New Insight of Fe Valence State Change Using Leaves: A Combined Experimental and Theoretical Study
Zejun Zhang1,2, Yizhou Yang3*, Jie Jiang4, Liang Chen4,5, Shanshan Liang3*, and Haiping Fang3
1Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China 2University of Chinese Academy of Sciences, Beijing 100049, China 3School of Physics, East China University of Science and Technology, Shanghai 200237, China 4School of Physical Science and Technology, Ningbo University, Ningbo 315211, China 5Department of Optical Engineering, Zhejiang Provincial Key Laboratory of Chemical Utilization of Forestry Biomass, Zhejiang A&F University, Hangzhou 311300, China
Abstract：Fe$^{2+}$ is of considerable importance in plant growth and crop production. However, most Fe elements in nature favor existing in the trivalent state, which often causes the deficiency of Fe$^{2+}$ in plants. Here, we report the Fe valence state change from Fe$^{3+}$ to Fe$^{2+}$ by using leaves. This valence state change was confirmed by x-ray photoelectron spectroscopy in Fe-Cl@leaves. Fourier transform infrared and ultraviolet-visible spectroscopy demonstrated that aromatic ring groups were included in leaves, and cation-$\pi$ interactions between Fe cations and the components containing aromatic rings in leaves were measured. Further, density functional theory calculations revealed that the most stable adsorption site for hydrated Fe$^{3+}$ cation was the region where hydroxyl groups and aromatic rings coexist. Moreover, molecular orbital and charge decomposition analysis revealed that the aromatic rings took the major part (59%) of the whole net charge transfer between leaves and Fe cations. This work provides a high-efficiency and eco-friendly way to transform the Fe valence state from Fe$^{3+}$ to Fe$^{2+}$, and affords a new insight into the valance change between plant organisms with cations.
(Spectroscopic and microscopic techniques in biophysics and medical physics)
引用本文:
. [J]. 中国物理快报, 2022, 39(10): 108201-.
Zejun Zhang, Yizhou Yang, Jie Jiang, Liang Chen, Shanshan Liang, and Haiping Fang. New Insight of Fe Valence State Change Using Leaves: A Combined Experimental and Theoretical Study. Chin. Phys. Lett., 2022, 39(10): 108201-.
Zhang L, Shi G S, Peng B Q, Gao P F, Chen L, Zhong N, Mu L H, Zhang L J, Zhang P, Gou L, Zhao Y M, Liang S S, Jiang J, Zhang Z J, Ren H T, Lei X L, Yi R B, Qiu Y W, Zhang Y F, Liu X, Wu M L, Yan L, Duan C G, Zhang S L, and Fang H P2021 Natl. Sci. Rev.8 nwaa274
Chen L, Shi G, Shen J, Peng B, Zhang B, Wang Y, Bian F, Wang J, Li D, Qian Z, Xu G, Liu G, Zeng J, Zhang L, Yang Y, Zhou G, Wu M, Jin W, Li J, and Fang H 2017 Nature550 380
Shi G S, Dang Y R, Pan T T, Liu X, Liu H, Li S X, Zhang L J, Zhao H W, Li S P, Han J G, Tai R Z, Zhu Y M, Li J C, Ji Q, Mole R A, Yu D, and Fang H P 2016 Phys. Rev. Lett.117 238102
2022, Vol. 39 
