ICCAS OpenIR
Enolic Schiff base aluminum complexes and their catalytic stereoselective polymerization of racemic lactide
Pang, Xuan1,2; Du, Hongzhi1,2; Chen, Xuesi1; Wang, Xianhong1; Jing, Xiabin1
2008
Source PublicationCHEMISTRY-A EUROPEAN JOURNAL
ISSN0947-6539
Volume14Issue:10Pages:3126-3136
AbstractA series of enolic Schiff base aluminum(III) complexes LAIR (where L = NNOO-tetradentate enolic Schiff base ligand) containing ligands that differ in their steric and electronic properties were synthesized. Their single crystals showed that these complexes are five -coordinated around the aluminum center. Their coordination geometries are between square pyramidal and trigonal bipyramidal. Their catalytic properties in the solution polymerization of racemic lactide (rac-LA) were examined. The modifications in the auxiliary ligand exhibited a dramatic influence on the catalytic performance. Lengthening the backbone from C(2) alkylene to C(3) alkylene resulted in remarkable enhancement of both the stereoselectivity and the polymerization rate because of the increasing flexibility of the diimine backbone. Electron-withdrawing substituents in the diketone also highly improved the activity and the stereoselectivity. Among these complexes, 4b had the highest activity and the stereoselectivity owing to the C(3) alkylene backbone and the two gem-methyl groups on the middle carbon atom. The value of the polymerization rate constant (k(p)) catalyzed by 4b in 70 degrees C was 1.90 L mol(-1) min(-1), the activation energy of the polymerization (35.4 kJ mol(-1)) was calculated according to the Arrhenius equation. Other factors that influenced the polymerization, such as the polymerization time, the temperature, and the monomer concentration, are also discussed in detail.
KeywordAluminum Lactide Ring-opening Polymerization Schiff Bases Stereoselectivity
DOI10.1002/chem.200701473
Indexed BySCI ; IC
Language英语
WOS IDWOS:000254872600020
PublisherWILEY-BLACKWELL
Citation statistics
Cited Times:111[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/63996
Collection中国科学院化学研究所
Corresponding AuthorChen, Xuesi
Affiliation1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
Recommended Citation
GB/T 7714
Pang, Xuan,Du, Hongzhi,Chen, Xuesi,et al. Enolic Schiff base aluminum complexes and their catalytic stereoselective polymerization of racemic lactide[J]. CHEMISTRY-A EUROPEAN JOURNAL,2008,14(10):3126-3136.
APA Pang, Xuan,Du, Hongzhi,Chen, Xuesi,Wang, Xianhong,&Jing, Xiabin.(2008).Enolic Schiff base aluminum complexes and their catalytic stereoselective polymerization of racemic lactide.CHEMISTRY-A EUROPEAN JOURNAL,14(10),3126-3136.
MLA Pang, Xuan,et al."Enolic Schiff base aluminum complexes and their catalytic stereoselective polymerization of racemic lactide".CHEMISTRY-A EUROPEAN JOURNAL 14.10(2008):3126-3136.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Pang, Xuan]'s Articles
[Du, Hongzhi]'s Articles
[Chen, Xuesi]'s Articles
Baidu academic
Similar articles in Baidu academic
[Pang, Xuan]'s Articles
[Du, Hongzhi]'s Articles
[Chen, Xuesi]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Pang, Xuan]'s Articles
[Du, Hongzhi]'s Articles
[Chen, Xuesi]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.