Formula: C8H10ClNO3. I found the field of Chemistry very interesting. Saw the article A 1,8-naphthalimide-pyridoxal conjugate as a supramolecular gelator for colorimetric read out of F- ions in solution, gel and solid states published in 2019.0, Reprint Addresses Ghosh, K (corresponding author), Univ Kalyani, Dept Chem, Kalyani 741235, W Bengal, India.. The CAS is 65-22-5. Through research, I have a further understanding and discovery of 3-Hydroxy-5-(hydroxymethyl)-2-methylisonicotinaldehyde hydrochloride.
A naphthalimide-pyridoxal conjugate 1 has been designed and synthesized. Compound 1 forms a stable greenish yellow colored gel in DMSO:H2O (8:1 v/v). Rheological study reveals that the gel is mechanically strong (G> G) over a wide range of applied strains. The morphology of the gel as determined by FESEM shows a highly cross-linked fibrous network. The gel is anion-responsive and is selectively transformed into a sol with a color change from greenish yellow to deep blue only in the presence of F- among other anions. In CH3CN, compound 1 was also sensitive to basic anions such as F- and AcO- ions. In solution, F- was differentiated from AcO- through a color change. While the yellow colored solution of 1 in acetonitrile was changed into deep blue in the presence of F-, AcO- ions gave a faint blue coloration. A similar colorimetric differentiation of F- from AcO- has been possible in CH3CN by a reusable Schiff base-linked Merrifield resin 1a or 1b.
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Reference:
Pyridine – Wikipedia,
,Pyridine | C5H5N – PubChem