NIR-Emissive Chromium(0), Molybdenum(0), and Tungsten(0) Complexes in the Solid State at Room Temperature

被引：31

作者：

Boden, Pit ^{[1
,2
]}

Di Martino-Fumo, Patrick ^{[1
,2
]}

Bens, Tobias ^{[3
]}

Steiger, Sophie ^{[1
,2
]}

Albold, Uta ^{[4
]}

Niedner-Schatteburg, Gereon ^{[1
,2
]}

Gerhards, Markus ^{[1
,2
]}

Sarkar, Biprajit ^{[3
]}

机构：

[1] TU Kaiserslautern, Dept Chem, Erwin Schrodinger Str 52, D-67663 Kaiserslautern, Germany

[2] TU Kaiserslautern, Res Ctr Optimas, Erwin Schrodinger Str 52, D-67663 Kaiserslautern, Germany

[3] Univ Stuttgart, Inst Inorgan Chem, Chair Inorgan Coordinat Chem, Pfaffenwaldring 55, D-70569 Stuttgart, Germany

[4] Free Univ Berlin, Inst Chem & Biochem, Fabeckstr 34-36, D-14195 Berlin, Germany

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2021年 / 27卷 / 51期

关键词：

carbonyl ligands; mesoionic carbenes; NIR II emitters; step-scan FTIR spectroscopy; X-ray diffraction; EXCITED-STATE; MESOIONIC CARBENE; PLATINUM(II) COMPLEXES; PHOTOCHEMISTRY; LUMINESCENCE; LIGAND; PHOTOPHYSICS; CU(I); ELECTROCHEMISTRY; FLUORESCENCE;

D O I：

10.1002/chem.202102208

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The development of NIR emitters based on earth-abundant elements is an important goal in contemporary science. We present here Cr(0), Mo(0), and W(0) carbonyl complexes with a pyridyl-mesoionic carbene (MIC) based ligand. A detailed photophysical investigation shows that all the complexes exhibit dual emissions in the VIS and in the NIR region. The emissive excited states are assigned to two distinct triplet states by time-resolved emission and step-scan FTIR spectroscopy at variable temperature, supported by density functional theory. In particular, the NIR emissive triplet state exhibits unprecedented lifetimes of up to 600 +/- 10 ns and quantum yields reaching 1.7 . 10(-4) at room temperature. These are the first examples of Cr(0), Mo(0) and W(0) complexes that emit in the NIR II region.

引用

页码：12959 / 12964

页数：6

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