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Platinum(II) acetylide complexes with star- and V-shaped configurations possessing good trade-off between optical transparency and optical power limiting performance

Abstract

By employing the central ligand with desired structures, two series of Pt(II) acetylide complexes containing dimesitylborane (–B(Mes)2) and phenyl units as the terminal groups with star- and V-shaped configurations have been synthesized. The photophysical investigations have indicated that the –B(Mes)2 group can enhance the triplet (T1) emission of the concerned Pt(II) acetylide molecules by enhancing the mixing of molecular orbitals from organic ligands and Pt(II) centers. The much higher T1 emission intensity associated with TEB-Pt-B, CAZ-Pt-B and TPA-Pt-B can render them much stronger optical power limiting (OPL) response than their counterparts TEB-Pt-Ph, CAZ-Pt-Ph and TPA-Pt-Ph terminated with the phenyl groups. In addition, the OPL ability of TPA-Pt-B for 532 nm nanosecond laser pulse can even surpass that of the state-of-the-art OPL material C60. In addition, most of the Pt(II) acetylide complexes can show OPL figure of merit factor σex/σo higher than C60. Importantly, the star-shaped molecular configuration employed by the Pt(II) acetylide units can show the advantage of introducing more Pt(II) centers to the molecular skeleton while at the same time maintaining the optical transparency of the concerned Pt(II) acetylide complexes. So, this research can open a new outlet for fulfilling the optimized trade-off between OPL activity and optical transparency for OPL materials based on the reverse saturable absorption (RSA) mechanism.

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Publication details

The article was received on 06 Aug 2017, accepted on 09 Oct 2017 and first published on 10 Oct 2017


Article type: Paper
DOI: 10.1039/C7TC03542J
Citation: J. Mater. Chem. C, 2017, Accepted Manuscript
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    Platinum(II) acetylide complexes with star- and V-shaped configurations possessing good trade-off between optical transparency and optical power limiting performance

    C. Yao, Z. Tian, D. Jin, Z. Feng, Y. Sun, X. Yang, G. Zhou and W. (. Wong, J. Mater. Chem. C, 2017, Accepted Manuscript , DOI: 10.1039/C7TC03542J

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