Structure and excitation-dependent emission of novel zinc complexes with pyridyltriazoles

A series of Zn( ii ) complexes with 5-(4- R -phenyl)-3-(pyridin-2-yl)-1,2,4-triazoles have been synthesized and subsequently characterized by single crystal X-ray diffraction, 1 H-NMR, FT-IR spectroscopy, elemental analyses, ESI-MS, and PXRD. The X-ray diffraction analyses revealed that the complexe...

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Bibliographic Details
Published in:RSC advances 2019-07, Vol.9 (38), p.22143-22152
Main Authors: Gusev, Alexey, Braga, Elena, Zamnius, Ekaterina, Kiskin, Mikhail, Kryukova, Mariya, Baryshnikova, Alina, Minaev, Boris, Baryshnikov, Gleb, Ågren, Hans, Linert, Wolfgang
Format: Article
Language:English
Subjects:
Change detection
Chemistry
Crystal structure
Crystallography
Emission analysis
Excitation
Hydrogen bonds
Infrared spectroscopy
Molecular structure
NMR
Nuclear magnetic resonance
Organic chemistry
Quantum chemistry
Single crystals
Supramolecular frameworks
Synthesis
Triazoles
Ultraviolet radiation
X-ray diffraction
Zinc
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Summary:A series of Zn( ii ) complexes with 5-(4- R -phenyl)-3-(pyridin-2-yl)-1,2,4-triazoles have been synthesized and subsequently characterized by single crystal X-ray diffraction, 1 H-NMR, FT-IR spectroscopy, elemental analyses, ESI-MS, and PXRD. The X-ray diffraction analyses revealed that the complexes have a similar molecular structure and their supramolecular frameworks are constructed by hydrogen bonds and π π interaction scaffolds. Upon irradiation with UV light, the studied complexes display deep blue emission at 396-436 nm in the solid state. The compounds show an unexpected excitation-dependent emission phenomenon which is detected by a change in the emission color (from blue to yellow) upon increase of the excitation wavelength. The conducted quantum-chemical calculations indicate that supramolecular differences in the single-crystal architecture of the synthesized complexes play a crucial role for this photophysical behaviour. A series of Zn( ii ) complexes with 5-(4- R -phenyl)-3-(pyridin-2-yl)-1,2,4-triazoles have been synthesized and subsequently characterized by single crystal X-ray diffraction, 1 H-NMR, FT-IR spectroscopy, elemental analyses, ESI-MS, and PXRD.
ISSN:2046-2069
2046-2069
DOI:10.1039/c9ra02491c