Bertrand, Didier et al. published their research in Bull. soc. chim. in 1945 | CAS: 142-64-3

Piperazine Dihydrochloride (cas: 142-64-3) belongs to piperazine derivatives. Piperazine belongs to the family of medicines called anthelmintics. Piperazines are very broad chemical group, covering a wide range of drugs from antidepressants to antihistamines. The connecting property of all these chemicals is the presence of a piperazine functional group.Electric Literature of C4H12Cl2N2

Visible fluorescence and chemical structure. III. Double-bond nitrogen compounds and amine hydrochlorides was written by Bertrand, Didier. And the article was included in Bull. soc. chim. in 1945.Electric Literature of C4H12Cl2N2 This article mentions the following:

The double-bond N gives a fluorescence spectrum radically different from those of the amines and anilines studied. The effect of HCl is frequently to alter the intensity but not the shape of the spectral curve of the base. Fluorescence spectra are given for pyridine, quinoline, isoquinoline, acridine, N-benzylidenebenzylamine, N-heptylidenebenzylamine, and the hydrochlorides of pyridine, quinoline, isoquinoline, acridine, N-benzylideneaniline, N-benzylidenebenzylamine, N-benzylidene-β-naphthylamine, β-naphthylamine, carbazole, piperazine, PhNHEt, PhNEt2, 2-phenylethylamine, tetrahydroquinoline, and tetrahydroisoquinoline. In the experiment, the researchers used many compounds, for example, Piperazine Dihydrochloride (cas: 142-64-3Electric Literature of C4H12Cl2N2).

Piperazine Dihydrochloride (cas: 142-64-3) belongs to piperazine derivatives. Piperazine belongs to the family of medicines called anthelmintics. Piperazines are very broad chemical group, covering a wide range of drugs from antidepressants to antihistamines. The connecting property of all these chemicals is the presence of a piperazine functional group.Electric Literature of C4H12Cl2N2

Referemce:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics