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所属单位：材料科学与技术学院

发表刊物：JOURNAL OF ORGANOMETALLIC CHEMISTRY

关键字：Schiff-base monophenol Homoleptic lanthanide complexes epsilon-caprolactone Ring-opening polymerization

摘要：A series of homoleptic lanthanide complexes [(L1-6)(3)Ln] (Ln = La, L(1)1, L-2 3, L-3 5, L-4 7, L-5 9, L-6 11; Ln = Gd, L-1 2, L-2 4, L-3 6, L-4 8, L-5 10, L-6 12) supported by Schiff-base ligands were synthesized by the amine elimination reactions of monophenol ligands [2,4-Bu-t(2)-6-CH = N-C6H4-p-CH3-PhOH (HL1), 2,4-Bu-t(2)-6-CH = N-C6H4-o-CH3-PhOH (HL2), 2,4-Bu-t(2)-6-CH = N-C6H4-o-C2H5-PhOH (HL3), 2,4-Bu-t(2)-6-CH = N-C6H4-pOCH(3)-PhOH (HL4), 2,4-Bu-t(2)-6-CH = N-C6H4-p-Br-PhOH (HL5), 2,4-Bu-t(2)-6-CH = N-Cy-PhOH (HL6)] with Ln [N(SiMe3)(2)](3) (Ln = La, Gd) in 3: 1 M ration in THF. Complexes 1, 3, 5, 7, 9 and 11 were characterized by NMR spectra and all twelve complexes were characterized using elemental analysis and infrared spectra. Complexes 4, 5 and 6 have been determined by single-crystal X-ray diffraction, which reveals that they have possessed isostructural unsolvated mononuclear structures and the metal center has exhibited a distorted octahedral geometry, in which the O(1), O(2), O(3) atoms have occupied three positions and N(1), N(2), N(3) atoms have occupied the other three positions. The catalytic properties of complexes 1 -12 for the ring-opening polymerization of e-caprolactone were studied and found that all complexes were efficient initiators for this ring-opening polymerization reaction that afforded polycaprolactone with high molecular weights and moderate molecular-weight distributions (1.23-2.46). (c) 2017 Elsevier B.V. All rights reserved.

ISSN号：0022-328X

是否译文：否

发表时间：2018-02-15

合写作者：Cen, Bo,Duan, Ying-Xiang,Deng, Le-Qing,Wang, Yu-Long,Tao, Xian

通讯作者：Tao, Xian,沈应中,沈应中