Unusual manifestation of benzene radical cations in ESR spectra on sulfated zirconia

被引：9

作者：

Bedilo, AF ^{[1
]}

Volodin, AM ^{[1
]}

机构：

[1] Boreskov Inst Catalysis, Novosibirsk 630090, Russia

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2000年 / 158卷 / 01期

关键词：

sulfated zirconia; ESR; radical cations; benzene; biphenyl;

D O I：

10.1016/S1381-1169(00)00113-8

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：

A narrow singlet has been observed in the ESR spectra after benzene adsorption on sulfated zirconia, with its evacuation and freezing leading to the reversible formation of benzene dimer radical cations. The singlet has been proposed to result from the delocalization of the electron density throughout several benzene rings due to fast electron exchange. This distinguishes sulfated zirconia catalysts from zeolites where this effect is not observed because of the small size of channels. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

收藏

页码：405 / 408

页数：4

相关论文

共 10 条

[1]

Arata K., 1990, ADV CATAL, V37, P165

[2] Suppression of radical-cationic benzene oligomerization on sulfated zirconia [J].

Bedilo, AF ;

Volodin, AM .

REACTION KINETICS AND CATALYSIS LETTERS, 1999, 67 (01) :197-203

[3] Effect of light on reactions over sulfated zirconia [J].

Bedilo, AF ;

Kim, VI ;

Volodin, AM .

JOURNAL OF CATALYSIS, 1998, 176 (02) :294-304

[4] RADICAL INTERMEDIATES IN THE PHOTOINDUCED FORMATION OF BENZENE CATION-RADICALS OVER H-ZSM-5 ZEOLITES [J].

BOLSHOV, VA ;

VOLODIN, AM ;

ZHIDOMIROV, GM ;

SHUBIN, AA ;

BEDILO, AF .

JOURNAL OF PHYSICAL CHEMISTRY, 1994, 98 (31) :7551-7554

[5] SUPERACID AND CATALYTIC PROPERTIES OF SULFATED ZIRCONIA [J].

CHEN, FR ;

COUDURIER, G ;

JOLY, JF ;

VEDRINE, JC .

JOURNAL OF CATALYSIS, 1993, 143 (02) :616-626

[6] The mechanism of conversion of saturated hydrocarbons catalyzed by sulfated metal oxides: Reaction of adamantane on sulfated zirconia [J].

Farcasiu, D ;

Ghenciu, A ;

Li, JQ .

JOURNAL OF CATALYSIS, 1996, 158 (01) :116-127

[7] Sulfated zirconia-based strong solid-acid catalysts: Recent progress [J].

Song, XM ;

Sayari, A .

CATALYSIS REVIEWS-SCIENCE AND ENGINEERING, 1996, 38 (03) :329-412

[8] INFRARED, MICRO-CALORIMETRIC, AND ELECTRON-SPIN RESONANCE INVESTIGATIONS OF THE ACIDIC PROPERTIES OF THE H-ZSM-5 ZEOLITE [J].

VEDRINE, JC ;

AUROUX, A ;

BOLIS, V ;

DEJAIFVE, P ;

NACCACHE, C ;

WIERZCHOWSKI, P ;

DEROUANE, EG ;

NAGY, JB ;

GILSON, JP ;

VANHOOFF, JHC ;

VANDENBERG, JP ;

WOLTHUIZEN, J .

JOURNAL OF CATALYSIS, 1979, 59 (02) :248-262

[9]

WANG KT, 1996, J CATAL, V158, P311

[10] RECENT PROGRESS IN SOLID SUPERACID [J].

YAMAGUCHI, T .

APPLIED CATALYSIS, 1990, 61 (01) :1-25