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Citation: REN Baoyi, ZHAO Yang, LI Xiang, RAN Fanpeng, JIN Xiaodan. Oxybromination of Spiro [fluorene-9,9'-xanthene] over 12-Tungstophosphoric Acid Supported on Zirconia[J]. Chinese Journal of Applied Chemistry, ;2013, 30(11): 1299-1303. doi: 10.3724/SP.J.1095.2013.30095 shu

Oxybromination of Spiro [fluorene-9,9'-xanthene] over 12-Tungstophosphoric Acid Supported on Zirconia

College of Applied Chemistry, Shenyang University of Chemical Technology, Shenyang 110142, China

Received Date: 19 February 2013
Revised Date: 7 April 2013

A catalyst for the oxybromination of spiro[fluorene-9,9'-xanthene],12-tungstophosphoric acid (TPA) supported on zirconia,was prepared. Effects of TPA loading and activation temperature on the structure of the catalyst and the catalytic performance for oxybromination of spiro[fluorine-9,9'-xanthene] (SFX) have been investigated. The results of XRD and FTIR analysis show that the monoclinic zirconia transformed to tetragonal phase with the increase of TPA loading and calcinations temperature. A preliminary study on catalysts with 15% (mass fraction) TPA indicated that calcination at 300℃ could greatly enhance the stability of catalyst. The bromination position of the products was confirmed in the position of 2 of SFX from¹H NMR.
- tungstophosphoric acid,
- zirconia,
- oxybromination,
- spiro[fluorene-xanthene]
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