Bidimensional solvation and delocalisation of electrons at the surface of an insulating oxide: The role of surface hydroxyl groups on MgO

被引：13

作者：

Chiesa, M ^{[1
]}

Paganini, MC ^{[1
]}

Giamello, E ^{[1
]}

机构：

[1] Univ Turin, IFM, Dipartimento Chim, Ctr Excellence,NIS, I-10125 Turin, Italy

来源：

CHEMPHYSCHEM | 2004年 / 5卷 / 12期

关键词：

EPR spectroscopy; hydroxylation; nanostructures; surface chemistry; UV/Vis spectroscopy;

D O I：

10.1002/cphc.200400466

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：

(Graph presented) Surface electron tuning: Combined EPR and UV/Vis-NIR spectroscopic studies bring evidence for excess electron delocalisation at the surface of MgO as a function of hydroxyl coverage (see picture). The presence of surface hydroxyl groups induces domains of interacting paramagnetic centres on the surface of MgO providing a way of tuning the degree of electron delocalisation on the surface.

引用

页码：1897 / 1900

页数：4

共 27 条

[1]

CERNETTE DP, 2003, CHEM MATER, V15, P1441

[2] Laminar growth of ultrathin metal films on metal oxides:: Co on hydroxylated α-Al2O3(0001) [J].

Chambers, SA ;

Droubay, T ;

Jennison, DR ;

Mattsson, TR .

SCIENCE, 2002, 297 (5582) :827-831

[3] Local environment of electrons trapped at the MgO surface:: Spin density on the oxygen ions from 17O hyperfine coupling constants [J].

Chiesa, M ;

Martino, P ;

Giamello, E ;

Di Valentin, C ;

del Vitto, A ;

Pacchioni, G .

JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (31) :11529-11534

[4] First evidence of a single-ion electron trap at the surface of an ionic oxide [J].

Chiesa, M ;

Paganini, MC ;

Giamello, E ;

Di Valentin, C ;

Pacchioni, G .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2003, 42 (15) :1759-1761

[5]

CHIESA M, 2003, ANGEW CHEM, V115, P1801

[6] INTRAMOLECULAR LONG-DISTANCE ELECTRON-TRANSFER IN ORGANIC-MOLECULES [J].

CLOSS, GL ;

MILLER, JR .

SCIENCE, 1988, 240 (4851) :440-447

[7]

COLUCCIA S, 1988, MATER CHEM PHYS, V18, P455

[8] ELECTRIDES, NEGATIVELY CHARGED METAL-IONS, AND RELATED PHENOMENA [J].

DYE, JL .

PROGRESS IN INORGANIC CHEMISTRY, 1984, 32 :327-441

[9] Dissolved alkali metals in zeolites [J].

Edwards, PP ;

Anderson, PA ;

Thomas, JM .

ACCOUNTS OF CHEMICAL RESEARCH, 1996, 29 (01) :23-29

[10] THE ELECTRONIC-PROPERTIES OF METAL SOLUTIONS IN LIQUID-AMMONIA AND RELATED SOLVENTS [J].

EDWARDS, PP .

ADVANCES IN INORGANIC CHEMISTRY, 1982, 25 :135-185

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