Luminescent amphiphilic 2,6-bis(1,2,3-triazol-4-yl)pyridine-platinum(II) complexes: Synthesis, characterization, electrochemical, photophysical, and Langmuir-Blodgett film-formation studies

A new series of platinum(II) complexes with tridentate ligands 2,6-bis(1-alkyl-1,2,3-triazol-4-yl)pyridine and 2,6-bis(1-aryl-1,2,3-triazol-4- yl)pyridine (N7R), [Pt(N7R)Cl]X (1-7) and [Pt(N7R)(Ci¨£CR′)]X (8-17; R=n-C4H9, n-C8H17, n-C 12H25, n-C14H29, n-C 18H37, C6H5, and CH 2-C6H5; R′=C6H5, C6H4-CH3-p, C6H 4-CF3-p, C6H4-N(CH3) 2-p, and cholesteryl 2-propyn-1-yl carbonate; X=OTf^-, PF6^-, and Cl^-), has been synthesized and characterized. Their electrochemical and photophysical properties have also been studied. Two amphiphilic platinum(II)-2,6-bis(1-dodecyl-1,2,3-triazol-4-yl) pyridine complexes (3-Cl and 8) were found to form stable and reproducible Langmuir-Blodgett (LB) films at the air/water interface. These LB films were characterized by the study of their surface-pressure-molecular-area (π-A) isotherms, XRD, and IR and polarized-IR spectroscopy. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.