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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Mono- and dinuclear Ru(ii) complexes of 1,4-bis(3-(2-pyridyl)pyrazol-1- ylmethyl)benzene): Synthesis, structure, photophysical properties and electrochemiluminescent determination of diuretic furosemide
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Mono- and dinuclear Ru(ii) complexes of 1,4-bis(3-(2-pyridyl)pyrazol-1- ylmethyl)benzene): Synthesis, structure, photophysical properties and electrochemiluminescent determination of diuretic furosemide

机译：1,4-双（3-（2-（吡啶基）吡唑-1-基甲基）苯的单核和双核Ru（ii）配合物：利尿剂速尿的合成，结构，光物理性质和电化学发光测定

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摘要

Mononuclear ruthenium complex 1 and dinuclear complex 2 were synthesized by reaction of the appropriate bidentate pyrazolyl-pyridyl-based ligand L (L = 1,4-bis(3-(2-pyridyl)pyrazol-1-ylmethyl)benzene) with cis-Ru(bipy) _2Cl_2·2H_2O. They were characterized by elemental analyses, ESI-MS, 1H spectroscopy, and X-ray crystallography for 2. Compounds 1 and 2 both emit strongly in solid states and in solutions at 298 K with the lifetimes in the microsecond range. Electrogenerated chemiluminescence (ECL) of complexes 1 and 2 in the absence or presence of coreactant tri-n-propylamine (TPrA) or 2-(dibutylamino)ethanol (DBAE) at different working electrodes in acetonitrile and phosphate buffer solutions (PBS, pH 7.5) was studied. The ECL spectra are identical to the photoluminescence spectra, indicating that the ECL emissions are due to the metal to ligand charge transfer (MLCT). In all cases, ECL quantum efficiencies of dinuclear complex 2 are higher than those of mononuclear complex 1, and ECL quantum efficiencies of complexes 1 and 2/TPrA system are higher than those of DBAE system. It is noted that diuretic furosemide tends to decrease the ECL intensity of complex 2/TPrA system in PBS (pH 7.5) at GC working electrode. A novel ECL method for the determination of diuretic furosemide was developed with a linear range between 2.0 × 10~(-7) mol L~(-1) and 1.0 × 10~(-6) mol L~(-1), and a detection limit of 1.2 × 10~(-8) mol L~(-1) based on 3 times the ratio of signal-to-noise.
机译：单核钌配合物1和双核配合物2是通过适当的基于二齿吡唑基-吡啶基的配体L（L = 1,4-双（3-（2-吡啶基）吡唑-1-基甲基）苯）与顺式Ru（bipy）_2Cl_2·2H_2O。它们的特征在于元素分析，ESI-MS，1H光谱和2的X射线晶体学。化合物1和2均以298 K的固态和溶液形式强烈发射，其寿命在微秒范围内。在乙腈和磷酸盐缓冲溶液（PBS，pH 7.5）中在不同工作电极上不存在或不存在共反应物三正丙胺（TPrA）或2-（二丁基氨基）乙醇（DBAE）的情况下，配合物1和2的电化学发光（ECL） ）进行了研究。 ECL光谱与光致发光光谱相同，表明ECL发射是由于金属到配体的电荷转移（MLCT）引起的。在所有情况下，双核复合物2的ECL量子效率均高于单核复合物1的ECL量子效率，而复合物1和2 / TPrA系统的ECL量子效率高于DBAE系统。注意到利尿剂速尿倾向于降低GC工作电极上PBS（pH 7.5）中复杂的2 / TPrA系统的ECL强度。建立了测定利尿剂速尿的新的ECL方法，其线性范围为2.0×10〜（-7）mol L〜（-1）至1.0×10〜（-6）mol L〜（-1）。基于3倍信噪比的检测极限为1.2×10〜（-8）mol L〜（-1）。

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