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首页> 外文OA文献 >Influence of substituent and ligand electronic factors on the measurement of gas phase olefins using a surface acoustic wave oscillator coated with trans-PtCl2(olefin)(amine) complexes
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Influence of substituent and ligand electronic factors on the measurement of gas phase olefins using a surface acoustic wave oscillator coated with trans-PtCl2(olefin)(amine) complexes

机译：取代基和配体电子因素对涂有反式ptCl2（烯烃）（胺）配合物的表面声波振荡器测量气相烯烃的影响

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摘要

Certain olefin gases and vapors can be measured selectively at low concentrations using surface acoustic wave (SAW) sensors coated with reagents of the general formula trans-PtCl2(olefin)(amine). The sensor response depends on the steady-state rate of mass change associated with substitution of the initially complexed olefin by the free olefin analyte. This paper examines the effects of changes in the electronic nature of substituents on the free olefin and the olefin and amine ligands in the complex on the sensitivity and selectivity obtained with this class of SAW sensor coatings. For a given reagent, higher reaction rates are generally observed with electron-donating substituents on the double bond of the free olefin. For a given free olefin, varying the 4-substituent of the pyridine ligand in PtCl2(ethylene)(4-X-pyridine) gives a maximum response at an intermediate degree of amine basicity. Replacing pyridine by aniline, pyridine N-oxide or the 4-substituted derivatives of these ligands results in reduced responses for the olefins tested. Changing the initially complexed olefin leads to large changes in response, the pattern of which varies with the nature of the free olefin. Results demonstrate the potential for controlling the response of SAW sensors through subtle structural modifications of these coating reagents.
机译：可以在使用涂覆有通式Trans-PTCl2（烯烃）的试剂（胺）的试剂的表面声波（锯）传感器以低浓度选择性地测量某些烯烃气体和蒸气。传感器响应取决于通过游离烯烃分析物取代最初络合物烯烃的稳态质量变化率。本文研究了在络合物中，在复合物中的烯烃和烯烃和胺配体上的蛋白质和胺配体的变化的影响。用这类SAW传感器涂层获得的敏感性和选择性。对于给定的试剂，通常在游离烯烃的双键上用电子提供的取代基观察到更高的反应速率。对于给定的游离烯烃，改变PtCl 2（乙烯）（乙烯）（4- X-吡啶）中的吡啶配体的4-取代基在胺碱度的中间程度上给出最大响应。通过苯胺，吡啶N-氧化物或这些配体的4取代衍生物替换吡啶导致测试的烯烃的反应降低。改变最初复合的烯烃导致响应的大变化，其模式随着游离烯烃的性质而变化。结果证明了通过这些涂料试剂的微妙结构改性来控制SAW传感器响应的可能性。

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