Abnormal Behavior in Stern-Volmer Luminescence Quenching Measurements via Apparent Lifetime Methods

被引：2

作者：

Payne, Sarah J. ^{[1
]}

Demas, J. N. ^{[1
]}

DeGraff, B. A. ^{[2
]}

机构：

[1] Univ Virginia, Dept Chem, Charlottesville, VA 22904 USA

[2] James Madison Univ, Harrisonburg, VA 22807 USA

来源：

APPLIED SPECTROSCOPY | 2009年 / 63卷 / 04期

基金：

美国国家科学基金会;

关键词：

Stern-Volmer quenching; Artifacts; Anti-quenching; Luminescence; ERROR ANALYSIS; EXPONENTIAL DECAYS; SENSORS; COMPLEXES;

D O I：

10.1366/000370209787944307

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Luminescence lifelines are widely used as an analysis tool. Since decays in analytical systems are frequently complex decays rather than single exponentials. apparent lifetime methods based on the rapid lifetime determination (RLD) method or single frequency phase shift (SFPS) measurements are frequently, used to reduce cost and simplify data analysis. It is demonstrated here that these methods can produce large errors under the right conditions. Both methods call give unexpected and uncharacteristic Stern-Volmer quenching plots (SVQPs) in two-component systems. Behaviors include bimodal quenching curves as well as "anti-quenching" curves. These phenomena are exacerbated by small fractions of long unquenched components.

引用

页码：437 / 441

页数：5

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