Solvatochromism of 1-(p-Aminostyryl)pyridium Salts

• Autorzy: Gawinecki R. , Trzebiatowska K.
• Języki publikacji: EN

Abstrakty

EN

Solvatochromism of eighteen 1-methyl-(p-aminostyryl)pyridinium perchlorates was studied. For each solvent the V~ max values follow the R o substituent constants of the amino groups present in the molecule. The V~ max values for compounds are usually highest and lowest in water and in methylene chloride, respectively. The substituent bathochromic shifts in some solvents are as large as 5700 cm-1. No inverted solvatochromism is observed. Analysis of the spectra do not confirm also this effect to be negative. Dependence between the band position and solvent polarity, hydrogen bond donor acidity and hydrogen bond acceptor basicity is of low quality. There is no simple relationship between the V~ max values and the solvent dielectric constants.

Słowa kluczowe

EN

1-methyl-(p-aminostyryl)pyridinium salts; solvatochromism; substituent effect

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2001
• Tom: Vol. 75, nr 2
• Strony: 231--239
• Opis fizyczny: Bibliogr. 31 poz., rys.

Twórcy

autor

Gawinecki R.

• Department of Chemistry, Technical and Agricultural University, Seminaryjna 3, PL-85-326 Bydgoszcz, Poland

autor

Trzebiatowska K.

• Department of Chemistry, Technical and Agricultural University, Seminaryjna 3, PL-85-326 Bydgoszcz, Poland

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