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Dergiler / Turkish Journal of Chemistry / 2018 / Cilt: 42 - Sayı: 6

Exploring inhibition of chemiluminescence mechanisms with fluorescence quenching studies and interaction energy calculations

Bo XIAO
Zhenbo LIU
Tangmi YUAN
Yongming LIU
Wenzuo LI
Qingzhong LI
Jianbo CHENG
Sayfa
1566–1576
Yayın Tarihi
2022-11-05
DOI
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⚡ TL;DR(1 Cümlede Hızlı Çıkarım)

This work may contribute to the study of themechanism of CL inhibition using fluorescence quenching and quantum chemistry calculation methods.

📌 3 Maddede Bu Makale

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Amaç & Hipotez:Carbamates weaken the luminol-H2 O2 chemiluminescence (CL) catalyzed by sodium copper chlorophyll(SCC).
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Temel Bulgular & Veri:Mechanisms of carbamates inhibiting SCC-luminol-H2 O2 CL are investigated using fluorescencequenching and quantum chemistry simulations for the first time in this work.
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Sonuç & Katkı:This work may contribute to the study of themechanism of CL inhibition using fluorescence quenching and quantum chemistry calculation methods.
🔬Tür:Araştırma Makalesi
📍Kapsam:Genişletilmiş Akademik Örneklem
⚙️Değişkenler:Alan Parametreleri

Abstract

Carbamates weaken the luminol-H2 O2 chemiluminescence (CL) catalyzed by sodium copper chlorophyll(SCC). The capacity to inhibit the CL of three carbamates is in the order of carbaryl (CBL) >carbofuran (CBF)>metolcarb (MTC). Mechanisms of carbamates inhibiting SCC-luminol-H2 O2 CL are investigated using fluorescencequenching and quantum chemistry simulations for the first time in this work. Carbamate-SCC interactions studiedusing fluorescence spectroscopy show that with the increasing concentration of the SCC, the fluorescence of carbamateis quenched regularly, and the quenching mechanism is a static quenching process. Binding constants (KB) of the threecarbamates with SCC are CBL (4.39 × 10 5) >CBF (1.46 × 10 4) >MTC (2.16 × 10 3 L/mol), which is completelyharmonious with the capacity to inhibit CL of the carbamates. Furthermore, the carbamate-SCC interaction energiesfrom quantum chemistry simulations are CBL-porphyrin copper (PPCu) (–30.1), CBF-PPCu (–21.0), and MTC-PPCu(–19.9 kJ/mol), which is also identical to their inhibiting capacity. This provides further evidence that the formation ofcarbamate-SCC complexes reduces the SCC catalytic activity and the CL intensity decreases. In addition, a novel flowinjection chemiluminescence method for the determination of carbamate was established based on carbamate inhibitingCL of the SCC-luminol-H2 O2 CL system under alkaline conditions. This work may contribute to the study of themechanism of CL inhibition using fluorescence quenching and quantum chemistry calculation methods.

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Bu Makaleye Atıf Yap

XIAO, B., LIU, Z., YUAN, T., LIU, Y., LI, W., LI, Q., CHENG, J. (2022). Exploring inhibition of chemiluminescence mechanisms with fluorescence quenching studies and interaction energy calculations. Turkish Journal of Chemistry, Cilt: 42 - Sayı: 6, 1566–1576. https://ajindex.com/articles/601741

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