A High Selective Chemiluminescent Probe Derived from Iso-luminol Enabling High Sensitive Determination of Ferrous Ions in the Environmental Waters,Chinese Journal of Chemistry

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A High Selective Chemiluminescent Probe Derived from Iso-luminol Enabling High Sensitive Determination of Ferrous Ions in the Environmental Waters
Chinese Journal of Chemistry ( IF 5.5 ) Pub Date : 2021-07-08 , DOI: 10.1002/cjoc.202100057
Shenghai Zhang _{1,

2} , Yalin Shi ₁ , Jiawang Deng ₁ , Jidong Zhang ₁ , Mengqi Cheng ₂ , Geting Yu ₂

Affiliation

A new chemiluminescence (CL) reagent named 4-amino-5-thiocyanato-phthalyl-hydrazine (iso-luminol-SCN) is synthesized by the bromide-mediated substitution reaction of iso-luminol with sodium thiocyanate in dimethyl formamide (DMF) at room temperature. Strong CL is observed for iso-luminol-SCN oxidized by hydrogen peroxide (H₂O₂) in the presence of Fe²⁺, with the CL intensity strongly depending on the concentration of Fe²⁺ and being hardly interferred by other common metal ions. Based on this fact, a flow injection CL method is established for the high sensitive and selective determination of Fe²⁺. The CL intensity was linearly correlated with the concentration of Fe²⁺ in the range of 1.0 × 10^–8 mol·L^–1 to 1.0 × 10^–5 mol·L^–1 following the equation CL_net = 166.3c + 57.7 (c, ×10^–6 mol·L^–1; n = 7; R² = 0.9988). The detection limit is calculated to be 3.2 × 10^–9 mol·L^–1 Fe²⁺ based on the 3S₀/K principle. The relative standard deviation (RSD) was 3.7% for 1.0 × 10^–6 mol·L^–1 Fe²⁺ (n = 11), a support for the precision of Fe²⁺ measurement. The recoveries of Fe²⁺ were obtained in the range of 98.8%—101.6% in three real water samples, showing the applicability and reliability by the proposed method. The possible CL mechanism is proposed based on the kinetic characteristic of the CL reaction and the CL spectrum.

中文翻译：

源自异鲁米诺的高选择性化学发光探针可实现环境水中亚铁离子的高灵敏度测定

通过溴化物介导的异鲁米诺与硫氰酸钠在二甲基甲酰胺 (DMF) 中的溴化取代反应合成了一种名为 4-氨基-5-硫氰酸根合-邻苯二甲酰肼 ( iso -luminol-SCN)的新型化学发光 (CL) 试剂温度。Fe ²⁺存在下过氧化氢 (H ₂ O ₂ )氧化异-鲁米诺-SCN观察到强 CL ，CL 强度强烈依赖于 Fe ²⁺的浓度，几乎不受其他常见金属离子的干扰. 基于此，建立了流动注射CL法用于Fe ²⁺的高灵敏度和选择性测定。. CL 强度在 1.0 × 10 ^–8 mol·L ^–1到 1.0 × 10 ^–5 mol·L ^–1范围内与 Fe ²⁺的浓度呈线性相关，公式 CL _net = 166.3 c + 57.7 ( c , ×10 ^–6 mol·L ^–1；n = 7；R ² = 0.9988)。根据 3S ₀ /K 原理，检测限计算为 3.2 × 10 ^–9 mol·L ^–1 Fe ²⁺。1.0 × 10 ^–6 mol·L ^–1的相对标准偏差 (RSD) 为 3.7%Fe ²⁺ ( n = 11)，Fe ²⁺测量精度的支持。三个真实水样中Fe ²⁺的回收率均在98.8%～101.6%之间，表明该方法的适用性和可靠性。基于CL反应的动力学特征和CL谱提出了可能的CL机理。

更新日期：2021-07-08

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