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Phosphorescent Zwitterionic Pt(Ⅱ) N-Heterocyclic Allenylidene Complexes: IVletallophilicity and Ionic Self-Assembly 被引量:1
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作者 Qin Gao Fei Peng +4 位作者 Chuanfei Wang Jinqiang Lin Xiaoyong Chang Chao Zou Wei Lu 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2021年第5期1159-1167,共9页
Three zwitterionic and one cationic N-heterocyclic allenylidene(NHA)platinum(Ⅱ)complexes were prepared and characterized via NMR,HR-MS;and FT-IR,etc.Single crystal structure analyses revealed the various intermolecul... Three zwitterionic and one cationic N-heterocyclic allenylidene(NHA)platinum(Ⅱ)complexes were prepared and characterized via NMR,HR-MS;and FT-IR,etc.Single crystal structure analyses revealed the various intermolecular packing modes vio multiple noncovalent interactions(short Pt…Pt contacts,π-π interactions).The spectroscopic data demonstrated stability of the allenylidene metal complexes is largely ascribed to the resonance structures of zwitterionic acetylide.The zwitterionic and analogue cationic NHA Pt(Ⅱ)monomers showed similar steady-state photoluminescent properties in dilute fluid solution.Highly efficient solid-state phosphorescent emissions(quantum yield up to 20%)of these NHA Pt(Ⅱ)complexes are correlated with their dispersive metallophilic Pt…Pt interactions.HR-MS spectrum indicated zwitterionic monomers can self-assemble into oligomers,such as dimer,trimer and even hexamer in a mixed H_(2)0/Me0H solvent.Meanwhile,molecular aggregates showed variable red-shifted phosphorescence by manipulating the concentration,temperature,time and solvent in the self-assembly of zwitterionic NHA platinum(Ⅱ)complex. 展开更多
关键词 Luminescence PLATINUM N-Heterocyclic allenylidene Noncovalent interactions Polymorphism
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