Journal
DYES AND PIGMENTS
Volume 182, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2020.108591
Keywords
Schiff base; Pt(II) complex; Photophysics; Electrochemical properties; Optical power limiting
Funding
- Natural Science Foundation of Jiangsu Province-Outstanding Youth Foundation [BK20170104]
- National Natural Science Foundation of China [21602106]
- Six Talent Peaks Project of Jiangsu Province [XCL-037]
- Strategic Pioneer Program on Space Science, Chinese Academy of Sciences [XDA15013100, XDA15013101]
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Pt(II) complexes with tetradentate Schiff base ligands (Pt-1-Pt-5) were prepared, and their detailed photophysics were studied using steady-state, transient spectroscopies and density functional theory systematically. Pt-1-Pt-5 all exhibit (1)pi,pi* transitions and metal-to-ligand/intraligand charge transfer transitions in the UV-vis region. Meanwhile, these complexes are emissive in solution at room temperature (lambda(em) = 400-800 nm, phi(em) = 0.008-0.196). Triplet transient absorption (TA) demonstrated that except Pt-3, all complexes exhibit broad and strong triplet excited-state absorption from 400 to 750 nm. What's more, nonlinear transmission experiment demonstrated that Pt-1-Pt-5 show robust reverse saturable absorption (RSA) at 532 nm ns laser pulses. Among them, Pt-5 shows the strongest nonlinear absorption performance, which could potentially be used as optical power limiting (OPL) materials.
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