## Abstract

Volatile trends are established for a series of M(β-diketonate)_{n} complexes, where M = Cu (n = 2); Al, Sc, Cr, Fe, Co, Ga (n = 3); Zr (n = 4) and β-diketonate = acetylacetonate (acac), trifluoroacetylacetonate (tfac), hexafluoroacetylacetonate (hfac) and 2,2,6,6-tetramethyl-3,5-heptanedionate (tmhd). Sublimation enthalpies (ΔH_{sub}) were calculated from thermogravimetric analysis (TGA) data, which show that the dependence of ΔH_{sub} on the number and type of intermolecular Interactions appears to be more substantial than molecular mass effects. Irrespective of the metal, the ΔH_{sub} values for the M(tmhd)_{3} derivative have a ΔH_{sub} value of between 93 and 99% of that of the M(acac)_{3} derivative. In contrast, the M(tfac)_{3} and M(hfac)_{3} derivatives have ΔH_{sub} values of ca. 82% and 54% of the values for the corresponding M(acac)_{3}. Similar trends are observed for M(β-diketonate)_{2} and M(β-diketonate)_{4} derivatives. The relationship between the ΔH_{sub} and (T_{sub}) of the substituted β-diketonate derivatives as compared with the values for parent M(acac)_{n} may be used to predict either quantity for a range of M(β-diketonate)_{n} complexes where the values for M(acac)_{n} are known. Using the TGA sublimation data, vapour pressures have been calculated for each of the M(β-diketonate)_{n} complexes.

Original language | English |
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Pages (from-to) | 223-232 |

Number of pages | 10 |

Journal | Advanced Functional Materials |

Volume | 10 |

Issue number | 3-5 |

State | Published - 2000 |

## Keywords

- CVD precursor
- Enthalpy of sublimation
- Thermogravimetric analysis
- Vapour pressure
- β-diketonate