(Z)-2-(4-methoxybenzylideneamino)-3-phenylpropanoic acid (L) synthesized by condensation of p-anisaldehyde and L-phenylalanine acts as selective fluorescent as well as voltammetric sensor for Cu²⁺ in 2:1 (v/v) CH₃OH:H₂O. The fluorescence intensity of L (λ_max 425 nm) is quenched ca. 65% by Cu²⁺. Metal ions - Li⁺, Na⁺, K⁺, Al³⁺, Cu²⁺, Zn²⁺, Cd²⁺, Hg²⁺, Mn²⁺, Ni²⁺ and Pb²⁺ do not interfere. The binding constant and the detection limits were calculated to be 0.56 × 10² M⁻¹ and 10⁻⁶ M respectively. DFT and TDDFT calculations confirmed 2:1 binding stoichiometry between L and Cu²⁺ obtained from fluorescence data. The interaction between L and Cu²⁺ is reversible for many cycles with respect to ethylenediamine tetraacetate anion (EDTA²⁻) which results in IMPLICATION logic gate.

对苯甲醛和L-苯丙氨酸缩合合成的（Z）-2-（4-甲氧基亚苄基氨基）-3-苯基丙酸（L）作为Cu ²⁺在2：1（v / v）CH ₃ OH：H ₂的O的荧光强度大号（λ_最大425nm的）淬灭CA。Cu ²⁺占65％。金属离子-Li ⁺，Na ⁺，K ⁺，Al ³⁺，Cu 2 ⁺，Zn 2 ⁺，Cd 2 ⁺，Hg 2 ⁺，Mn 2 ⁺，Ni ²⁺和Pb ²⁺不干扰。结合常数和检测极限分别计算为0.56×10 ²  M ^-1和10 ^-6M  。DFT和TDDFT计算证实了从荧光数据获得的L和Cu ²⁺之间的2：1结合化学计量。相对于乙二胺四乙酸根阴离子（EDTA ^2-），L与Cu ²⁺之间的相互作用可逆多个循环，从而产生IMPLICATION逻辑门。