Effects of excitation power density on the Stern–Volmer constant measurement

Meng Kou; Feng Qin; Yongda Wang; Xiyu Zhang; Lu Li; Zheng Hu; Hua Zhao; Zhiguo Zhang

doi:10.1364/OL.503390

Effects of excitation power density on the Stern–Volmer constant measurement

Meng Kou
, Feng Qin
, Yongda Wang
, Xiyu Zhang
, Lu Li
, Zheng Hu
, Hua Zhao
, Zhiguo Zhang^*

^*Corresponding author for this work

School of Physics, Harbin Institute of Technology
Harbin Institute of Technology
Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

The Stern–Volmer constant (K_SV) is an important parameter to describe the capability of energy transfer to oxygen for porphyrin and its derivatives. By fitting Stern–Volmer equation, I_P0/I_P = 1 + K_SV[O₂], the K_SV is generally determined through phosphorescence intensities (I_P) under aerobic and oxygen-free conditions. In this work, the effect of excitation power density on the K_SV measurement is theoretically analyzed and experimentally studied, using palladium octaethylporphyrin (PdOEP) as an example. The I_P of PdOEP increased nonlinearly with excitation power density, and the power dependent slope of I_P0/I_P could be obtained. By way of the functional relationship between the slope of I_P0/I_P and power density, the real K_SV of PdOEP was fitted to be 58 ± 2 kPa⁻¹. The oxygen-dependent phosphorescence lifetimes (τ_P) and I_P under a weak excitation power are also measured to calculate the real K_SV, which verifies our analysis.

Original language	English
Pages (from-to)	5133-5136
Number of pages	4
Journal	Optics Letters
Volume	48
Issue number	19
DOIs	https://doi.org/10.1364/OL.503390
State	Published - Oct 2023
Externally published	Yes

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title = "Effects of excitation power density on the Stern–Volmer constant measurement",

abstract = "The Stern–Volmer constant (KSV) is an important parameter to describe the capability of energy transfer to oxygen for porphyrin and its derivatives. By fitting Stern–Volmer equation, IP0/IP = 1 + KSV[O2], the KSV is generally determined through phosphorescence intensities (IP) under aerobic and oxygen-free conditions. In this work, the effect of excitation power density on the KSV measurement is theoretically analyzed and experimentally studied, using palladium octaethylporphyrin (PdOEP) as an example. The IP of PdOEP increased nonlinearly with excitation power density, and the power dependent slope of IP0/IP could be obtained. By way of the functional relationship between the slope of IP0/IP and power density, the real KSV of PdOEP was fitted to be 58 ± 2 kPa−1. The oxygen-dependent phosphorescence lifetimes (τP) and IP under a weak excitation power are also measured to calculate the real KSV, which verifies our analysis.",

author = "Meng Kou and Feng Qin and Yongda Wang and Xiyu Zhang and Lu Li and Zheng Hu and Hua Zhao and Zhiguo Zhang",

note = "Publisher Copyright: {\textcopyright} 2023 Optica Publishing Group.",

year = "2023",

month = oct,

doi = "10.1364/OL.503390",

language = "英语",

volume = "48",

pages = "5133--5136",

journal = "Optics Letters",

issn = "0146-9592",

publisher = "Optica Publishing Group (formerly OSA)",

number = "19",

}

TY - JOUR

T1 - Effects of excitation power density on the Stern–Volmer constant measurement

AU - Kou, Meng

AU - Qin, Feng

AU - Wang, Yongda

AU - Zhang, Xiyu

AU - Li, Lu

AU - Hu, Zheng

AU - Zhao, Hua

AU - Zhang, Zhiguo

PY - 2023/10

Y1 - 2023/10

N2 - The Stern–Volmer constant (KSV) is an important parameter to describe the capability of energy transfer to oxygen for porphyrin and its derivatives. By fitting Stern–Volmer equation, IP0/IP = 1 + KSV[O2], the KSV is generally determined through phosphorescence intensities (IP) under aerobic and oxygen-free conditions. In this work, the effect of excitation power density on the KSV measurement is theoretically analyzed and experimentally studied, using palladium octaethylporphyrin (PdOEP) as an example. The IP of PdOEP increased nonlinearly with excitation power density, and the power dependent slope of IP0/IP could be obtained. By way of the functional relationship between the slope of IP0/IP and power density, the real KSV of PdOEP was fitted to be 58 ± 2 kPa−1. The oxygen-dependent phosphorescence lifetimes (τP) and IP under a weak excitation power are also measured to calculate the real KSV, which verifies our analysis.

AB - The Stern–Volmer constant (KSV) is an important parameter to describe the capability of energy transfer to oxygen for porphyrin and its derivatives. By fitting Stern–Volmer equation, IP0/IP = 1 + KSV[O2], the KSV is generally determined through phosphorescence intensities (IP) under aerobic and oxygen-free conditions. In this work, the effect of excitation power density on the KSV measurement is theoretically analyzed and experimentally studied, using palladium octaethylporphyrin (PdOEP) as an example. The IP of PdOEP increased nonlinearly with excitation power density, and the power dependent slope of IP0/IP could be obtained. By way of the functional relationship between the slope of IP0/IP and power density, the real KSV of PdOEP was fitted to be 58 ± 2 kPa−1. The oxygen-dependent phosphorescence lifetimes (τP) and IP under a weak excitation power are also measured to calculate the real KSV, which verifies our analysis.

UR - https://www.scopus.com/pages/publications/85173711124

U2 - 10.1364/OL.503390

DO - 10.1364/OL.503390

M3 - 文章

AN - SCOPUS:85173711124

SN - 0146-9592

VL - 48

SP - 5133

EP - 5136

JO - Optics Letters

JF - Optics Letters

IS - 19

ER -

Effects of excitation power density on the Stern–Volmer constant measurement

Abstract

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