@article{0bf53ee5153a4635a8eb1338b8f1b4c8,
title = "Structural characterisation of Nitrazine Yellow by NMR spectroscopy",
abstract = "Nitrazine Yellow is an indicator used in microscopy with variations of absorption visible spectrum in pH range 6.0-7.0. The stated structure, deriving from the attack of 2′,4′-dinitrobenzenediazonium salt to ortho hydroxy position of 1-naphthol-3,6-disulphonic acid, appears incoherent with the alochromic behaviour. Nmr analysis and, in particular, HMQC and HMBC two-dimensional techniques showed that the real structure comes from an attack of the diazonium salt to para hydroxy position.",
keywords = "2D-COSY, Alochromism, Azodyes, Diazo coupling, H- C-HMQC, H-C-HMBC, H-H NOESY, NMR spectroscopy, Nitrazine Yellow",
author = "Guido Viscardi and Pierluigi Quagliotto and Claudia Barolo and Giuseppe Caputo and Giuseppe Digilio and Iacopo Degani and Ermanno Barni",
note = "Funding Information: This work was supported by the Ministero dell'Universit{\`a} e della Ricerca Scientifica e Tecnologica (MURST), National Project “Dry-state arenediazonium o-benzenedisulfonimides: synthesis, reactivity and applications” and by the University of Torino.",
year = "2003",
month = apr,
doi = "10.1016/S0143-7208(02)00164-X",
language = "English",
volume = "57",
pages = "87--95",
journal = "Dyes and Pigments",
issn = "0143-7208",
publisher = "Elsevier B.V.",
number = "1",
}