Designing of chemo-sensors is a new scope of intrigue among researchers. After inspecting the beneficial and harmful effects of Sn(II) metal ions in living species, 1,2,3-Triazole based chemo-sensor 4 a have been synthesized via click route. In the current article, literarily new 1,2,3-Triazoles (4 a-4 d) have been synthesized and identified via various spectroscopic means such as NMR( 1 H & 13 C), IR and mass spectrometry. Triazole 4 a was explored for recognition properties via absorption and emission spectroscopy and found specific and selective for Sn(II) metal ions. The recognition of Sn 2 + metal ions by probe 4a was not interfered because of other tested metal cations. The probe has very low detection limit of 0.47 × 10 À 7 M and 3.8 × 10 À 9 M via ultraviolet and fluorescence spectroscopy respectively which is lower than many previously reported sensors. The BÀ H plot and stern volmer's plot confirmed a high binding affinity between probe 4a and tin (II) metal ion. The association constant (K a ) and stern volmer constant (K sv ) were calculated as 13.36 × 10 5 M À 1 and 12.6 × 10 6 M À 1 from BÀ H plot and stern volmer's plot respectively. The Stoichiometric ratio between chemo-sensor 4 a and Sn 2 + metal ions was confirmed as 1 : 1 by the job's plot. Moreover, in this study, the synthesized compounds 4(a-d) were examined for their antioxidant properties. The total antioxidant activity (TAA) results indicate that the synthesized triazoles 4(a-d) found to be excellent postulant for radical scavenging. TAA values for 4 a, 4 b, 4 c and 4 d are found to be 4.65 � 0.2, 6.79 � 0.3, 6.29 � 0.2, 5.06 � 0.1 (mM)(eq. ascorbic acid) per 100 mM of particle respectively.