Publication Date:
1999-09-08
Description:
Addition of aliphatic polyols to aqueous silicate solutions is shown to yield high concentrations of stable polyolate complexes containing five- or six-coordinated silicon. Coordinating polyols require at least four hydroxy groups, two of which must be in threo configuration, and coordinate to silicon via hydroxy oxygens at chain positions on either side of the threo pair. The remarkable ease by which these simple sugar-like molecules react to form hypervalent silicon complexes in aqueous solution supports a long-standing supposition that such species play a significant role in the biological uptake and transport of silicon and in mineral diagenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kinrade, S D -- Del Nin, J W -- Schach, A S -- Sloan, T A -- Wilson, K L -- Knight, C T -- 1 S10 RR 10444-01/RR/NCRR NIH HHS/ -- GM-42208/GM/NIGMS NIH HHS/ -- RR 01811/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1999 Sep 3;285(5433):1542-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry, Lakehead University, 955 Oliver Road, Thunder Bay, Ontario, Canada P7B 5E1. Stephen.Kinrade@lakeheadu.ca〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10477513" target="_blank"〉PubMed〈/a〉
Keywords:
Anions/chemistry
;
Chemistry, Physical
;
Hydrogen-Ion Concentration
;
Magnetic Resonance Spectroscopy
;
Molecular Structure
;
Physicochemical Phenomena
;
Silicates/*chemistry
;
Silicon/*chemistry
;
Solutions
;
Sugar Alcohols/*chemistry
;
Water
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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