A new tetra triazole functionalized calixresorcinarene macrocycle (5) is synthesized
and utilized for the detection of copper ions in the aqueous medium. The photophysical
potential of compound (5) is examined by a range of cations (Ba2+, Ca2+, Co2+,
Hg2+, K+, Mg2+, Mn2+, Na+, NH4
+ and Pd2+). The triazole based calixresorcinarene macrocycle
(5) has interacted with Cu2+ ion in preference of other cations. A significant
quenching has been observed after the addition of 15 μM Cu2+ ion solution, which produced
4.2 folds drift in the absorption intensity of compound (5). Tetra triazole functionalized
calixresorcinarene macrocycle showed high selectivity towards copper ion chemosensing
without any interference in competitive studies. The pH studies of compound
(5) with Cu2+ indicated the maximum chelation between 7- 7.5 pH. The compound (5) is
capable to recognize Cu2+ at 1 μM detectable limit. Copper ion was detected in tap water with 15 μM concentration.
Job’s plot showed 1:2 binding ratio between macrocycle (5) and Cu2+.