New C∧N∧C Bis-Cyclometalated Platinum(II) Complexes: Synthesis, Structures, and Photophysical Properties

Reference:

Fuertes Lorda, S., Brayshaw, S. K., Raithby, P. R., Schiffers, S. and Warren, M. R., 2012. New C∧N∧C Bis-Cyclometalated Platinum(II) Complexes: Synthesis, Structures, and Photophysical Properties. Organometallics, 31 (1), pp. 105-119.

Related documents:

Preview

PDF (Raithby_Organometallics_2012_31_1_105.pdf) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader Download (1439kB) | Preview

Official URL:

http://dx.doi.org/10.1021/om200589q

Related URLs:

• http://www.scopus.com/inward/record.url?scp=84856904008&partnerID=8YFLogxK

Abstract

The reaction of a new ligand, ethyl 2,6-diphenylisonicotinate (EtO(2)C-CAN boolean AND C-H(2)), with K(2)PtCl(4) in acetic acid affords the monocyclometalated complex [{(EtO(2)C-CANAC-H)Pt(mu-Cl)}(2)] (1), which transforms to the bis-cyclometalated derivative [Pt(EtO(2)C-C boolean AND N boolean AND C)(DMS0)] (2) when heated in hot DMSO. Complex 2 is the precursor for preparing a new series of neutral mononuclear bis-cyclometalated complexes [Pt(EtO(2)C-CAN boolean AND C)(L)] (L = tht (3), PPh(3) (4), CN-(t)Bu (5), py (6), py-tBu (7), py-NH(2) (8), py-CN (9), py-CONH(2) (10)). These new complexes have been characterized spectroscopically, and structures of 2-10 have been determined crystallographically. Within each crystal structure the individual molecules pack in a head-to-tail arrangement. Noncovalent interactions, including pi center dot center dot center dot pi; C-H center dot center dot center dot O, C-H center dot center dot center dot N, N-H center dot center dot center dot Pt, N-H center dot center dot center dot pi, C-H center dot center dot center dot O, and N-H center dot center dot center dot O, contribute significantly to the supramolecular structures displayed by these complexes in the solid state. All complexes display UV-vis absorptions in dichloromethane solution. Excitation and emission studies as well as lifetime measurements are described and can be correlated to the solid-state structures of the complexes. DFT and TDDFT computational studies have been performed on 5 and 8 which support the conclusions drawn from the photophysical studies.

Export

Actions (login required)