Tuning Excited States of Bipyridyl Platinum(II) Chromophores with π-Bonded Catecholate Organometallic Ligands: Synthesis, Structures, TD-DFT Calculations, and Photophysical Properties

被引：26

作者：

Moussa, Jamal ^{[1
,2
]}

Chamoreau, Lise-Marie ^{[1
,2
]}

Esposti, Alessandra Degli ^{[3
]}

Gullo, Maria Pia ^{[3
]}

Barbieri, Andrea ^{[3
]}

Amouri, Hani ^{[1
,2
]}

机构：

[1] Univ Paris 06, UPMC Univ Paris 06, Sorbonne Univ, F-75252 Paris 05, France

[2] CNRS, Inst Parisien Chim Mol IPCM, UMR 8232, F-75252 Paris, France

[3] Consiglio Nazl Ric CNR, Ist Sintesi Organ Fotoreattivita ISOF, I-40129 Bologna Bo, Italy

来源：

INORGANIC CHEMISTRY | 2014年 / 53卷 / 13期

关键词：

DENSITY-FUNCTIONAL THEORY; EXCITATION-ENERGIES; DIIMINE COMPLEXES; CRYSTAL-STRUCTURES; QUINONOID LINKERS; LUMINESCENCE; REDOX; EMISSION; BEHAVIOR; PT(II);

D O I：

10.1021/ic500232w

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A series of bipyridyl (bpy) Pt(II) complexes with pi-bonded catecholate (cat) [(bpy)Pt(L-M)][BF4](n) (2-5) (L-M = Cp*Rh(cat), n = 2; Cp*Ir(cat), n = 2; Cp*Ru(cat), n = 1; and (C6H6)Ru(cat), n = 2) were prepared and fully characterized. The molecular structures of the four compounds were determined and showed that the solid-state packing is different and dependent on the pi--bonded catecholate unit. For instance, while the (bpy)Pt(II) complexes 2 and 3 with rhodium and iridium catecholates did not show any Pt Pt interactions those with the ruthenium catecholates 4 and 5 showed the presence of Pt ... Pt and pi-pi interactions among individual units and generated one- and two-dimensional supramolecular chains. The photophysical properties of these compounds 2-5 were investigated and showed that all compounds are luminescent at low temperature, in contrast to the well-known parent compound [(C6H4O2)Pt(bpy)] (1), which is weakly luminescent at 77 K. Time-dependent density functional theory studies are advanced to explain this difference in behavior and to highlight the role of the pi-bonded catecholate system.

引用

页码：6624 / 6633

页数：10

共 43 条

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