Synthesis, characterization and structural investigation of novel meso-pyridyl BODIPY-cobaloxime complexes

被引：27

作者：

Bartelmess, Juergen ^{[1
]}

Weare, Walter W. ^{[1
]}

Sommer, Roger D. ^{[1
]}

机构：

[1] N Carolina State Univ, Raleigh, NC 27695 USA

来源：

DALTON TRANSACTIONS | 2013年 / 42卷 / 41期

关键词：

ARTIFICIAL PHOTOSYNTHESIS; HYDROGEN-PRODUCTION; ELECTRON-TRANSFER; CHARGE-TRANSFER; ENERGY-TRANSFER; WATER; MODELS; DYES; DISSOCIATION; PORPHYRIN;

D O I：

10.1039/c3dt51849c

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

We report the synthesis of four boron-dipyrromethene (BODIPY) sensitized cobaloxime complexes as structural models of light-driven proton reduction catalysts. The BODIPY chromophore is covalently linked to the cobaloxime via a pyridine molecule in the meso-position of the BODIPY. Electron withdrawing or donating substituents on the pyridine (e.g. chloro-or methyl-groups) allow a comparison of the influence of these substituents on cobaloxime-BODIPY interactions. This includes altering the overall stability of the complexes and tuning the catalytically relevant CoII/III redox couple over a range of 220 mV, which will assist in the design of future cobaloxime-chromophore complexes. All complexes were characterized using electrochemistry, electronic absorption and fluorescence spectroscopy. Additionally, we present crystal structures of the four new BODIPY-cobaloxime complexes and elucidate the influence of the structural modifications. We found that these compounds produce sub-stoichiometric quantities of hydrogen under standard photon-driven hydrogen evolving conditions.

引用

页码：14883 / 14891

页数：9

共 49 条

[1]

Andreiadis ES, 2013, NAT CHEM, V5, P48, DOI [10.1038/NCHEM.1481, 10.1038/nchem.1481]

[2] Splitting Water with Cobalt [J].