Room-temperature emission from platinum(II) complexes intercalated into zirconium phosphate-layered materials.
The direct ion exchange of chloro(2,6-bis(N-methylbenzimidazol-2-yl)pyridine)platinum(II) ([Pt(Me(2)bzimpy)Cl]+) and chloro(2,2':6',2' '-terpyridine)platinum(II) ([Pt(tpy)Cl]+) complexes within a zirconium phosphate (ZrP) framework has been accomplished. The physical and spectroscopic properties of [Pt(Me(2)bzimpy)Cl]+ and [Pt(tpy)Cl]+ intercalated in ZrP were investigated by X-ray powder diffraction and X-ray photoelectron, infrared, absorption, and luminescence spectroscopies. In contrast to unintercalated complexes in fluid solution, which do not emit at room temperature, both intercalated materials in the solid state and in colloidal suspensions exhibit intense emissions at room temperature. A [Pt(Me(2)bzimpy)Cl]+-exchanged ZrP colloidal methanol suspension gives rise to an emission at 612 nm that originates from a lowest (3)MMLCT[dsigma*(Pt) --> pi*(tpy)] state (MMLCT = metal-metal-to-ligand charge transfer) characteristic of strong Pt...Pt interactions. A [Pt(tpy)Cl]+-exchanged ZrP colloidal aqueous suspension exhibits a strong emission band at 600 nm. The accumulated data demonstrate that at high concentrations, [Pt(Me(2)bzimpy)Cl]+ and [Pt(tpy)Cl]+ ions can serve as luminescent pillars inside the ZrP framework.
Rivera
Eladio J
EJ
Department of Chemistry, University of Puerto Rico, P.O. Box 23346, Río Piedras, Puerto Rico 00931.
Figueroa
Cristina
C
Colón
Jorge L
JL
Grove
Levi
L
Connick
William B
WB
D002621:Chemistry / Q000379:methods*; D007477:Ions; D008027:Light; D000432:Methanol / Q000737:chemistry; D008956:Models, Chemical; D008968:Molecular Conformation; D015394:Molecular Structure; D010984:Platinum / Q000032:analysis* / Q000737:chemistry*; D017671:Platinum Compounds / Q000737:chemistry*; D011208:Powders; D013052:Spectrometry, X-Ray Emission / Q000379:methods; D013053:Spectrophotometry / Q000379:methods; D013696:Temperature; D014961:X-Ray Diffraction; D015040:Zirconium / Q000032:analysis* / Q000737:chemistry
D007477:Ions; D017671:Platinum Compounds; D011208:Powders; C027006:zirconium phosphate; D010984:Platinum; D015040:Zirconium; D000432:Methanol