The infra-red spectra of complexes of beryllium with tri-n-octylphosphine oxide and di(2-ethylhexyl) phosphoric acid
Affiliation:
1. CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
Abstract:
The interaction of beryllium with tri-n-octylphosphine oxide (TOPO) and with di(2-ethylhexyl) phosphoric acid (HDEHP) has been studied by i.r. spectroscopy. For beryllium nitrate -TOPO solutions, the small shift (48 cm−1) in vPO and the small splitting (195 cm−1) of the nitrate band in relation to the large ionic potential (er role=presentation style=font-size: 90%; display: inline-block; position: relative;>) of the beryllium ion are explained on the basis of steric hindrance. A similar situation is found in the aluminium nitrate-TOPO system. In the spectrum of Be(DEHP)2(HDEHP)2 a very broad band in the region 1700−800 cm−1 indicates the presence of strong, symmetrical or near-symmetrical hydrogen bonding. Be(DEHP)2 occurs at higher beryllium loadings and bands at 763 and 685 cm−1 are shown to be BeO vibrational modes. The system Fe3+-HDEHP shows similar features and studies have been made of the effect of deuteration and low temperatures on the spectrum of Fe(HEHP)3(HDEHP)3.
