biostudies-literatureGusev AMinistry of Education and Science of UkraineRussian Foundation for Basic Research22143-22152https://www.ebi.ac.uk/biostudies/studies/S-EPMC9066697biostudies-literatureUnknown9(38)A series of Zn(ii) complexes with 5-(4-<i>R</i>-phenyl)-3-(pyridin-2-yl)-1,2,4-triazoles have been synthesized and subsequently characterized by single crystal X-ray diffraction, ¹H-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.RSC advancesStructure and excitation-dependent emission of novel zinc complexes with pyridyltriazoles.PMC906669718-29-040050117U0039080118U003862Kiskin MKryukova MGusev AAgren HMinaev BBraga EBaryshnikov GLinert WBaryshnikova AZamnius EfalseStructure and excitation-dependent emission of novel zinc complexes with pyridyltriazoles.A series of Zn(ii) complexes with 5-(4-<i>R</i>-phenyl)-3-(pyridin-2-yl)-1,2,4-triazoles have been synthesized and subsequently characterized by single crystal X-ray diffraction, ¹H-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.2019-01-01T00:00:00Z2019 Jul2025-04-19T09:20:38.999Z2025-04-19T09:20:38.999ZS-EPMC90666973551884310.1039/c9ra02491c