Controlled Synthesis of Pd-II and Pt-II Supramolecular Copolymer with Sequential Multiblock and Amplified Phosphorescence

Wan, Qingyun1,2; To, Wai-Pong1,2; Chang, Xiaoyong3; Che, Chi-Ming1,2,4

2020-04-09

10.1016/j.chempr.2020.01.021

Chem   影响因子和分区

2451-9294

Supramolecular copolymers constitute a fundamental new class of functional materials attracting burgeoning interest, but examples that display phosphorescence and long-lived excited states are rare. Herein, we describe the synthesis of sequential phosphorescent multi-block supramolecular copolymers in one and multiple dimensions using pincer Pt-II and Pd-II complexes as building blocks by manipulating out-of-equilibrium self-assemblies via the living supramolecular polymerization approach. Doping a small amount of Pt-II complexes (2 mol %) into the Pd-II assemblies significantly boosted the emission efficiency and radiative decay rate constant (Phi(em) = 3.7%, k(r) = 1.8 x 10(4) s(-1) in Pd-II assemblies; (Phi(em) = 76.2%, k(r) = 58.6 x 10(4) s(-1) in Pt-II-Pd-II co-assemblies), which is ascribed to an external heavy-atom spin-orbital coupling effect arising from the doped Pt-II complex with a delocalized (3)[d sigma* -> pi*] excited state. The findings on Pt-II and Pd-II supramolecular copolymers with controlled sequences and greatly enhanced phosphorescence efficiencies open the door to new photofunctional and responsive luminescent metal-organic supramolecular materials.

SCI

英语

其他

Major Program of Guangdong Basic and Applied Research, China[2019B030302009]

Chemistry

Chemistry, Multidisciplinary

WOS:000526099500021

CELL PRESS

Web of Science

1.Univ Hong Kong, Dept Chem, Pokfulam Rd, Hong Kong, Peoples R China
2.Univ Hong Kong, State Key Lab Synthet Chem, Pokfulam Rd, Hong Kong, Peoples R China
3.Southern Univ Sci & Technol China, Dept Chem, Shenzhen 518055, Guangdong, Peoples R China
4.HKU Shenzhen Inst Res & Innovat, Shenzhen 518057, Peoples R China

Wan, Qingyun,To, Wai-Pong,Chang, Xiaoyong,et al. Controlled Synthesis of Pd-II and Pt-II Supramolecular Copolymer with Sequential Multiblock and Amplified Phosphorescence[J]. Chem,2020,6(4):945-967.

Wan, Qingyun,To, Wai-Pong,Chang, Xiaoyong,&Che, Chi-Ming.(2020).Controlled Synthesis of Pd-II and Pt-II Supramolecular Copolymer with Sequential Multiblock and Amplified Phosphorescence.Chem,6(4),945-967.

Wan, Qingyun,et al."Controlled Synthesis of Pd-II and Pt-II Supramolecular Copolymer with Sequential Multiblock and Amplified Phosphorescence".Chem 6.4(2020):945-967.