- Fluoride-selective host based on anion-π interactions, ion pairing, and hydrogen bonding: Synthesis and fluoride-ion sandwich complex
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A fluoride sandwich: A cylindrophane macrocycle framed with cyanuric acid rings selectively complexes fluoride ion by a combination of anion-π interactions and ion-pair-reinforced hydrogen bonds. This compound is the first example of a purpose-designed host that exploits anion-π bonding. (Chemical Equation Presented).
- Mascal, Mark,Yakovlev, Ilya,Nikitin, Edward B.,Fettinger, James C.
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- Fluoride carrier for positron emission tomography
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The present invention provides a compound of the formula wherein R1 is an ammonium bridge. The compounds of the present invention can be linked to a biological molecule that targets a specific type of cell. The compounds of the present inventio
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Page/Page column 8
(2010/11/28)
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- Phosphorous amine lubricant additives
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Lubricant additives are produced by reacting an alkoxylated amine with phosphorous acid. The additives preferably also contain a boron moiety which is reacted with the phosphorous acid and amine, preferably in a one step reaction. More preferably, a mono-functional alcohol or a long-chain aliphatic carboxylic acid is added to this mixture. The additives are particularly useful in metal working oils and particularly as extreme pressure additives to replace the currently used chlorinated paraffin additives.
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- Synthesis and Mesogenic Properties of N-n-alkyl-N'-(4-n-Pentyloxyphenyl)-Piperazines
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The N-n-alkyl-N'-(4-n-pentyloxyphenyl)-piperazines (4) exhibit ordered smectic phases at temperatures below 100 deg C.For 3, 4, 5 and 6 carbons in the alkyl chain, two smectic phases are present and for 7, 8 and 9 carbons only one smectic phase is present.The ΔH values for 4, 5, 6 and 7 carbons are anomalous.From optical and X-ray data, the smectic phases are identified as probably smectic E and B phases.
- Zuniga, H.,Bartulin, J.,Ramirez, A.,Muller, H.,Taylor, T. R.
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p. 131 - 140
(2007/10/02)
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