TY - JOUR

T1 - Binuclear luminescent Pt(II) complexes based on substituted 3,6-diphenylpyridazines; synthesis and photophysical study

AU - Жуковский, Даниил Дмитриевич

AU - Сизов, Владимир Викторович

AU - Старова, Галина Леонидовна

AU - Туник, Сергей Павлович

AU - Грачева, Елена Валерьевна

N1 - Funding Information: The authors greatly appreciate financial support from the Russian Science Foundation , grant 16-13-10064 . The study was carried out using equipment of core facilities of St. Petersburg State University Research Park: Centres of Magnetic Resonance, Optical and Laser Materials Research, Chemical Analysis and Materials Research; Computer Centre and the X-ray Diffraction Centre. Appendix A

PY - 2018/7/15

Y1 - 2018/7/15

N2 - Seven novel binuclear Pt(II) metalated complexes based on substituted 3,6-diphenylpyridazines have been synthesized and structurally characterized using XRD crystallography, NMR spectroscopy and HR ESI mass-spectrometry. Three of these complexes contain two {Pt(CˆN)} metalated fragments located at diphenylpyridazine, the square-planar environment at platinum centres are completed with two terminal and one bridging chloride ligands. Substitution of terminal chlorides for various phosphines gave another group of complexes, which keep intact the metalated moieties and bridging chloride to form essentially similar structural motif. The compounds obtained display relatively weak green-orange phosphorescence in organic solvents with the quantum yield ranging from 1.0 to 3.4% in degassed solution. The experimental photophysical data and results of TDDFT calculations indicate that the observed emission occurs from the excited states of the mixed IL/MLCT nature, the contribution of the former dominates in chloride complexes, whereas in the phosphine derivatives the MLCT component of the emissive state shows considerable growth without visible variations in emission energy.

AB - Seven novel binuclear Pt(II) metalated complexes based on substituted 3,6-diphenylpyridazines have been synthesized and structurally characterized using XRD crystallography, NMR spectroscopy and HR ESI mass-spectrometry. Three of these complexes contain two {Pt(CˆN)} metalated fragments located at diphenylpyridazine, the square-planar environment at platinum centres are completed with two terminal and one bridging chloride ligands. Substitution of terminal chlorides for various phosphines gave another group of complexes, which keep intact the metalated moieties and bridging chloride to form essentially similar structural motif. The compounds obtained display relatively weak green-orange phosphorescence in organic solvents with the quantum yield ranging from 1.0 to 3.4% in degassed solution. The experimental photophysical data and results of TDDFT calculations indicate that the observed emission occurs from the excited states of the mixed IL/MLCT nature, the contribution of the former dominates in chloride complexes, whereas in the phosphine derivatives the MLCT component of the emissive state shows considerable growth without visible variations in emission energy.

KW - Cyclometalated complexes

KW - DFT calculations

KW - Diphenylpyridazine ligand

KW - Luminescence

KW - Platinum

KW - NHC COMPLEXES

KW - PHOTOLUMINESCENCE

KW - VAPOCHROMISM

KW - COORDINATION

KW - PHOSPHORESCENT

KW - LIGANDS

KW - SINGLET OXYGEN GENERATION

KW - 3,6-DIARYLPYRIDAZINES

KW - CYCLOMETALATED PLATINUM(II) COMPLEXES

KW - VOLATILE ORGANIC-COMPOUNDS

UR - http://www.scopus.com/inward/record.url?scp=85039870990&partnerID=8YFLogxK

UR - http://www.mendeley.com/research/binuclear-luminescent-ptii-complexes-based-substituted-36diphenylpyridazines-synthesis-photophysical

U2 - 10.1016/j.jorganchem.2017.12.023

DO - 10.1016/j.jorganchem.2017.12.023

M3 - Article

VL - 867

SP - 367

EP - 374

JO - Journal of Organometallic Chemistry

JF - Journal of Organometallic Chemistry

SN - 0022-328X

ER -