Luminiscent Platinum(II) Complexes. Electronic Spectroscopy of Platinum(II) Complexes of 2,2':6',2''-Terpyridine (terpy) and p-Substituted Phenylterpyridines and Crystal Structure of

Article abstract of DOI:10.1039/DT9930002933

The complexes (n+) (terpy = 2,2':6',2''-terpyridine; L' = Cl, Br, I, N3 or SCN(1-), n = 1; L' = NH3, n = 2) have been prepared and their spectroscopic and emission properties studied.Absorption bands are found at 300-350 and 370-450 nm, which are assigned to the intraligand and metal-to-ligand charge-transfer (m.l.c.t.) transitions, respectively.The complex ClO4 (R' = C6H4OMe-p, C6H4Me-p, C6H4Br-p or C6H4CN-p) were prepared by the reaction of K2 with 4'R-terpy in water-MeCN.Unlike (n+) which show emission in the solid state only, (1+) display ³m.l.c.t. emission in fluid solution at room temperature.The crystal structure of has been determined: monoclinic, space group P2₁/n, a = 13.808(4), b = 6.873(1), c = 19.477(5) Angstroem, β = 105.54(2) deg, and Z = 4.In the unit cell, two (1+) cations stack in a head-to-tail fashion with an intermolecular Pt<*>Pt distance of 3.329(1) Angstroem.The solid-state emission of is similar to that of the ³(d_?*?^b) emission of the dinuclear complex 3 (L = guadinate) having intramolecular Pt<*>Pt separations of 3.090(1) and 3.071(1) Angstroem.

Full text of DOI:10.1039/DT9930002933

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