期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 123, 期 25, 页码 15685-15692出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.9b02168
关键词
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资金
- Natural Science Foundation of Jiangsu Province Outstanding Youth Foundation [BK20170104]
- National Natural Science Foundation of China [21602106]
- Six Talent Peaks Project in Jiangsu Province [XCL-037]
- Strategic Pioneer Program on Space Science, Chinese Academy of Sciences [XDA15013100, XDA15013101]
- National Key Research And Development Program of China [2017YFB0307202]
- Undergraduate Innovation and Entrepreneurship Training Program [2019DC0424]
A new Pt(II) acetylide metallogel material (Pt-1) with 1,3,5-triazine core and 3,4,5-tris(dodecyloxy)benzamide terminal units was synthesized and characterized. Its photo-physical properties were studied by UV-vis absorption, emission, transient absorption, Z-scan, and nonlinear transmission spectroscopy/technique. Pt-1 exhibits ligand-centered n-pi* and (1)pi-pi* transitions in the UV region, and broad, strong absorption bands mixed with intraligand charge transfer ((ILCT)-I-1)/ligand-to-ligand charge transfer ((LLCT)-L-1)/metal-to-ligand charge transfer ((MLCT)-M-1) in the visible spectral region (forward slashes expression indicates that all three processes can be involved, in any proportion). Meanwhile, it shows much stronger triplet transient absorption from the visible to near-infrared region. Thus, the optical power-limiting (OPL) performance of Pt-1 was demonstrated in solution and gel state for a 532 nm nanosecond laser pulse, both of which exhibit a significant decrease of output energy density when the incident light energy increases. In addition, the gel properties of Pt-1 in 15 solvents were studied and a gel sheet with good optical transparency was obtained after cooling the heating sols in dimethylformamide solution. This study can open a new outlet for OPL gelation materials and devices on the basis of the reverse saturable absorption mechanism.
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