Possible Interaction: Leucine and Zinc Cation

“The fluorescence enhancement of L is attributed to the 1:1 complex formation between L and Zn(II ), which has been utilized as the basis for selective detection of Zn(II).”

“… L) … Zn(II) salts (sulfate, nitrate, chloride or acetate) led to the formation of the complexes [Zn(2)(mu-O(2)SO(2))(2)L(2)(CH(…)(2)L] (4) which were characterized by IR, (1)H NMR and fluorescence spectroscopies, elemental analysis and single crystal X-ray diffraction.”

“The … of L can be significantly … presence of Zn2+via two pathways, one is the fluorescence resonance energy transfer (FRET) effect by ratiometric response at an excitation wavelength of 290 … other is the chelation enhanced fluorescence (CHEF) effect by turn-on response at an excitation wavelength of 330 nm.”

“The strong and selective coordination of L with metal ions ( Zn2+ , Cu2+ and Fe3+) separates the NTPC from the AgNPs surface that turn-on the NTPC fluorescence.”

“On excitation by light of wavelength 350 nm, L exhibited a fluorescent peak at λmax = 454 nm, which showed ca 6 times enhancement in intensity with a blue shift on interaction with Zn2+.”