title: A "molecular pivot-hinge" based on the pH-regulated intramolecular switching of Pt-Pt and pi-pi interactions.
abstract: The binuclear cycloplatinated complex {[Pt(L)]2(mu-dppm)}2+ (1), where HL is a new cyclometalating ligand 2-phenyl-6-(1H-pyrazol-3-yl)pyridine, is found to behave as a molecular pivot-hinge in which the closing and opening of the hinge is effected by the reversible formation and cleavage of the Pt-Pt d8-d8 interaction and the intramolecular pi-pi interaction mediated by the protonation/deprotonation of the 1-pyrazolyl-NH on the cyclometalating ligand L.
authors.affiliation: Department of Biology & Chemistry, City University of Hong Kong, Tat Chee Avenue, Hong Kong SAR, China.
authors.forename: Chi-Kin
authors.initials: CK
authors.lastname: Koo
authors.forename: Benny
authors.initials: B
authors.lastname: Lam
authors.forename: Sze-Kar
authors.initials: SK
authors.lastname: Leung
authors.forename: Michael Hon-Wah
authors.initials: MH
authors.lastname: Lam
authors.forename: Wai-Yeung
authors.initials: WY
authors.lastname: Wong