LUMINESCENCE-BASED SENSORS - MICROHETEROGENEOUS AND TEMPERATURE EFFECTS
LUMINESCENCE-BASED SENSORS - MICROHETEROGENEOUS AND TEMPERATURE EFFECTS
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DOI：
10.1016/0925-4005(93)85236-4
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发表时间：
1993-03-01
影响因子：
8.4
通讯作者：
DEGRAFF, BA
中科院分区：
文献类型：
--
作者：
DEMAS, JN;DEGRAFF, BA
O2、pH和PCO2远程光学传感器的许多最新进展都是基于发光型传感器。有机探针和过渡金属络合物均可用于无机或有机聚合物载体。聚合物体系通常是高度微观非均相的，并且对发光、猝灭和光化学有很大影响。这种复杂性给正确解释和纠正传感器行为带来了相当大的困难。深入了解传感器与环境的相互作用，特别是微观异质性的作用，对于合理设计新的高性能传感器/探头至关重要。我们讨论了异质性的不同模型，并展示了建立唯一准确模型的惊人难度。讨论了不同的模型，它们在传感器响应中的差异，唯一性问题的严重性，以及如何区分模型。此外，对于新型无机传感器，温度效应可能会对性能产生不利影响。探索了这些效应的起源和必须控制的必要参数，以便在传感器中最好地利用它们。
Many recent advances in remote optical sensors of O2, pH, and PCO2 are based on luminescence-type sensors. Both organic probes and transition-metal complexes are used on inorganic or organic polymer supports. Polymer systems are generally highly microheterogeneous and substantially affect the luminescence, quenching, and photochemistry. This complexity causes considerable difficulty in properly interpreting and correcting sensor behavior. Intimate understanding of the sensor-environment interactions and, especially, the role of microheterogeneity is critical for the rational design of new high-performance sensors/probes. We discuss different models for heterogeneity and demonstrate the surprising difficulty in establishing unique accurate models. The different models, their differences in sensor response, the magnitude of the uniqueness problem, and how to differentiate between models are discussed. In addition, for the new classes of inorganic sensors, temperature effects can adversely affect performance. The origins of these effects and the necessary parameters that must be controlled to best exploit them as sensors are explored.