROP) of rac-lactide at room temperature and afford polylactides with desired molecular weights and narrow PDIs; the best isotacticity (Pm) achieved was 0.73.
authors.affiliation: Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University , Lanzhou 730000, People's Republic of China.
authors.forename: Jiao
authors.initials: J
authors.lastname: Xiong
authors.forename: Jinjin
authors.initials: J
authors.lastname: Zhang
authors.forename: Yangyang
authors.initials: Y
authors.lastname: Sun
authors.forename: Zhongran
authors.initials: Z
authors.lastname: Dai
authors.forename: Xiaobo
authors.initials: X
authors.lastname: Pan
authors.forename: Jincai
authors.initials: J
authors.lastname: Wu
mesh_terms: D002384:Catalysis; D056831:Coordination Complexes / Q000138:chemical synthesis / Q000737:chemistry*; D043844:Crown Ethers / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D009281:Naphthalenes / Q000737:chemistry*; D011091:Polyesters / Q000138:chemical synthesis* / Q000737:chemistry; D058105:Polymerization; D011188:Potassium / Q000737:chemistry*; D012964:Sodium / Q000737:chemistry*
chemical_list: D056831:Coordination Complexes; D043844:Crown Ethers; D009281:Naphthalenes; D011091:Polyesters; C033616:poly(lactide); D012964:Sodium; D011188:Potassium