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|dc.title||Ligand perturbations on fluorescence of dinuclear platinum complexes of 5,12-diethynyltetracene: A spectroscopic and computational study|
|dc.identifier.citation||Nguyen, M.-H., Wong, C.-Y., Yip, J.H.K. (2013-03-25). Ligand perturbations on fluorescence of dinuclear platinum complexes of 5,12-diethynyltetracene: A spectroscopic and computational study. Organometallics 32 (6) : 1620-1629. ScholarBank@NUS Repository. https://doi.org/10.1021/om300904b|
|dc.description.abstract||To understand how the PtII ion perturbs the electronic structures of tetracene, 10 dinuclear [X(Et3P)2Pt II]2-5,12-diethynyltetracene complexes with different auxiliary ligands were synthesized. Interactions between the PtII ion and 5,12-diethynyltetracene were probed spectroscopically and computationally. The dinuclear [X(Et3P)2PtII] 2-5,12-diethynyltetracene complexes exhibit red-shifted absorption and fluorescence in comparison with those of 5,12-bis(triisopropylsilylethynyl) tetracene, with the neutral complexes with π-donating auxiliary ligands showing a larger red shift than the cationic complexes with π-accepting ligands. Electronic structures of the complexes and effects of the metal ions and the ligands on the electronic transitions of the complexes were investigated by TD-DFT calculations, the results of which showed that the electronic structure of the 5,12-diethynyltetracene core is perturbed by π interactions with the Pt fragments, the extent of which depends on the energies of the dπ orbitals of the Pt fragments. © 2013 American Chemical Society.|
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