The addition of Cr3+ to amixture of PB and other competitivemetal ionsmentioned above in a THF:H2O (1:1) solution led to a significant fluorescence intensity decrease (Fig. 5).
The addition of Cr3+ toamixture of PB and other competitivemetal ionsmentioned above in aTHF:H2O (1:1) solution led to a significant fluorescence intensity decrease(Fig. 5).