Koichiro Jitsukawa

Bio: Koichiro Jitsukawa is an academic researcher from Nagoya Institute of Technology. The author has contributed to research in topics: Ligand & Hydrogen bond. The author has an hindex of 25, co-authored 109 publications receiving 2029 citations.

Structural and Spectroscopic Characterization of a Mononuclear Hydroperoxo-Copper(II) Complex with Tripodal Pyridylamine Ligands.

Abstract: A model for the key intermediate in copper oxygenase reactions, the Cu(II)-OOH complex, was prepared with the novel tripodal pyridylamine ligand, bis(6-pivalamide-2-pyridylmethyl)(2-pyridylmethyl)amine. The HOO- moiety is stabilized by hydrogen bonding to two amine H atoms (see structure on the right).

Reactivity of hydroperoxide bound to a mononuclear non-heme iron site.

Abstract: The first isolation and spectroscopic characterization of the mononuclear hydroperoxo−iron(III) complex [Fe(H2bppa)(OOH)]2+ (2) and the stoichiometric oxidation of substrates by the mononuclear iron−oxo intermediate generated by its decomposition have been described. The purple species 2 obtained from reaction of [Fe(H2bppa)(HCOO)](ClO4)2 with H2O2 in acetone at −50 °C gave characteristic UV−vis (λmax = 568 nm, e = 1200 M-1 cm-1), ESR (g = 7.54, 5.78, and 4.25, S = 5/2), and ESI mass spectra (m/z 288.5 corresponding to the ion, [Fe(bppa)(OOH)]2+), which revealed that 2 is a high-spin mononuclear iron(III) complex with a hydroperoxide in an end-on fashion. The resonance Raman spectrum of 2 in d6-acetone revealed two intense bands at 621 and 830 cm-1, which shifted to 599 and 813 cm-1, respectively, when reacted with 18O-labeled H2O2. Reactions of the isolated (bppa)FeIII−OOH (2) with various substrates (single turnover oxidations) exhibited that the iron−oxo intermediate generated by decomposition of 2 is ...

Hybrid porous solids: past, present, future

Abstract: This critical review will be of interest to the experts in porous solids (including catalysis), but also solid state chemists and physicists. It presents the state-of-the-art on hybrid porous solids, their advantages, their new routes of synthesis, the structural concepts useful for their ‘design’, aiming at reaching very large pores. Their dynamic properties and the possibility of predicting their structure are described. The large tunability of the pore size leads to unprecedented properties and applications. They concern adsorption of species, storage and delivery and the physical properties of the dense phases. (323 references)

Molecular self-assembly and nanochemistry: A chemical strategy for the synthesis of nanostructures

Abstract: Molecular self-assembly is the spontaneous association of molecules under equilibrium conditions into stable, structurally well-defined aggregates joined by noncovalent bonds. Molecular self-assembly is ubiquitous in biological systems and underlies the formation of a wide variety of complex biological structures. Understanding self-assembly and the associated noncovalent interactions that connect complementary interacting molecular surfaces in biological aggregates is a central concern in structural biochemistry. Self-assembly is also emerging as a new strategy in chemical synthesis, with the potential of generating nonbiological structures with dimensions of 1 to 10(2) nanometers (with molecular weights of 10(4) to 10(10) daltons). Structures in the upper part of this range of sizes are presently inaccessible through chemical synthesis, and the ability to prepare them would open a route to structures comparable in size (and perhaps complementary in function) to those that can be prepared by microlithography and other techniques of microfabrication.

Hydroamination: direct addition of amines to alkenes and alkynes.

Abstract: 8.4.5. Nitromercuration Reactions 3878 9. Hydroamination of Alkenes and Alkynes under Microwave Irradiation 3878 * To whom correspondence should be addressed. Phone: +49 241 8