Azaindole-1,2,3-triazole conjugate as selective fluorometric sensor for dihydrogen phosphate was written by Ghosh, Kumaresh;Kar, Debasis;Joardar, Soumen;Sahu, Debashis;Ganguly, Bishwajit. And the article was included in RSC Advances in 2013.Reference of 1227270-32-7 This article mentions the following:
A new receptor was designed and synthesized. The open cavity of triazole-pyrrolo[2,3-b]pyridine dimer selectively recognizes H2PO4– over a series of other anions in CH3CN containing 0.01% DMSO by exhibiting a ratiometric change in emission. In sensing, the cooperativity of the aza indoles in triazole-pyrrolo[2,3-b]pyridine dimer has been proved using a model compound Also the interaction behavior of the nitrogen in the azaindole has been proved by considering triazole-indole dimer, which did not show any discrimination towards the anions. Binding studies were carried out using fluorescence, UV-vis, 1H-NMR and 31P-NMR spectroscopic techniques. The title compounds thus formed included a triazole aza-indole derivative (I) triazole-pyrrolo[2,3-b]pyridine dimer and related substances, such as triazole-indole dimer derivatives The synthesis of the target compound was achieved by a reaction of 1,3-bis(azidomethyl)benzene with (ethynyl)pyrrolo[2,3-b]pyridine. In the experiment, the researchers used many compounds, for example, 2-Iodo-1H-pyrrolo[2,3-b]pyridine (cas: 1227270-32-7Reference of 1227270-32-7).
2-Iodo-1H-pyrrolo[2,3-b]pyridine (cas: 1227270-32-7) belongs to iodide derivatives. Organoiodine compounds occur widely in organic chemistry, but are relatively rare in nature. The C閳ユ彂 bond is the weakest of the carbon閳ユ従alogen bonds. These bond strengths correlate with the electronegativity of the halogen, decreasing in the order F > Cl > Br > I. This periodic order also follows the atomic radius of halogens and the length of the carbon-halogen bond.Reference of 1227270-32-7
Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com