Light controlled oxidation by supramolecular Zn(II) Schiff-base complexes

被引：11

作者：

Laube, Christian ^{[1
,2
]}

Taut, Josef Anton ^{[1
]}

Kretzschmar, Jonas ^{[4
]}

Zahn, Stefan ^{[1
]}

Knolle, Wolfgang ^{[1
]}

Ullman, Steve ^{[4
]}

Kahnt, Axel ^{[1
]}

Kersting, Berthold ^{[4
]}

Abel, Bernd ^{[1
,3
]}

机构：

[1] Leibniz Inst Surface Engn IOM, Dept Funct Surfaces, D-04318 Leipzig, Germany

[2] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94704 USA

[3] Univ Leipzig, Wilhelm Ostwald Inst Phys & Theoret Chem, Linnestr 2, D-04103 Leipzig, Germany

[4] Univ Leipzig, Inst Inorgan Chem, Johannisallee 29, D-04103 Leipzig, Germany

来源：

INORGANIC CHEMISTRY FRONTIERS | 2020年 / 7卷 / 22期

关键词：

TRIPLET-STATES; ELECTRONIC-STRUCTURE; MOLECULAR-OXYGEN; PHOTOSENSITIZER; PHOTOCHEMISTRY; GENERATION; MECHANISM; RECOGNITION; DERIVATIVES; EFFICIENT;

D O I：

10.1039/d0qi00980f

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The application of supramolecular host-guest chemistry for controlled photoreactivity and molecular sensing is a highly important field of modern inorganic and physical chemistry. One key aspect is the formation of the triplet state after photoexcitation. Applications of zinc ion Schiff-base derivatives for this purpose are rarely reported in the literature and there is still a lack of investigation into the triplet state formation of these supramolecular complexes. In this paper, triplet state formation and photosensitization is demonstrated for Zn(II) salicylaldiminato-functionalized calixarene complexes. We show that the photoinduced triplet state formation and the photoreactivity is a direct consequence of the Zn2+ complexation. Herein, the photochemical reactivity, as well as the mechanistic details of the photooxidation were deduced from a comprehensive set of steady state and time resolved spectroscopic as well as radiation chemistry data, respectively. The metal center (Zn2+) controlled photoreactivity observed here may lead to novel applications in the direction of photodynamical therapy or may open new avenues in catalysis, selective reactions and sensor applications.

引用

页码：4333 / 4346

页数：14

共 69 条

[61] PORPHYRIN-SENSITIZED GENERATION OF SINGLET MOLECULAR-OXYGEN - COMPARISON OF STEADY-STATE AND TIME-RESOLVED METHODS [J].