We report here a new Dy^(Ⅲ)-SIM[Dy(OPCy_(3))_(2)(H_(2)O)_(5)](CF_(3)SO_(3))_(3)·_(2)OPCy_(3)(OPCy_(3)=tricyclohexylphosphine oxide)with a pentagonal bipyramidal geometry,which exhibits a blocking temperature T_(...We report here a new Dy^(Ⅲ)-SIM[Dy(OPCy_(3))_(2)(H_(2)O)_(5)](CF_(3)SO_(3))_(3)·_(2)OPCy_(3)(OPCy_(3)=tricyclohexylphosphine oxide)with a pentagonal bipyramidal geometry,which exhibits a blocking temperature T_(B)=8.5 K and an anisotropy barrier U_(eff)=562 K.Ab initio calculations show that this complex exhibits the largest U_(calc)=732 K among the Dy^(Ⅲ)-SIM complexes containing the[Dy(L)_(2)(H_(2)O)_(5)]^(3+)(L=phosphine oxide derivative)cationic unit.展开更多
The complexation of 4,4’-halogen-substituted biphenyls(BPs)with a trinuclear silver(I)3,5-bis(trifluoromethyl)pyrazolate adduct([AgL]_(3))is observed in the solution and solid states.Infinite stacks are formed by alt...The complexation of 4,4’-halogen-substituted biphenyls(BPs)with a trinuclear silver(I)3,5-bis(trifluoromethyl)pyrazolate adduct([AgL]_(3))is observed in the solution and solid states.Infinite stacks are formed by alternating BPs and[AgL]_(3) molecules via multiple metal-πinteractions in a crystal.Encapsulation of the biphenyl derivatives between the[AgL]_(3) units allows room-temperature phosphorescence in the solid state.Furthermore,the intercalation of BPs results in the formation of planar geometry,which allows the reduction of non-radiative relaxation and enhances luminescence due to the planar geometry of the excited states.Another crucial factor in efficient light emission is the asymmetry of the intermolecular complexes.The obtained complexes exhibited both phosphorescence and fluorescence bands spanning a wide spectral range.Furthermore,fine-tuning of emissions by varying excitation energy could produce white light.展开更多
基金support from Ministerio de Economía y Competitividad(MINECO)for Projects CTQ2014-56312-P and PGC2018-102052-B-C21,the Junta de Andalucía(FQM-195)FEDER project A-FQM-172-UGR18 and the University of Granada is gratefully acknowledged+1 种基金A part of this work was carried out at HFLSM,IMR,Tohoku UniversityI.F.D.O.also acknowledges support by COLABS.GR would like to thank the SERB(CRG/2018/000430)for financial support.S.D.thanks the UGC for a Senior Research Fellowship.
文摘We report here a new Dy^(Ⅲ)-SIM[Dy(OPCy_(3))_(2)(H_(2)O)_(5)](CF_(3)SO_(3))_(3)·_(2)OPCy_(3)(OPCy_(3)=tricyclohexylphosphine oxide)with a pentagonal bipyramidal geometry,which exhibits a blocking temperature T_(B)=8.5 K and an anisotropy barrier U_(eff)=562 K.Ab initio calculations show that this complex exhibits the largest U_(calc)=732 K among the Dy^(Ⅲ)-SIM complexes containing the[Dy(L)_(2)(H_(2)O)_(5)]^(3+)(L=phosphine oxide derivative)cationic unit.
基金supported by the Russian Science Foundation(project№19-73-20262)NMR investigations were performed with the financial support of the Ministry of Science and Higher Education of the Russian Federation employing the equipment of Center for molecular composition studies of INEOS RAS.The crystal structures of 1Ag,2Ag and 3Ag were established using the equipment of St.Petersburg University Research Park(Center of X-ray Diffraction).
文摘The complexation of 4,4’-halogen-substituted biphenyls(BPs)with a trinuclear silver(I)3,5-bis(trifluoromethyl)pyrazolate adduct([AgL]_(3))is observed in the solution and solid states.Infinite stacks are formed by alternating BPs and[AgL]_(3) molecules via multiple metal-πinteractions in a crystal.Encapsulation of the biphenyl derivatives between the[AgL]_(3) units allows room-temperature phosphorescence in the solid state.Furthermore,the intercalation of BPs results in the formation of planar geometry,which allows the reduction of non-radiative relaxation and enhances luminescence due to the planar geometry of the excited states.Another crucial factor in efficient light emission is the asymmetry of the intermolecular complexes.The obtained complexes exhibited both phosphorescence and fluorescence bands spanning a wide spectral range.Furthermore,fine-tuning of emissions by varying excitation energy could produce white light.
