Monitoring the Spin States of Ferrous Ions by Fluorescence Spectroscopy in Spin-Crossover-Fluorescent Hybrid Materials

Chemistry : a European Journal
Chun-Feng WangJun Tao

Abstract

The grafts of fluorophores 9-anthraldehyde (AD) and 9-phenanthrenecarboxaldehyde (PD), respectively, on the one-dimensional spin-crossover compound [Fe(L)3](ClO4)2(FeL, L=4-amino-1,2,4-triazole) by post-synthetic aldimine condensation reactions produced two spin-crossover (SCO)-fluorescent hybrid materials, that is, FeL-AD and FeL-PD. The spin-crossover critical temperatures of the two materials both centered at Tc↓=254 and Tc↑=256 K, whereas the fluorescence intensities of the two materials featured functions of the temperature that strictly synchronized with the spin-crossover processes, which showed that the ligand-centered fluorescence was dominated by the spin states of the ferrous ions. The bifunctional entities (spin-crossover centers and fluorophores) in FeL-AD or FeL-PD showed spectral band overlap that purported the Förster resonance energy transfer mechanism of such spin-crossover-fluorescence correlation. The post-synthetic modification of SCO materials and the relationship between the fluorescence and the SCO may be helpful in the development of multifunctional materials that can be sensitive to multiple stimuli.

References

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Dec 11, 2014·Materials Science & Engineering. C, Materials for Biological Applications·Chunfeng WangZhaosheng Bu
Dec 17, 2014·Angewandte Chemie·Chun-Feng WangJun Tao
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Nov 26, 2016·Chemical Communications : Chem Comm·Chun-Feng WangJun Tao
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Citations

Nov 7, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Alejandro Enríquez-CabreraAzzedine Bousseksou
Feb 6, 2020·Chemical Communications : Chem Comm·Zi-Shuo YaoJun Tao
Feb 20, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Jed H Askew, Helena J Shepherd
May 30, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Esther Resines-UrienJosé Sánchez Costa
Jul 10, 2018·Journal of the American Chemical Society·Juan YuanHui-Zhong Kou
Sep 24, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Zhilin GuoYuan-Zhu Zhang

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