LASER MASS SPECTROSCOPIC INVESTIGATIONS OF PURIFIED, LABORATORY-PRODUCED C60/C70

被引:81
作者
ULMER, G [1 ]
CAMPBELL, EEB [1 ]
KUHNLE, R [1 ]
BUSMANN, HG [1 ]
HERTEL, IV [1 ]
机构
[1] UNIV FREIBURG,FAK PHYS,W-7800 FREIBURG,GERMANY
关键词
D O I
10.1016/0009-2614(91)80113-C
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
Laser desorption mass spectra of Kratschmer's purified "fullerite" have been studied in a reflectron time-of-flight mass spectrometer, Desorption with 308 or 248 nm yields direct ions emerging from the substrate with high efficiency. At low fluence, a distribution of pure C60+ (76%), C70+ (23%) and, perhaps, a small amount C84+ (less-than-or-equal-to 1.5%) ions are observed. As the fluence is increased, fragmentation of these species and aggregation to larger clusters are observed. Post-ionisation of neutral desorbed species with 248 or 308 nm is much less efficient and leads to substantial fragmentation both immediately on ionisation as well as in the field-free region of the mass spectrometer (a timescale of up to 100-mu-s).
引用
收藏
页码:114 / 119
页数:6
相关论文
共 15 条
[1]   CHARACTERIZATION OF THE SOLUBLE ALL-CARBON MOLECULES C60 AND C70 [J].
AJIE, H ;
ALVAREZ, MM ;
ANZ, SJ ;
BECK, RD ;
DIEDERICH, F ;
FOSTIROPOULOS, K ;
HUFFMAN, DR ;
KRATSCHMER, W ;
RUBIN, Y ;
SCHRIVER, KE ;
SENSHARMA, D ;
WHETTEN, RL .
JOURNAL OF PHYSICAL CHEMISTRY, 1990, 94 (24) :8630-8633
[2]   THE VIBRATIONAL RAMAN-SPECTRA OF PURIFIED SOLID FILMS OF C-60 AND C-70 [J].
BETHUNE, DS ;
MEIJER, G ;
TANG, WC ;
ROSEN, HJ .
CHEMICAL PHYSICS LETTERS, 1990, 174 (3-4) :219-222
[3]   STABILITY AND FRAGMENTATION OF CARBON CLUSTERS [J].
CAMPBELL, EEB ;
ULMER, G ;
BUSMANN, HG ;
HERTEL, IV .
CHEMICAL PHYSICS LETTERS, 1990, 175 (05) :505-510
[4]   AN INTENSE, SIMPLE CARBON CLUSTER SOURCE [J].
CAMPBELL, EEB ;
ULMER, G ;
HASSELBERGER, B ;
BUSMANN, HG ;
HERTEL, IV .
JOURNAL OF CHEMICAL PHYSICS, 1990, 93 (09) :6900-6907
[5]   INVESTIGATION OF POSITIVE AND NEGATIVE IONIC PRODUCTS FROM LASER ABLATION OF POLYMERS [J].
CAMPBELL, EEB ;
ULMER, G ;
HASSELBERGER, B ;
HERTEL, IV .
APPLIED SURFACE SCIENCE, 1989, 43 :346-351
[6]   CARBON CLUSTERS REVISITED - THE SPECIAL BEHAVIOR OF C-60 AND LARGE CARBON CLUSTERS [J].
COX, DM ;
REICHMANN, KC ;
KALDOR, A .
JOURNAL OF CHEMICAL PHYSICS, 1988, 88 (03) :1588-1597
[7]   FORMATION OF HIGH MASS CARBON CLUSTER IONS FROM LASER ABLATION OF POLYMERS AND THIN CARBON-FILMS [J].
CREASY, WR ;
BRENNA, JT .
JOURNAL OF CHEMICAL PHYSICS, 1990, 92 (04) :2269-2279
[8]   SOME MODEL-CALCULATIONS OF CARBON CLUSTER GROWTH-KINETICS [J].
CREASY, WR .
JOURNAL OF CHEMICAL PHYSICS, 1990, 92 (12) :7223-7233
[9]  
JOHNSON RD, IN PRESS J AM CHEM S
[10]   SOLID C-60 - A NEW FORM OF CARBON [J].
KRATSCHMER, W ;
LAMB, LD ;
FOSTIROPOULOS, K ;
HUFFMAN, DR .
NATURE, 1990, 347 (6291) :354-358