title: Polyelectrolyte-induced self-assembly of positively charged alkynylplatinum(II)-terpyridyl complexes in aqueous media.
abstract: Polyelectrolytes carrying multiple negative charges were found to induce the aggregation and self-assembly of the positively charged platinum(II)-terpyridyl complexes in aqueous media. The aggregation and self-assembly of the complexes were driven by electrostatic interactions between the polymer and the complex, and by terpyridine ligand pi-pi stacking and platinum-platinum (metal-metal) interactions. As a result, remarkable UV/Vis and emission spectral changes were observed. The spectroscopic property changes were related to the structural properties of the metal complexes as well as the polyelectrolytes. The induced self-assembly of the platinum complexes was also strongly affected by the solution properties of the aqueous media, for example, the solution pH, ionic strength, and the percentage of organic solvent added.
authors.affiliation: Center for Carbon-Rich Molecular and Nanoscale Metal-Based Materials Research, Department of Chemistry and HKU-CAS Joint Laboratory on New Materials, The University of Hong Kong, Hong Kong, PR China.
authors.forename: Cong
authors.initials: C
authors.lastname: Yu
authors.forename: Kenneth Hoi-Yiu
authors.initials: KH
authors.lastname: Chan
authors.forename: Keith Man-Chung
authors.initials: KM
authors.lastname: Wong
authors.forename: Vivian Wing-Wah
authors.initials: VW
authors.lastname: Yam
mesh_terms: D000480:Alkynes / Q000737:chemistry*; D004573:Electrolytes / Q000737:chemistry*; D004583:Electrons; D006863:Hydrogen-Ion Concentration; D015394:Molecular Structure; D009944:Organoplatinum Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D009994:Osmolar Concentration; D011108:Polymers / Q000737:chemistry*; D011725:Pyridines / Q000737:chemistry*; D012996:Solutions / Q000737:chemistry; D014867:Water / Q000737:chemistry
chemical_list: D000480:Alkynes; D004573:Electrolytes; D009944:Organoplatinum Compounds; D011108:Polymers; D011725:Pyridines; D012996:Solutions; D014867:Water