Abstract:
Disclosed herein are compositions of tricarbazole triazolophane (tricarb) of Formulas (I), (II) and (III): wherein R of Formula (I) is selected from a group consisting of alkyl (for example, C6-C18), alkyl-substituted phenyl derivatives, and substituted glycol derivatives, among others, or a combination thereof, and R, R′ and R″ of Formulas (II) and (III) are independently selected from a group consisting of alkyl (for example, C6 to C18), alkyl-substituted phenyl derivatives, and substituted glycol derivatives, or a combination thereof. The disclosure presents examples of thin films composed of the same as well as methods of binding anions from the same.
Abstract:
Treatment of anion exchange materials containing hydroxyl containing moieties in the beta position relative to the quaternary center in the hydroxide form with glycidol substantially alters the selectivity of the anion exchange material. Furthermore, sequential treatments of first a hydroxide containing solution to put the anion exchange material in the hydroxide form followed by treatment with glycidol in an alternating sequence progressively changes selectivity in a predictable manner allowing facile manipulation of selectivity. Unique to the selectivities achievable with this chemistry is the ability to reverse the elution order of sulfate and carbonate. With all other known systems, carbonate elutes ahead of sulfate and sometimes compromises the ability to quantitate sulfate. With glycidol treatment, carbonate can be moved after sulfate which eliminates interference issues for samples containing significantly more carbonate than sulfate. This modification is useful for columns operated with a hydroxide or carbonate eluent system.
Abstract:
The present invention provides a capsule-type compound consisting of: a capsule-type divalent cation consisting of a capsule framework represented by the following formula (1) and a sulfate ion (SO42−) encapsulated in the capsule framework; and a sulfate ion (SO42−) as a counter ion to the capsule-type divalent cation. In the formula (1), R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, and R13 each independently represent a hydrogen atom or a methyl group; and M1 and M2 each independently represent Cu2+, Fe2+, Ni2+, Co2+, or Zn2+.
Abstract:
Stationary phases for chromatographic ion exchange or catalysis produced by esterification of solid substances having acidic OH groups at the surface as Components I with organic compounds as Components II. The specific surface area of Components I is above 100 cm2/g and Components II each have at least one hetero atom in their molecules, disregarding the oxygen connected to a carbon atom in the molecule for esterification with the acid OH group in Component I. By hetero-atoms is meant an atom other than carbon and hydrogen.
Abstract:
A method for the removal of a substance carrying a negative charge and being present in an aqueous liquid (I). The method comprises the steps of: (i) contacting the liquid with a matrix carrying a plurality of ligands comprising a positively charged structure and a hydrophobic structure, and (ii) desorbing the substance. The characterizing feature is that (I) each of said ligands together with a spacer has the formula: -- SP---[Ar-R1-N (R2R3R4)] where (A) [Ar-R1-N (R2R3R4)] represents a ligand a) Ar is an aromatic ring, b) R1 is [(L)nR'1]m where n and m are integers selected amongst zero or 1; L is amino nitrogen, ether oxygen or thioether sulphur; R'1 is a linker selected among 1) hydrocarbon groups; 2) -C(=NH)-; c) R2-4 are selected among hydrogen and alkyls; (B) SP is a spacer providing a carbon or a heteroatom directly attached to Ar-R1-N (R2R3R4); (C) --- represents that SP replaces a hydrogen in (Ar-R1-N (R2R3R4); (D) -- represents binding to the matrix; and (II) desorption. There is also described (a) anion-exchangers having high breakthrough capacities, (b) a screening method and (c) a desalting protocol.
Abstract translation:一种用于去除携带负电荷并存在于水性液体(I)中的物质的方法。 该方法包括以下步骤:(i)使液体与承载包含带正电结构和疏水结构的多个配体的基质接触,和(ii)解吸该物质。 其特征在于,(I)每个所述配位体与间隔基一起具有下式:-SP --- [Ar-R 1 -N +(R 2 R 3 R 4)]其中(A)[Ar-R 1 -N +(R2R3R4)]表示配体a)Ar是芳香环,b)R1是[(L)nR'1] m,其中n和m是选自零或1的整数; L为氨基氮,醚氧或硫醚硫; R'1是选自1)烃基的连接体; 2)-C(= NH) - ; c)R2-4选自氢和烷基; (B)SP是提供直接与Ar-R 1 -N +(R 2 R 3 R 4)连接的碳或杂原子的间隔基; (C)---表示SP替代(Ar-R1-N +(R2R3R4)中的氢;(D) - 表示与基质的结合;和(II)解吸,还描述了(a) 具有高突破能力的阴离子交换剂,(b)筛选方法和(c)脱盐方案。
Abstract:
Anion exchangers for chromatographic separation, containing two positive charges at a distance of two atoms from each other. The invention contemplates in particular anion exchangers containing two quaternary amino groups.
Abstract:
In one aspect, separation media are described herein operable for removing one or more water contaminants, including NOM, fluorinated chemicals, and/or derivatives thereof. Briefly, a separation medium comprises a silica-containing granular support; and an oligomeric stationary phase forming a film on individual grains of the granular support. In some embodiments, the oligomeric stationary phase comprises oligomeric chains covalently bound to the individual grains.