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Synthesis and Photophysical Properties of 5-Methoxy-naphtho[1,2-d]thiazole-2-carboxylic Acid

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1TitleTitle of DocumentSynthesis and Photophysical Properties of 5-Methoxy-naphtho[1,2-d]thiazole-2-carboxylic Acid
2CreatorAuthor's name, affiliation, country J. RAMCHANDER
Department of Chemistry, Nizam College, Osmania University, Hyderabad, Telangana State-500001, India
3SubjectDicipline(s) Chemical Science
3SubjectKeywords 4-Methoxynaphthyl amine, Naphthothiazole, Solvatochromism, Stokes shift, Fluorophore
4DescriptionAbstract Synthesis of 5-methoxynaphtho[1, 2-d]thiazole-2-carboxylic acid was developed from new synthetic route starting from using potassium ferricyanide as catalyst. The absorption and fluorescence properties of structurally related 4-methoxynaphthalene-1-ylamine (4), N-(4-methoxynaphthalene-1-yl)-oxalamic acid ethyl ester (5), 2-(4-methoxynaphthalene-1-ylamino)-2-thioxoacetic acid (6) and 5-methoxynaphtho[1,2-d]thiazole-2-carboxylic acid (7) were investigated in 4 different solvents. The absorption maxima of these compounds (except 7) in the order C6H6 > cyclohexane >MeOH>EtOH+HCl. The spectral characteristics are solvent and compound specific. Fluorophores with electron withdrawing group have larger fluorescence quantum yields and greater solvatochromism than the compounds with electron donating groups. Protic solvents yielded higher fluorescence quantum efficiency. While no such relationship exists between the latter and electronic absorption maxima, fluorescence emission maxima, fluorescence quantum efficiency and Stokes shift.
5PublishersOrganizing agency, location WWW Publications, India
6Contributor Sponsor(s) -
7DateDate (YYYY-MM-DD) -
8TypeStatus & genre Peer-reviewed Article
8TypeType
9FormateFile Formate PDF
10IdentifierUniform Resource Identifier Click Here
10IdentifierDigital Object Identifier
11SourceJournal/conference title; vol., no. (Year)Chemical Science Transactions, Volume  6 , Number  (1), (2017)
12LanuguageEnglish=en en
13RelationSupp.files
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