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From green algae to calcium inside buckyballs
Author(s) -
Rose Harry R.,
Dance Ian G.,
Fisher Keith J.,
Smith Derek R.,
Willett Gary D.,
Wilson Michael A.
Publication year - 1994
Publication title -
organic mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0030-493X
DOI - 10.1002/oms.1210290905
Subject(s) - barium , pyrolysis , strontium , laser ablation , chemistry , calcium , ion , protonation , analytical chemistry (journal) , laser , mass spectrometry , materials science , inorganic chemistry , organic chemistry , chromatography , optics , physics
Coorongite and carbonaceous residues from coorongite pyrolysis at 450 and 500°C were studied by laser ablation Fourier transform mass spectrometry. Raw coorongite gave positive‐ion spectra having mainly protonated species of m/z 80–300 when laser ablated with a high laser power density. Endohedral fullerene positive ions of calcium were observed during the laser ablation of coorongite pyrolysis residues. Pyrolysis of the raw coorongite at 450 and 500°C produced residues which on laser ablation using the fundamental frequency of an Nd: YAG laser (1064 nm) gave a series of calcium fullerides. These ions were observed using low laser power densities (100–600 kW cm –2 ) Mixing the coorongite pyrolysis residue with barium sulphate gave M@C n + ions The symbol ‘@’, as in Ca@ 60 , is used to represent an endohedral complex, i.e. the adduct is located inside the carbon cage. where M = calcium or barium. Mixing the coorongite pyrolysis residue with strontium oxalate also gave M@C n + ions where M = calcium or strontium. No ions containing two or more metals were detected.