期刊
POLYHEDRON
卷 141, 期 -, 页码 191-197出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.poly.2017.11.043
关键词
Titanium complex; Tridentate ligand; X-ray structure; Carbon dioxide; Cyclic propylene carbonate
资金
- National Research Foundation of Korea (NRF) - Ministry of the Science, ICT & Future Planning and education [2015R1A4A1041036, 2016 R1D1A1B03930507]
- Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Ministry of Trade, Industry and Energy (MOTIE) of the Republic of Korea [20172010202000]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20172010202000] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
New titanium complexes, TiLCl2(THF) and TiL2, containing the tridentate chiral Schiff-base ligand, L, prepared from the condensation reaction of 2,4-pentadione and (1R,2S)-(-)-1-aminoindanol, were synthesized and characterized by various analytical methods including X-ray crystallography. Ligand L acted as a dianionic tridentate ligand and, owing to a chiral center in the aminoindanol part, imparted chirality to its titanium complexes. The newly synthesized titanium complexes and previously reported analogous Ti complexes were used as catalysts in the cycloaddition of CO2 to propylene oxide as the first representatives of titanium complexes with tridentate Schiff base ligands to have been used for this purpose. These complexes provided high selectivity toward cyclic propylene carbonate (>99%) and showed considerable activities with TOF values up to 131 h(-1) in comparison with the previously reported catalyst systems. (C) 2017 Elsevier Ltd. All rights reserved.
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