Degradation of Ba(DPM)(2) During Storage in a Desiccator for Extended Periods

Hyun-Kyu Ryu; Jung Shik Heo; Sung-Il Cho; Yong Suk Cho; Sang Heup Moon

Korean Journal of Chemical Engineering, Vol.16, No.6, 774-777, November, 1999

DOI10.1007/BF02698350 Export Citation

Degradation of Ba(DPM)(2) During Storage in a Desiccator for Extended Periods

Hyun-Kyu Ryu, Jung Shik Heo, Sung-Il Cho, Yong Suk Cho, and Sang Heup Moon^†

School of Chemical Engineering and Institute of Chemical Processes, Seoul National University, Seoul, Korea

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We have investigated the degradation mechanism of Ba(DPM)(2), which has been stored in a desiccator for extended periods using thermogravimetry, FTIR and mass spectroscopy. TG analysis shows that the aged sample loses the initial weight significantly at relatively low temperatures, the rate of weight loss decreases above 380 degrees C, and large amounts of residue remain at 550 degrees C. FTIR and mass spectroscopy show that Ba(DPM)(2) is easily attacked by CO2 and H2O in air, which results in the dissociation of chemical bonds between the Ba ion and the ligand at low temperatures. This eventually enhances the oligomerization of Ba(DPM)(2) and the formation of carbonates that exhibit low volatility and unstable thermal properties.

Keywords:Degradation;Ba(DPM)(2);Hydration;Carbonates;CVD

[References]

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Mikami M, Nakagawa I, Shimanouchi T, Spectrochim. Acta, 23A, 1037 (1967)
Minkina VG, Russ. Chem. Bull., 42, 1460 (1993)
Moon SH, Windawi HY, Katzer JR, Ind. Eng. Chem. Fundam., 20, 396 (1981)
Nakamoto K, Martell AE, J. Chem. Phys., 32, 588 (1960)
Panson AJ, Charles RG, Schmidt DN, Szeden JR, Machiko GJ, Braginski AI, Appl. Phys. Lett., 53, 1756 (1988)
Pinchas S, Silver BL, Laulicht I, J. Chem. Phys., 46, 1506 (1967)
Ryu HK, Cho SI, Heo JS, Cho YS, Moon SH, "Thermal Decomposition Mechanism of Ba(DPM)₂," Research on Chemical Intermediates, submitted
Sato R, Takahashi K, Yoshino M, Kato H, Ohshima S, Jpn. J. Appl. Phys., 32, 1590 (1993)
Yoshida M, Yamaguchi H, Sakuma T, Miyasaka Y, Lesaicherre PY, Ishitani A, J. Electrochem. Soc., 142(1), 244 (1995)
Zheng B, Braeckelmann G, Kujawski K, Lou I, Lane S, Kaloyeros AE, J. Electrochem. Soc., 142(11), 3896 (1995)

[1] Barron AR, Rees WS, "Group 2 Element and Related Compounds as Chemical Vapor Deposition Precursors for High-Temperature Superconducting Metal Oxide," Advanced Materials for Optics and Electronics, 2, 271 (1993)

[2] Bykov AF, Turgambaeva AE, Igumenov IK, "Barium Dipivaloylmethanate as a Promising Precursor for CVD," in Chemical Vapor Deposition, Allendorf, M.D. and Bernard, C., Editors, The Electrochemical Society Proceedings Series, Pennington, NJ, PV97-25, 857 (1997)

[3] Hanusa TP, Chem. Rev., 93, 1023 (1993)

[4] Hair ML, "Infrared Spectroscopy in Surface Chemistry," Marcel Dekker, New York (1967)

[5] Harima H, Ohnishi H, Hanaoka KI, Tachibana K, Kobayashi M, Hoshinouchi S, Jpn. J. Appl. Phys., 29, 1932 (1990)

[6] Mikami M, Nakagawa I, Shimanouchi T, Spectrochim. Acta, 23A, 1037 (1967)

[7] Minkina VG, Russ. Chem. Bull., 42, 1460 (1993)

[8] Moon SH, Windawi HY, Katzer JR, Ind. Eng. Chem. Fundam., 20, 396 (1981)

[9] Nakamoto K, Martell AE, J. Chem. Phys., 32, 588 (1960)

[10] Panson AJ, Charles RG, Schmidt DN, Szeden JR, Machiko GJ, Braginski AI, Appl. Phys. Lett., 53, 1756 (1988)

[11] Pinchas S, Silver BL, Laulicht I, J. Chem. Phys., 46, 1506 (1967)

[12] Ryu HK, Cho SI, Heo JS, Cho YS, Moon SH, "Thermal Decomposition Mechanism of Ba(DPM)₂," Research on Chemical Intermediates, submitted

[13] Sato R, Takahashi K, Yoshino M, Kato H, Ohshima S, Jpn. J. Appl. Phys., 32, 1590 (1993)

[14] Yoshida M, Yamaguchi H, Sakuma T, Miyasaka Y, Lesaicherre PY, Ishitani A, J. Electrochem. Soc., 142(1), 244 (1995)

[15] Zheng B, Braeckelmann G, Kujawski K, Lou I, Lane S, Kaloyeros AE, J. Electrochem. Soc., 142(11), 3896 (1995)