Akademik Veri Yönetim Sistemi
Inorganic Chemistry Communications, cilt.189, sa.P1, 2026 (SCI-Expanded, Scopus)
A novel fluorescent sensor based on methoxyphenyl-carbazole-dicyanovinyl structure (D-π-D-A), namely probe A, was designed and synthesized in five steps starting from carbazole for the selective detection of cyanide ions (CN−). The photophysical properties of probe A were systematically investigated in fifteen different solvent systems to evaluate the influence of solvent polarity on its optical behaviour. The probe exhibited two characteristic absorption bands corresponding to ligand centered and intramolecular charge transfer (ICT) transitions, along with a broad emission band centered at 538 nm. Among the tested solvents, probe A showed the highest fluorescence intensity in THF, with a Stokes shift of 124 nm and a quantum yield of 24%. In addition, probe A displayed excellent selectivity and sensitivity toward CN− through a 1,4-nucleophilic addition mechanism. Binding ratio and mechanism were confirmed by Job's plot analysis and 1H NMR, which indicated a 1:1 binding stoichiometry. The limit of detection (LOD) was calculated to be 54.8 nM, outperforming many previously reported carbazole-based CN− sensors. Furthermore, interference and real-sample recovery experiments demonstrated the probe's high reliability and practical applicability, establishing probe A as a promising fluorescent sensor for CN-− detection in environmental and analytical applications.