Haustein, Catherine’s team published research in Talanta in 36 | CAS: 2642-37-7

Haustein, Catherine published the artcileRoom-temperature phosphorescence of 3- and 5-substituted indoles, Safety of Potassium 1H-indol-3-yl sulfate, the publication is Talanta (1989), 36(11), 1065-8, database is CAplus and MEDLINE.

The room-temperature phosphorescence of indole and 13 substituted indoles on filter paper is reported. Cesium and iodide ions increase the emission intensity. In the presence of iodide, the excitation and emission wavelengths of indole are 279 and 440 nm, resp. The excitation and emission wavelengths of indoles with aliphatic groups in the 3-position are 288-289 and 443-449 nm, resp. Indoles with 3,5-substitution have excitation and emission wavelengths of 300-308 and 448-460 nm, resp. Indoxylsulfate and indoxyl-β-D-glucoside were the only indoles surveyed for which variations in the excitation and emission wavelengths depended on the heavy-atom ion present. These compounds had excitation wavelengths ranging from 288 to 388 nm, depending on which heavy-atom perturber was used. Emission wavelengths were 460-500 nm. Log-log plots of intensity vs. concentration were linear between 0.05 and 700 μg/mL for all the compounds studied, with detection limits in the nanogram range.

Talanta published new progress about 2642-37-7. 2642-37-7 belongs to indole-building-block, auxiliary class Indole,Salt,Sulfonate,Inhibitor,Inhibitor, name is Potassium 1H-indol-3-yl sulfate, and the molecular formula is C8H6KNO4S, Safety of Potassium 1H-indol-3-yl sulfate.

Referemce:
https://www.nature.com/articles/s41429-020-0333-2,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles