As an important bridge between the micro and macro material world, chemistry is one of the main methods and means for humans to understand and transform the material world. In an article, author is Geue, JP, once mentioned the application of 98-68-0, Name is 4-Methoxybenzene-1-sulfonyl chloride, molecular formula is C7H7ClO3S, molecular weight is 206.6467, MDL number is MFCD00007446, category is thiomorpholine. Now introduce a scientific discovery about this category, Formula: C7H7ClO3S.
The formation of fluorescent alkali metal and alkaline earth complexes by 1-(2-{10-[2-piperazinoethyl]-9-anthryl}ethyl)piperazine and alkaline earth complexes by 4-(2-{10-[2-(1,4-thiazinan-4-yl)ethyl]-9-anthryl}ethyl)thiomorpholine in acetonitrile
The formation of fluorescent alkali metal and alkaline earth complexes of 1-(2-{10-[2-piperazinoethyl]9- anthryl} ethyl) piperazine ( 1) and alkaline earth complexes by 4-(2-{10-[2-(1,4-thiazinan-4-yl) ethyl]-9-anthryl} ethyl) thiomorpholine ( 2) in acetonitrile is reported. Both ( 1) and ( 2) have ‘fluorophore – spacer – receptor’ structures in the sequences ‘anthracene – dimethylene – piperazine’ and ‘anthracene – dimethylene – thiomorpholine’, respectively. Complexation by alkali metal ions and alkaline earth ions, Mm+, modulate photoinduced electron transfer ( PET) to increase the fluorescence of ( 1) and complexation of alkaline earth ions similarly increases the fluorescence of ( 2). The two receptors of ( 1) and ( 2) may either complex Mm+ singly to form [ML](m+) or cooperatively to form a ‘sandwich’ complex [ML’](m+) characterized together by complexation constant K-1 and quantum yield phi(1). They may also complex two Mm+ in [M2L](2m+) characterized by K-2 and phi(2). Typical data are exemplified for (1) and Mm+ = Na+ by K-1 = 1.33 x 10(5) dm(3) mol(-1) (phi(1) = 0.02) and K-2 = 4.20 x 10(2) dm(3) mol(-1) (phi(1) = 0.07), for (1) and Mm+ = Ca2+ by K-1 = 3.2 x 10(6) dm(3) mol(-1) (phi(1) = 0.34) and K-2 = 1.32 x 10(4) dm(3) mol(-1) (phi(2) = 0.54), and for (2) and Mm+ = Ca2+ by K-1 = 2.29 x 10(4) dm(3) mol(-1) (phi(1) = 0.20) and K-2 = 8.0 x 10(2) dm(3) mol(-1) (phi(2) = 0.57) at 298.2 K and I = 0.05 mol dm(-3) (NEt4ClO4). These data are compared with those for the alkaline earth complexes of 4-{2-[10-(2-morpholinoethyl)-9-anthryl] ethyl} morpholine. In 40 : 60 (v/v) 1,4-dioxan/water, protonation modulates PET to increase the fluorescence of (1) H-4(4+) and ( 2) H-2(2+). (The pK(a) values of (1) H-4(4+) are 9.02, 8.06, 4.32, and 2.96 at 298.2 K and I = 0.05 mol dm(-3) (NEt4ClO4).) The syntheses of (1) and (2) are reported.
Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. A catalyst, therefore, does not appear in the overall stoichiometry of the reaction it catalyzes.I hope my blog about 98-68-0 is helpful to your research. Formula: C7H7ClO3S.
Reference:
Thiomorpholine – Wikipedia,
,Thiomorpholine | C4H9NS – PubChem