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Quantitative determination of nitrite ion (NO2−) is of great importance in environmental and clinical investigations. A rapid visual and spectrophotometric assay for NO2− detection was developed based on a newly designed ruthenium complex, [Ru(npy)([9]aneS3)(CO)](ClO4) (denoted as RuNPY; npy = 2-(1-naphthyl)pyridine, [9]aneS3 = 1,4,7-trithiacyclononane). This complex traps NO+ produced in acidified...
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