Coronene Fusion by Heat Treatment: Road to Nanographenes

被引：52

作者：

Talyzin, A. V. ^{[1
]}

Luzan, S. M. ^{[1
]}

Leifer, K. ^{[2
]}

Akhtar, S. ^{[2
]}

Fetzer, J. ^{[3
]}

Cataldo, F. ^{[4
]}

Tsybin, Y. O. ^{[5
]}

Tai, C. W. ^{[6
]}

Dzwilewski, A. ^{[7
]}

Moons, E. ^{[7
]}

机构：

[1] Umea Univ, Dept Phys, SE-90187 Umea, Sweden

[2] Uppsala Univ, Div Electron Microscopy & Nanoengn, Dept Engn Sci, Angstrom Lab, SE-75121 Uppsala, Sweden

[3] Fetzpahs Consulting, Pinole, CA 94564 USA

[4] Osserv Astrofis Catania, Ist Nazl Astrofis, I-95123 Catania, Italy

[5] Ecole Polytech Fed Lausanne, Biomol Mass Spectrometry Lab, CH-1015 Lausanne, Switzerland

[6] Stockholm Univ, Dept Mat & Environm Chem, S-10691 Stockholm, Sweden

[7] Karlstad Univ, Dept Phys & Elect Engn, S-65188 Karlstad, Sweden

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2011年 / 115卷 / 27期

基金：

瑞典研究理事会;

关键词：

POLYCYCLIC AROMATIC-HYDROCARBONS; INFRARED-SPECTRA; RAMAN-SPECTRUM; GRAPHITE; SPECTROSCOPY; TEMPERATURE; SIMULATION; PRESSURE; GROWTH; GAS;

D O I：

10.1021/jp2028627

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：

The reactions of coronene dehydrogenation and fusion upon heat treatment in the temperature range of 500-700 degrees C were studied using XRD, TEM, Raman, IR, and NEXAFS spectroscopy. The formation of a coronene dimer (dicoronylene) was observed at temperatures 530-550 degrees C; dicoronylene can easily be separated using sublimation with a temperature gradient. An insoluble and not sublimable black precipitate was found to form at higher temperatures. Analysis of the data shows that dimerization of coronene is followed at 550-600 degrees C by oligomerization into larger molecules. Above 600 degrees C amorphization of the material and formation of graphitic nanoparticles was observed. Coronene fusion by annealing is proposed as a road to synthesis of larger polycyclic aromatic hydrocarbons and nanographenes.

引用

页码：13207 / 13214

页数：8

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