Isopolyoxorhenates observed by positive ion electrospray mass spectrometry |
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| Affiliation: | 1. Department of Chemistry, Jahangirnagar University, Savar, Dhaka 1342, Bangladesh;2. Department of Chemistry, University College London, 20 Gordon Street London WC1H OAJ, UK;3. Department of Chemistry, King''s College London, Britannia House, 7 Trinity Street, London SE1 1DB, UK |
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| Abstract: | Unknown positive ion isopolyoxorhenates have been observed using electrospray ionization mass spectrometry (ESI+). The ESI+ studies of ammonium and alkali metal (Na+ and K+) perrhenate salts in aqueous solution at pH 4.5 show the existence of the series Ax+1ReVIIxO4x]+ (where x=1–5 and A=NH4+, Na+ and K+). In the potassium perrhenate system, the series Kx+2ReVReVIIxO4x+3]+ (x=0–4) has also been characterised. All of these four series have {AReO4} as the aggregation unit. In the ammonium perrhenate system, the monomeric Re(VII)-containing species, (NH4)2(H2ReO5)]+, (NH4)3(HReO5)]+ and (NH4)4(ReO5)]+ were also detected. |
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