Chromogenic hemispherands, useful for the assay of ions in aqueous solutions, have the formula:
wherein each R is independently hydrogen, lower alkyl, lower alkylidene, lower alkenyl, allyl or aryl;
each Rʹ is independently lower alkyl, lower alkylidene, lower alkenyl, allyl or aryl;
each Rʺ is independently hydrogen, lower alkyl, lower alkylidene, lower alkenyl, allyl or aryl;
P is an aliphatic or aromatic subunit, for example of formula -CR₂CR₂OCR₂CR₂-,
n is about 0 to 3;
m is 1 to about 3; and
Q is a chromogenic moiety capable of providing the appearance of, or a change in, colour or another detectable response in the presence of a particular cation.
可用于检测
水溶液中离子的致色半球体具有以下式子:
其中每个 R 独立地是氢、低级烷基、低级亚烷基、低级烯基、烯丙基或芳基;
每个 Rʹ独立地是低级烷基、低级亚烷基、低级烯基、烯丙基或芳基;
每个 Rʺ 独立地是氢、低级烷基、低级亚烷基、低级烯基、烯丙基或芳基;
P 是脂肪族或芳香族亚基,例如式-CR₂CR₂OCR₂CR₂-、
n 约为 0 至 3
m 是 1 至约 3;以及
Q 是致色分子,能够在特定阳离子存在时产生颜色或其他可检测反应,或使颜色或 其他可检测反应发生变化。