15038-67-2Relevant academic research and scientific papers
Li+ selective podand-type fluoroionophore based on a diphenyl sulfoxide derivative bearing two pyrene groups
Nishimura, Yukihiro,Takemura, Tetsuo,Arai, Sadao
, p. 6844 - 6857 (2011/10/31)
New podand-type fluoroionophores having two pyrene moieties: 2,2′-bis(1-pyrenylacetyloxy)diphenyl sulfide (3), 2,2-bis(1- pyrenylacetyloxy)diphenyl sulfoxide (4), and 2,2-bis(1-pyrenylacetyloxy) diphenyl sulfone (5), have been synthesized by connecting two 1-pyrenecarbonylmethyl groups with the two hydroxy groups of 2,2-dihydroxydiphenyl sulfide, sulfoxide, and sulfone, respectively. Their complexation behavior toward alkali metal ions was examined by fluorescence spectroscopy. Among these fluoroionophores, compound 4, having a sulfinyl group, showed high selectivity toward Li+.
PROCESS FOR PRODUCING DIHYDROXYDIPHENYL SULFONE
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Page/Page column 4, (2008/06/13)
The present invention provides a process for producing dihydroxydiphenylsulfone wherein trihydroxytriphenylsulfone and coloring impurities are effectively removed without altering the isomeric composition of dihydroxydiphenylsulfone. In particular, the present invention provides a process for producing dihydroxydiphenylsulfone comprising the steps of dissolveing or suspending in an aqueous solvent crude dihydroxydiphenylsulfone containing trihydroxytriphenylsulfone, adjusting the pH to 5-7, optionally cooling, and separating the crystalline dihydroxydiphenylsulfone thus precipitated.
Carbonates of acetylenic alcohols
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, (2008/06/13)
Polymerizable carbonate compounds of the formula: wherein A is an aromatic polycycle, R1 and R2 are independently hydrogen atom or alkyl, and n is 1, 2 or 3, are disclosed. They are useful as a component of nonemanating, self-curing and heat resistant resin compositions.
Process for preparation of acetylene terminated sulfones, oligomers and precursors therefor
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, (2008/06/13)
Acetylene terminated sulfones and oligomers thereof are prepared by reacting a sulfonyldiphenol with a material selected from the group consisting of a meta-dibromobenzene, a para-dibromobenzene and mixtures thereof in the presence of a potassium base to form a bis-bromophenoxydiphenyl sulfone, which is reacted with a substituted terminal acetylene compound containing at least three carbon atoms and an hydroxy group on the carbon atom adjacent to the acetylene group to form an hydroxy-acetylene terminated phenoxydiphenyl sulfone, which is then subjected to base catalyzed cleavage to form the desired acetylene terminated sulfones and oligomers. An hydroxy-arylacetylene terminated sulfone is prepared by reacting a sulfonyldiphenyl with a material selected from the group consisting of meta-dibromobenzene para-dibromobenzene and mixtures thereof in the presence of a sodium base. The resulting hydroxyphenylbromophenoxyphenyl sulfone can be: (1) reacted with a substituted terminal acetylene compound to form an hydroxy-arylacetylene terminated sulfone which in turn can be reacted with a dinitrofluorobenzene to form a dinitro-acetylene terminated sulfone which in turn can be reacted with sodium dithionite and sodium hydroxide to form a diaminoacetylene terminated sulfone; (2) reacted with a dibromobenzene to form a bis-bromophenoxydiphenyl sulfone; or (3) reacted with a bis-bromophenoxydiphenyl sulfone to form an oligomeric bromophenoxydiphenyl sulfone, which can be used to form an oligomeric actylene terminated sulfone. Metal contaminants, such as palladium and copper, used in the preparation of the acetylene terminated sulfones are removed by admixing the metal contaminated sulfone with a hydrogen halide and then contacting the admixture with an amino compound to complex the metal contaminant.
