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Abstract

The invention relates to a triaza-cryptand of the general Formula I ##STR1## wherein a is selected from the group consisting of 0 and 1, b and c independently are selected from the group consisting of 0 and 1, with the proviso that not both of b and c are 0, d is selected from the group consisting of 1, 2 and 3, e and f independently are selected from the group consisting of 0 and 1, with the proviso that not both of e and f are 0, R.sub.1 and R.sub.2 are either hydrogen or form an alkyl(C.sub.1 -C.sub.4) benzene ring or an alkoxy(C.sub.1 C.sub.4) benzene ring together with C.sub.1 and C.sub.2, wherein C.sub.2 is the para position, R.sub.3 and R.sub.2 are either hydrogen or form an alkyl(C.sub.1 -C.sub.4) benzene ring or an alkoxy(C.sub.1 -C.sub.4) benzene ring together with C.sub.3 and C.sub.4, wherein C.sub.3 is the para position, R.sub.5 and R.sub.6 are either hydrogen or form a benzene ring or a naphtalene ring together with C.sub.5 and C.sub.6, R.sub.7 and R.sub.8 are either hydrogen or form an alkyl(C.sub.1 -C.sub.4) benzene ring or an alkoxy(C.sub.1 -C.sub.4) benzene ring together with C.sub.7 and C.sub.8, wherein C.sub.8 is the para position, R.sub.9 and R.sub.10 are either hydrogen or form an alkyl(C.sub.1 -C.sub.4) benzene ring or an alkoxy(C.sub.1 -C.sub.4) benzene ring together with C.sub.9 and C.sub.10, wherein C.sub.9 is the para position, X is a luminophoric moiety in ortho, para or meta position with respect to the nitrogen and m is selected from the group consisting of 0, 1 and 2. The triaza-cryptand of the invention is useful as a luminescence indicator for alkali ions.

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First Claim