Abstract

In this work we utilized the common analytical reagent morin to develop a new a dual-channel, cost-effective, and sensitive method for determination of Cu²⁺. It is found that morin is only weakly fluorescent by itself, but forms highly fluorescent complexes with boric acid. Moreover, the fluorescence of complexes of morin with boric acid is quenched linearly by Cu²⁺ in a certain concentration range. Under optimum conditions, the fluorescence quenching efficiency was linearly proportional to the concentration of cupric ions in the range of 0.5-25 μM with high sensitivity, and the detection limit for Cu²⁺ was 0.38 μM. The linear range was 1-25 μM determined by spectrophotometry, and the detection limit for cupric ions was 0.8 μM. Furthermore, the mechanism of sensitive fluorescence quenching response of morin to Cu²⁺ is discussed.

Ratio fluorescence sensor based on CD/Cu-MOFs for detection of Hg²⁺

Jingzhou Hou, Ya Zhang, Fanglin Ming, Yiyihui Hong, Huan Liu, Qiang He, Changjun Hou, and Danqun Huo
Appl. Opt. 62(6) A127-A136 (2023)

Sensitive determination of DNA based on phosphate-dye interaction using photothermal lens technique

Nader Shokoufi, Behnaz Abbasgholi Nejad Asbaghi, and Shafigh Nouri Hajibaba
Appl. Opt. 58(12) 3074-3082 (2019)

Using CaF₂:Eu³⁺ powder as a luminescent probe to detect Cr₂O₇ ^2- ions: a new application on the environmental conservation of an old optical material

Jianfu Pan, Kailing Zhong, Zhen Zhang, Wenting Chen, Yanping Lin, Guoqiang Wang, Lingyun Li, and Yan Yu
Opt. Mater. Express 8(9) 2782-2794 (2018)

Fabrication of Boric Acid Glass for Luminescence Studies*

M. Kasha
J. Opt. Soc. Am. 38(12) 1068-1073 (1948)

Transient nonlinear optical behavior of fluorescein-doped boric acid glass

Colette Maloney and Werner Blau
J. Opt. Soc. Am. B 9(12) 2225-2229 (1992)