Ruthenium(II) pyridylamine complexes with diimine ligands showing reversible photochemical and thermal structural change

Chemistry : a European Journal
Takahiko KojimaShunichi Fukuzumi

Abstract

Ruthenium(II)-TPA-diimine complexes, [Ru(TPA)(diimine)]2+ (TPA=tris(2-pyridylmethyl)amine; diimine=2,2'-bipyridine (bpy), 2,2'-bipyrimidine (bpm), 1,10-phenanthroline (phen)) were synthesized and characterized by spectroscopic and crystallographic methods. Their crystal structures demonstrate severe steric hindrance between the TPA and diimine ligands. They exhibit drastic structural changes on heating and photoirradiation at their MLCT bands, which involve partial dissociation of the tetradentate TPA ligand to exhibit a facially tridentate mode accompanied by structural change and solvent coordination to give [Ru(TPA)(diimine)(solvent)]2+ (solvent=acetonitrile, pyridine). The incoming solvent molecules are required to have pi-acceptor character, since sigma-donating solvent molecules do not coordinate. The thermal process is irreversible dissociation to give the solvent-bound complexes, which takes place by an interchange associative mechanism with large negative activation entropies. The photochemical process is a reversible reaction reaching a photostationary state, probably by a dissociative mechanism involving a five-coordinate intermediate to afford the same product as obtained in the thermal reaction. Quantum yields of t...Continue Reading

References

Sep 18, 1999·Nature·N KoumuraB L Feringa
Jul 18, 2001·Journal of the American Chemical Society·J J RackH B Gray
Jan 1, 1986·Die Naturwissenschaften·R R TheimerI Rosch
Jan 5, 2002·Chemical Reviews·Masahiro Irie
Jan 5, 2002·Chemical Reviews·Yasushi Yokoyama
Oct 4, 2002·Chembiochem : a European Journal of Chemical Biology·Oliver P Ernst, Franz J Bartl
Jun 12, 2003·Chemical Reviews·Chin-Chuan WeiDennis J Stuehr
Jan 30, 2004·Nature·Hiroyasu ItohKazuhiko Kinosita
Mar 20, 2004·Science·Jovica D BadjicJ Fraser Stoddart
Apr 15, 2004·Angewandte Chemie·Lasheng JiangJunzo Otera
May 27, 2004·Journal of the American Chemical Society·Anne PetitjeanJean-Marie Lehn
Mar 24, 2006·Nature·Takahiro MuraokaTakuzo Aida
Apr 13, 2006·Journal of the American Chemical Society·Javier VicarioBen L Feringa
Nov 2, 2006·Journal of the American Chemical Society·Aaron A Rachford, Jeffrey J Rack
Dec 19, 2006·Chemical Society Reviews·Sourav Saha, J Fraser Stoddart
May 22, 2007·Dalton Transactions : an International Journal of Inorganic Chemistry·Hani AmouriFrancesco Barigelletti
Jan 15, 2008·Journal of the American Chemical Society·Soushi MiyazakiShunichi Fukuzumi

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Citations

Oct 26, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Tomoya IshizukaTakahiko Kojima
Jan 13, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Hiroumi MitomeTakahiko Kojima
Jan 13, 2010·Chemical Communications : Chem Comm·Ming-Sheng WangGuo-Cong Guo
May 24, 2014·Dalton Transactions : an International Journal of Inorganic Chemistry·Christoph NagelUlrich Schatzschneider
Apr 21, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Takahiko Kojima
May 5, 2011·Chemistry : a European Journal·Tomoya IshizukaTakahiko Kojima
May 25, 2013·Inorganic Chemistry·Christopher J WhiteoakGeorge J P Britovsek

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