P-31 NMR SPIN-LATTICE RELAXATION-TIMES AS AN INDIRECT PROBE OF ADSORBED WATER IN SUPPORTED AQUEOUS-PHASE CATALYSTS

被引：14

作者：

BUNN, BB ^{[1
]}

BARTIK, T ^{[1
]}

BARTIK, B ^{[1
]}

BEBOUT, WR ^{[1
]}

GLASS, TE ^{[1
]}

HANSON, BE ^{[1
]}

机构：

[1] VIRGINIA POLYTECH INST & STATE UNIV,DEPT CHEM,BLACKSBURG,VA

来源：

JOURNAL OF MOLECULAR CATALYSIS | 1994年 / 94卷 / 02期

关键词：

ADSORBED WATER; AQUEOUS PHASE; P-31 NMR SPECTROSCOPY; RHODIUM; SULFONATED TRIPHENYL PHOSPHINE SALT;

D O I：

10.1016/S0304-5102(94)87037-3

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Phosphorus-31 spin lattice relaxation times, T-1's, for SAP hydroformylation catalysts derived from HRh(CO) (TPPTS)(3) and TPPTS (TPPTS = trisulfonated triphenyl phosphine trisodium salt) are consistent with a liquid-like character for the supported aqueous phase. The T-1 for solid TPPTS is 1150 s while for TPPTS in a supported aqueous phase T-1 varies from 220 to 4.9 s. A T-1 of 4.9 a is close to the value obtained for TPPTS in solution and is observed at a H2O/P ratio of 24.9. At this level of water content previously reported SAP catalysts have shown maximum catalytic activity for the hydroformylation of olefins.

引用

页码：157 / 161

页数：5

共 11 条

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