Journal
CRYSTAL GROWTH & DESIGN
Volume 15, Issue 10, Pages 5040-5046Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.cgd.5b01026
Keywords
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Funding
- National Natural Science Foundation of China [21202020, 21273037]
- Doctoral Fund of the Ministry of Education of China [20123514120002]
- Natural Science Foundation of Fujian Province [2014J01040, 2014J01045]
- Science & Technical Development Foundation of Fuzhou University [2012-XQ-10, 2013-XQ-14]
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A stable three-dimensional coordination polymer, [Eu-3(bcbp)(3)(NO3)(7)(OH)(2)](n) (1) (H(2)bcbp center dot 2Cl = 1,1'-bis(4-carboxyphenyl)-(4,4'-bipyridinium) dichloride), was prepared by the solvothermal reaction of Eu(NO3)(3)center dot 6H(2)O and H(2)bcbp center dot 2Cl in methanol, which was characterized by infrared spectroscopy, single-crystal X-ray diffraction, powder X-ray diffraction, and thermogravimetric analyses. In the solid state, 1 consists of an unusual trinuclear Eu(III) unit (Eu-3(CO2)(6)(NO3)(7)(OH), Eu-3-SBU), which further connects to six neighboring ones through six bcbp ligands to form a three-dimensional network. As expected, 1 exhibits a strong red-light emission at ambient temperature. Due to the presence of the electron-deficient bipyridinium moiety in the conjugation, this emission is selectively quenched by electron-rich organic amine compounds with high sensitivity and exhibits a prominent visual color change.
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