Aggregation of phosphorescent Pd(ii) and Pt(ii) complexes with lipophilic counter-anions in non-polar solvents

Zhou, Ning1; Zou, Chao1,2; Suo, Sa1; Liu, Yuliang1; Lin, Jinqiang1; Zhang, Xiaobao1; Shi, Minglin1; Chang, Xiaoyong1; Lu, Wei1

2023-03-01

10.1039/d2dt03415h

DALTON TRANSACTIONS   Impact Factor & Quartile

1477-9226

1477-9234

Phosphorescent cationic tridentate C<^>N<^>N (HC<^>N<^>N = 6-(2-R-2,4-R-1-phenyl)-2,2 '-bipyridine; R-1 = R-2 = H or F, or R-1 = OMe, R-2 = H) cyclometallated Pd(ii) complexes with an N,N-dimethyl-imidazol-allenylidene ancillary ligand (L) and their corresponding Pt(ii) congeners have been synthesized and characterized, following the previously reported preparation of the complex [Pd(6-phenyl-2,2 '-bipyridine)L](+). For these cationic Pd(ii)/Pt(ii) complexes with 2,3,4-tris(dodecyloxy)benzenesulfonate (LA(-)) counter-anions in mixed CH2Cl2/toluene solvents, uniform square flake or fibre-like aggregates were formed. Corresponding multicolour phosphorescence with obvious metal-metal-to-ligand charge transfer (MMLCT) features gradually changed from red to NIR by manipulating the various fractions of Pd/Pt species. Circular dichroism (CD) and circularly polarized luminescence (CPL) derived from the fibre-like Pd aggregates of [Pd(6-(2,4-difluorophenyl)-2,2 '-bipyridine)L](+) in chiroptical CH2Cl2/limonene solvents were achieved with an isodesmic aggregation mode. Dispersive metallophilic interactions are claimed to be the driving force for these photo-functional aggregates.

SCI

English

First ; Corresponding

National Natural Science Foundation of China["21571096","21873044","21901109"] ; Science and Technology Innovation Commission of Shenzhen Municipality[JCYJ 20170817104715174] ; Major Program of Guangdong Basic and Applied Research[2019B030302009] ; Natural Science Foundation of Guangdong Province[2020A1515011448]

Chemistry

Chemistry, Inorganic & Nuclear

WOS:000961809500001

ROYAL SOC CHEMISTRY

CHEMISTRY

Web of Science

1.Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Guangdong, Peoples R China
2.Songshan Lake Mat Lab, Frontier Res Ctr, Funct Coordinat Mat Grp, Dongguan 523808, Guangdong, Peoples R China

Zhou, Ning,Zou, Chao,Suo, Sa,et al. Aggregation of phosphorescent Pd(ii) and Pt(ii) complexes with lipophilic counter-anions in non-polar solvents[J]. DALTON TRANSACTIONS,2023.

Zhou, Ning.,Zou, Chao.,Suo, Sa.,Liu, Yuliang.,Lin, Jinqiang.,...&Lu, Wei.(2023).Aggregation of phosphorescent Pd(ii) and Pt(ii) complexes with lipophilic counter-anions in non-polar solvents.DALTON TRANSACTIONS.

Zhou, Ning,et al."Aggregation of phosphorescent Pd(ii) and Pt(ii) complexes with lipophilic counter-anions in non-polar solvents".DALTON TRANSACTIONS (2023).