Fluorescence emission modulation in cyanido-bridged Fe(II) spin crossover coordination polymers

Xue Ru Wu; Zhi Kun Liu; Min Zeng; Ming Xing Chen; Jun Tao; Shu Qi Wu; Hui Zhong Kou

doi:10.1007/s11426-022-1294-8

Fluorescence emission modulation in cyanido-bridged Fe(II) spin crossover coordination polymers

Xue Ru Wu
, Zhi Kun Liu
, Min Zeng
, Ming Xing Chen
, Jun Tao
, Shu Qi Wu^*
, Hui Zhong Kou^*

^*Corresponding author for this work

School of Chemistry and Chemical Engineering

Tsinghua University
Beijing Institute of Technology
Peking University
Kyushu University

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

28 Citations (Scopus)

Abstract

Synergistic fluorescent spin crossover (SCO) bifunctional molecular materials have novel applications in the molecule-based magneto-optical switches. Herein, we report two novel three-dimensional (3D) Hofmann-type fluorescent SCO complexes [Fe^II-(tppe)M^I(CN)₂]ClO₄·nSolv (tppe = tetra-(4-pyridylphenyl)ethene, M = Ag (tppe-Ag), Au (tppe-Au)). Both complexes show one-step abrupt SCO with the transition temperature of 230 K for tppe-Ag, and 245 K for tppe-Au accompanied by a color change from red to light yellow. The SCO process is confirmed by the variable-temperature single-crystal X-ray diffraction analysis on tppe-Ag. For the first time, the abnormal increase in emission intensity and concomitant large bathochromic shifts in the fluorescence spectra during the SCO process are realized in the 3D Hofmann-type coordination polymers expanded by the tetradentate tppe ligand. Moreover, tppe-Ag exhibits the unprecedented fluorescence emission from green to the edge of yellow.[Figure not available: see fulltext.]

Original language	English
Pages (from-to)	1569-1576
Number of pages	8
Journal	Science China Chemistry
Volume	65
Issue number	8
DOIs	https://doi.org/10.1007/s11426-022-1294-8
Publication status	Published - Aug 2022

Keywords

coordination polymers
fluorescence
multifunctional materials
spin crossover
synergetic effect

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10.1007/s11426-022-1294-8

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title = "Fluorescence emission modulation in cyanido-bridged Fe(II) spin crossover coordination polymers",

abstract = "Synergistic fluorescent spin crossover (SCO) bifunctional molecular materials have novel applications in the molecule-based magneto-optical switches. Herein, we report two novel three-dimensional (3D) Hofmann-type fluorescent SCO complexes [FeII-(tppe)MI(CN)2]ClO4·nSolv (tppe = tetra-(4-pyridylphenyl)ethene, M = Ag (tppe-Ag), Au (tppe-Au)). Both complexes show one-step abrupt SCO with the transition temperature of 230 K for tppe-Ag, and 245 K for tppe-Au accompanied by a color change from red to light yellow. The SCO process is confirmed by the variable-temperature single-crystal X-ray diffraction analysis on tppe-Ag. For the first time, the abnormal increase in emission intensity and concomitant large bathochromic shifts in the fluorescence spectra during the SCO process are realized in the 3D Hofmann-type coordination polymers expanded by the tetradentate tppe ligand. Moreover, tppe-Ag exhibits the unprecedented fluorescence emission from green to the edge of yellow.[Figure not available: see fulltext.]",

keywords = "coordination polymers, fluorescence, multifunctional materials, spin crossover, synergetic effect",

author = "Wu, \{Xue Ru\} and Liu, \{Zhi Kun\} and Min Zeng and Chen, \{Ming Xing\} and Jun Tao and Wu, \{Shu Qi\} and Kou, \{Hui Zhong\}",

note = "Publisher Copyright: {\textcopyright} 2022, Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature.",

year = "2022",

month = aug,

doi = "10.1007/s11426-022-1294-8",

language = "English",

volume = "65",

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TY - JOUR

T1 - Fluorescence emission modulation in cyanido-bridged Fe(II) spin crossover coordination polymers

AU - Wu, Xue Ru

AU - Liu, Zhi Kun

AU - Zeng, Min

AU - Chen, Ming Xing

AU - Tao, Jun

AU - Wu, Shu Qi

AU - Kou, Hui Zhong

PY - 2022/8

Y1 - 2022/8

N2 - Synergistic fluorescent spin crossover (SCO) bifunctional molecular materials have novel applications in the molecule-based magneto-optical switches. Herein, we report two novel three-dimensional (3D) Hofmann-type fluorescent SCO complexes [FeII-(tppe)MI(CN)2]ClO4·nSolv (tppe = tetra-(4-pyridylphenyl)ethene, M = Ag (tppe-Ag), Au (tppe-Au)). Both complexes show one-step abrupt SCO with the transition temperature of 230 K for tppe-Ag, and 245 K for tppe-Au accompanied by a color change from red to light yellow. The SCO process is confirmed by the variable-temperature single-crystal X-ray diffraction analysis on tppe-Ag. For the first time, the abnormal increase in emission intensity and concomitant large bathochromic shifts in the fluorescence spectra during the SCO process are realized in the 3D Hofmann-type coordination polymers expanded by the tetradentate tppe ligand. Moreover, tppe-Ag exhibits the unprecedented fluorescence emission from green to the edge of yellow.[Figure not available: see fulltext.]

AB - Synergistic fluorescent spin crossover (SCO) bifunctional molecular materials have novel applications in the molecule-based magneto-optical switches. Herein, we report two novel three-dimensional (3D) Hofmann-type fluorescent SCO complexes [FeII-(tppe)MI(CN)2]ClO4·nSolv (tppe = tetra-(4-pyridylphenyl)ethene, M = Ag (tppe-Ag), Au (tppe-Au)). Both complexes show one-step abrupt SCO with the transition temperature of 230 K for tppe-Ag, and 245 K for tppe-Au accompanied by a color change from red to light yellow. The SCO process is confirmed by the variable-temperature single-crystal X-ray diffraction analysis on tppe-Ag. For the first time, the abnormal increase in emission intensity and concomitant large bathochromic shifts in the fluorescence spectra during the SCO process are realized in the 3D Hofmann-type coordination polymers expanded by the tetradentate tppe ligand. Moreover, tppe-Ag exhibits the unprecedented fluorescence emission from green to the edge of yellow.[Figure not available: see fulltext.]

KW - coordination polymers

KW - fluorescence

KW - multifunctional materials

KW - spin crossover

KW - synergetic effect

UR - https://www.scopus.com/pages/publications/85134492917

U2 - 10.1007/s11426-022-1294-8

DO - 10.1007/s11426-022-1294-8

M3 - Article

AN - SCOPUS:85134492917

SN - 1674-7291

VL - 65

SP - 1569

EP - 1576

JO - Science China Chemistry

JF - Science China Chemistry

IS - 8

ER -

Fluorescence emission modulation in cyanido-bridged Fe(II) spin crossover coordination polymers

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