Metal complexed acetylenic compounds useful as environmental indicating materials
US4788151A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1986 |
| Grant date | Nov 29, 1988 |
| Priority date | — |
| Expiry date | Sep 29, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N31/222
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Acetylenic complexes are disclosed that are useful as environmental indicating materials whereby exposure thereof to environmental stimuli induces a color change. These complexes contain at least one effective complexing metal and at least one acetylenic compound of the general formula: EQU [R--(C"C).sub.a --(CH.sub.2).sub.b --(C"C).sub.c ].sub.2.dHX Wherein a is 1 or 2, b is about 0-5; c is 0 or 1; with the proviso that when a is 1, b and c are 0, when a is 2, b is about 0-5 and c is 0 or 1; and R is --(CH.sub.2).sub.n -NHC(O)NHR'; wherein n is an integer of about 1 to 10; and R' is selected from the group consisting of: (a) hydrogen; (b) cycloalkyl; (c) alkenyl; (d) cycloalkenyl; (e) alkyl; (f) phenyl; (g) alkoxy; (h) alkoxy alkyl; and (i) alkoxycarbonylalkyl.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.