AGGREGATION OF TWO DIRECT DYE DERIVED FROM 4,4'-DIAMINOSTILBENE-2,2'-DISULPHONIC ACID. SPECTROSCOPIC AND MATHEMATICAL STUDIES

1 Institute of Chemistry Timisoara of Romanian Academy, B-dul Mihai Viteazul 24, 300223 Timisoara, Romania
2 University of Medicine and Pharmacy “V. Babeş” Timişoara, Faculty of Pharmacy, Eftimie Murgu 2, 300041 Timişoara, Romania
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