Itoh Group Literature Review

Nature Chemistry. doi:10.1038/nchem.2503 Authors: Marcus Schulze, Valentin Kunz, Peter D. Frischmann & Frank Würthner   http://www.nature.com/nchem/journal/vaop/ncurrent/full/nchem.2503.html http://www.nature.com/nchem/journal/vaop/ncurrent/pdf/nchem.2503.pdf Designing improved catalysts is predicated on understanding how they work. Now, by positioning three ruthenium centres in a macrocyclic framework, a remarkable acceleration of catalytic water oxidation has been achieved. Detailed mechanistic studies revealed that the catalyst operates through the ‘water nucleophilic attack’ pathway—similar to the natural oxygen-evolving cluster of photosystem II.    

Journal of the American Chemical Society by Imtiyaz Ahmad Bhat, Dipak Samanta and Partha Sarathi Mukherjee  /  9h  //  keep unread  //  hide  //  preview http://pubs.acs.org/doi/abs/10.1021/jacs.5b06628 http://pubs.acs.org/doi/pdfplus/10.1021/jacs.5b06628   We found that Pd(II) ion ( M ) and the smallest 120° bidentate donor pyrimidine ( L a ) self-assemble into a mononuclear M ( L a ) 4 complex ( 1a ) instead of the expected smallest M 12 ( L a ) 24 molecular ball ( 1 ), presumably due to the weak coordination nature of the pyrimidine. To construct such a pyrimidine bridged nanoball, we employed a new donor tris(4-(pyrimidin-5-yl)phenyl)amine ( L ); which upon selective complexation with Pd(II) ions resulted in the formation of a pregnant M 24 L 24 molecular nanoball ( 2 ) consisting of a pyrimidine-bridged Pd 12 baby-ball supported by a Pd 12 larger mother-ball. The formation of the baby-ball ...

Hiroki Takezawa   † ,  Shouta Akiba   † ,  Takashi Murase   ‡ , and  Makoto Fujita   * † †  Department of Applied Chemistry, School of Engineering,  The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656,  Japan ‡  Department of Material and Biological Chemistry, Faculty of Science,  Yamagata University , 1-4-12 Kojirakawa-machi, Yamagata-shi, Yamagata 990-8560,  Japan J. Am. Chem. Soc. , Article ASAP DOI:  10.1021/jacs.5b03618 Publication Date (Web): May 27, 2015 Copyright © 2015 American Chemical Society http://pubs.acs.org/doi/abs/10.1021/jacs.5b03618 Abstract Phthalein dyes in the quinone dianion form (pseudo- D 3 , colored) are transformed into the lactone dianion form (pseudo- T d , colorless) through encapsulation in a  T d -symmetric host even under basic conditions (pH ∼10). The compatibility in size and symmetry between the lactone and the cavity is essential to the t...