Abstract: The present invention resides in the discovery of a new class of compounds defined herein as "chromogenic hemispherands" useful for the measurement of ions, in particular, ions in aqueous solution, methods of using the chromogenic hemispherands and test devices containing the chromogenic hemispherands. The chromogenic hemispherands of the invention have the structure ##STR1## wherein: R, same or different, is hydrogen, lower alkyl, lower alkylidene, lower alkenyl, allyl or aryl;R', same or different, is lower alkyl, lower alkylidene, lower alkenyl, allyl or aryl;R", same or different, is hydrogen, lower alkyl, lower alkylidene, lower alkenyl, allyl or aryl;Q is a chromogenic moiety capable of providing the appearance of or change in color, or which is otherwise capable of providing a detectable response in the presence of a particular cation;m is 1 to about 3;n is 0 to about 3;P is an aliphatic or aromatic subunit, e.g., --CR.sub.2 CR.sub.2 OCR.sub.2 CR.sub.

Abstract: The present invention resides in the discovery of a class of compounds defined herein as "chromogenic cryptahemispherands" useful for the measurement of ions, in particular, ions in aqueous solution, which have the structure ##STR1## wherein: R, same or different, is hydrogen, lower alkyl, lower alkylidene, lower alkenyl, allyl or aryl;R', same or different, is lower alkyl, lower alkylidene, lower alkenyl, allyl or aryl;R", same or different, is hydrogen, lower alkyl, lower alkylidene, lower alkenyl, allyl or aryl;Q is a chromogenic moiety capable of providing the appearance of or change in color, or which is otherwise capable of providing a detectable response in the presence of a particular cation;a, b, m and n, same or different, are 1 to about 3; and x, y, same or different, are 1 to about 4.A test device utilizing one or more of the compounds for performing such measurements is also disclosed.

Abstract: The invention is reagents and procedures for determining an amount of cations present in a sample, the reagent comprising one or more chromogenic cryptand compounds of formula I ##STR1## wherein k and j, either same or different, are equal to 1 to about 5;m and n, either same or different, are equal to 0 to about 4;a and e, either same or different, are equal to 0 to about 2;b and d, either same or different, are equal to 0 to about 5;R, either same or different, is hydrogen, lower alkyl, lower alkylidene, lower alkenyl, allyl, or aryl; and-Q- is ##STR2## wherein X is CH, N, or COH; andY includes ##STR3## except that when Q is ##STR4## wherein Y is selected from the group consisting of p-nitrophenylazo, 3-phenylisothiazalyl -5-azo, isothiazolyl-5-azo, thiazolyl-5-azo, 2,4,6-trinitrophenylazo, p-nitrostyryl, p-benzoquinonemonoimino and bis-(p-dimethylaminophenyl)hydroxymethyl, then the following condition cannot be present: that simultaneously b is equal to 0 or 1, d is equal to 0 or 1, j is equal to 1, n is e

Abstract: A coating of organo-phosphonitrile polymer is bonded to the surface of a cured rubber article such as a catheter with a primer coating containing a cross-linked di- or poly-vinyl compound.

Abstract: A coating of organo-phosphonitrile polymer is bonded to the surface of a cured rubber article such as a catheter with a primer coating containing a cross-linked di- or poly-vinyl compound.