Trigonal propeller-shaped [Mn(III)3M(II)Na] complexes (M = Mn, Ca): structural and functional models for the dioxygen evolving centre of PSII.

نویسندگان

  • Sanjit Nayak
  • Hari Pada Nayek
  • Stefanie Dehnen
  • Annie K Powell
  • Jan Reedijk
چکیده

Two new polynuclear heterometallic cluster complexes with [Mn(III)(3)M(II)Na] (M = Mn, Ca) core were synthesized using two in situ formed Schiff bases. The compounds were structurally characterized by single crystal X-ray analysis. The compound with [Mn(III)Ca(II)Na] appeared to catalyse water oxidation which was followed by using Clark electrode and online mass spectrometry.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

QM/MM computational studies of substrate water binding to the oxygen-evolving centre of photosystem II.

This paper reports computational studies of substrate water binding to the oxygen-evolving centre (OEC) of photosystem II (PSII), completely ligated by amino acid residues, water, hydroxide and chloride. The calculations are based on quantum mechanics/molecular mechanics hybrid models of the OEC of PSII, recently developed in conjunction with the X-ray crystal structure of PSII from the cyanoba...

متن کامل

Where water is oxidized to dioxygen: structure of the photosynthetic Mn4Ca cluster.

The oxidation of water to dioxygen is catalyzed within photosystem II (PSII) by a Mn(4)Ca cluster, the structure of which remains elusive. Polarized extended x-ray absorption fine structure (EXAFS) measurements on PSII single crystals constrain the Mn(4)Ca cluster geometry to a set of three similar high-resolution structures. Combining polarized EXAFS and x-ray diffraction data, the cluster was...

متن کامل

A synthetic model of the Mn₃Ca subsite of the oxygen-evolving complex in photosystem II.

Within photosynthetic organisms, the oxygen-evolving complex (OEC) of photosystem II generates dioxygen from water using a catalytic Mn(4)CaO(n) cluster (n varies with the mechanism and nature of the intermediate). We report here the rational synthesis of a [Mn(3)CaO(4)](6+) cubane that structurally models the trimanganese-calcium-cubane subsite of the OEC. Structural and electrochemical compar...

متن کامل

Artificial synthetic Mn(IV)Ca-oxido complexes mimic the oxygen-evolving complex in photosystem II.

A novel family of heteronuclear Mn(IV)Ca-oxido complexes containing Mn(IV)Ca-oxido cuboidal moieties and reactive water molecules on Ca(2+) have been synthesized and characterized to mimic the oxygen-evolving complex (OEC) of photosystem II (PSII) in nature.

متن کامل

Mononuclear Manganese–Peroxo and Bis ACHTUNGTRENNUNG(m-oxo)dimanganese Complexes Bearing a Common N-Methylated Macrocyclic Ligand

Metal–oxygen adducts (Mx Ox, x=1 or 2), such as metal– superoxo, –peroxo, and –oxo species, are key intermediates often detected in the catalytic cycles of dioxygen activation by metalloenzymes. In biomimetic and synthetic chemistry, numerous Mx Ox complexes have been prepared and characterized with various physicochemical methods as structural and functional models of enzymes. Among the Mx O2 ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Dalton transactions

دوره 40 12  شماره 

صفحات  -

تاریخ انتشار 2011