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Furthermore, density functional theory (DFT) and single crystal X\u2010ray diffraction (SCXRD) techniques revealed the inclusion of \u201csoft\u201d Tellurium (Te) and \u201chard\u201d Nitrogen (N), Oxygen (O) atoms in the molecular frameworks. Owing to the presence of electron rich \u201cN\u201d and \u201cO\u201d atoms along with \u201cTe\u201d in the molecular framework, <jats:bold>1<\/jats:bold> could efficiently and selectively sense PA with more than 80\u2009% fluorescence quenching efficiency in organic medium and having detection limit of 4.60\u2005<jats:italic>\u03bcM<\/jats:italic>. The selective detection of PA compared to other nitro\u2010explosives follows a multi\u2010mechanism based \u201cturn\u2010off\u201d sensing which includes photo\u2010induced electron transfer (PET), electrostatic (\u03c0\u2010\u03c0 stacking and \u03c0\u2010anion\/cation) interaction, intermolecular hydrogen bonding and inner filter effect (IFE). 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