Formation of C H Ablation of Graphite, Coal or C Particles Suspended in Selected Solvents - Polyynes: Synthesis, Properties, and Applications - page 123

7 Formation of C 2n H 2

Polyynes by Laser
Ablation of Graphite,
Coal or C 60 Particles
Suspended in Selected
Solvents

Masaharu Tsuji, Shingo Kuboyama,
Takeshi Tsuji and Taro Hamagami

CONTENTS

7.1 Introduction .................................................. 127
7.2 Experimental .................................................. 129
7.3 Results and Discussion ........................................ 130
7.3.1 Polyynes from Graphite ................................ 130
7.3.2 Polyynes from Coals .................................... 139
7.3.3 Polyynes from C 60 ...................................... 140
7.4 Formation Mechanism of Polyynes from Three Carbon
Sources in Solutions............................................ 146
7.5 Conclusions . ................................................... 151
Acknowledgments .................................................. 152
References .......................................................... 152

7.1 INTRODUCTION

Compared with extensive studies on the formation of carbon clusters by
laser ablation of graphite in the gas phase since the discovery of C 60 [1], little
work has been done on the laser ablation of graphite in the liquid phase,
except for the following pioneering studies [2,3]. Fojtik and Henglein [2]

127