Department of Chemistry, Gauhati University, Guwahati, Assam, India.
J Fluoresc. 2013 May;23(3):503-8. doi: 10.1007/s10895-013-1167-0. Epub 2013 Feb 14.
The fluorescence intensity of salicylaldehyde phenylhydrazone (L), in 1:1 (v/v) CH3OH:H2O was enhanced by ca. 100 times with a blue shift in emission maximum, on interaction with Pb(2+) ion. No enhancement in fluorescent intensity of L was observed on interaction with metal ions - Na(+), K(+), Ca(2+), Cu(2+), Ni(2+), Zn(2+), Cd(2+) and Hg(2+). This signal transduction was found to occur via photoinduced electron transfer (PET) mechanism. A 1:1 complexation between Pb(2+) and L with log β = 7.86 has been proved from fluorescent and UV/Visible spectroscopic data. The detection limit of Pb(2+) was calculated to be 6.3 × 10(-7) M.
水杨醛苯腙（L）在 1:1（v/v）甲醇：H2O 中的荧光强度在与 Pb(2+)离子相互作用时增强了约 100 倍，发射最大值发生蓝移。L 与金属离子 - Na(+)、K(+)、Ca(2+)、Cu(2+)、Ni(2+)、Zn(2+)、Cd(2+)和 Hg(2+)相互作用时，荧光强度没有增强。这种信号转导是通过光诱导电子转移（PET）机制发生的。荧光和紫外/可见光谱数据证明了 Pb(2+)与 L 之间以 1:1 配位形成的络合物的对数β为 7.86。Pb(2+)的检测限计算为 6.3×10(-7) M。
