In this work, we synthesized metal (Au, Ag or Cu)–based nanoclusters (NCs) with different photoluminescence (PL) properties and investigated their application for the specific detection of heavy metal ions in water samples. Bovine serum albumin (BSA) and thiosalicylic acid (TSA) acted as protecting ligands for the synthesis of metallic NCs (MNCs). The as–prepared TSA/BSA–Au NCs, TSA/BSA–Ag NCs and TSA/BSA–Cu NCs exhibit PL emission at 700, 624, and 430 nm, with average lifetimes of 1540, 30.9, and 11.7 ns, respectively, when excited at 350 nm. MNCs has a metal core and metal–thiolate shell, where shell species are Au₃₈–SR₂₄, Ag₉–SR₇ and Cu_3–14–SR_m in the TSA/BSA–Au NCs, TSA/BSA–Ag NCs, and TSA/BSA–Cu NCs, respectively. PL quenching of MNCs induced through metallophilic interaction, metal–thiol complexation and/or inner filter effect, which enables the quantitation of Hg²⁺, As³⁺, and Cr⁶⁺ ions, with linear ranges of 1–350, 1–20, and 50–400 nM, and with limits of detection of 0.25, 0.34 and 3.54 nM, respectively. The TSA/BSA–Au NCs, TSA/BSA–Ag NCs, and TSA/BSA–Cu NCs probe systems exhibit the advantages of simplicity, rapidity, selectivity, sensitivity, and practicality for the quantitation of metal ions in water samples.

在这项工作中，我们合成了具有不同光致发光（PL）特性的基于金属（金，银或铜）的纳米团簇（NC），并研究了它们在水样中重金属离子特异性检测中的应用。牛血清白蛋白（BSA）和硫代水杨酸（TSA）充当金属NCs（MNCs）合成的保护性配体。所制备的TSA / BSA-Au NC，TSA / BSA-Ag NC和TSA / BSA-Cu NC在700、624和430 nm处显示PL发射，平均寿命分别为1540、30.9和11.7 ns，在350 nm激发时。跨国公司拥有金属核和金属硫醇盐壳，其中壳种为Au ₃₈ –SR ₂₄，Ag ₉ –SR ₇和Cu _3-14 –SR _m在TSA / BSA–Au NC，TSA / BSA–Ag NC和TSA / BSA–Cu NC中分别存在。通过嗜金属相互作用，金属-硫醇络合和/或内部过滤作用诱导的MNC的PL猝灭，可定量Hg 2 ⁺，As ³⁺和Cr ⁶⁺离子，线性范围为1–350、1–20 ，和50–400 nM，检测限分别为0.25、0.34和3.54 nM。TSA / BSA–Au NC，TSA / BSA–Ag NC和TSA / BSA–Cu NC探针系统具有简单，快速，选择性，灵敏和实用的优点，可用于定量分析水中的金属离子。