Journal
DYES AND PIGMENTS
Volume 128, Issue -, Pages 179-189Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2016.01.026
Keywords
Near-infrared; Absorbing dye; Dithiolene nickel complex; Laser protection; Chemical state; Radical monoanion
Funding
- National Natural Science Foundation of China (NSFC) [U1304212, 21274133]
- Development Foundation for Distinguished Junior Researchers at Zhengzhou University [1421320043]
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Soluble dithiolene nickel complexes are designed and synthesized as near-infrared (NIR) absorbing dyes through the introduction of strong electron-donating groups at the molecular periphery. The resulting complexes are characterized by H-1/C-13 NMR, IR, ESI-MS, UV-vis NIR, TG, DSC, XPS and elemental analysis. The identification results are in accord with the chemical structure of designed dithiolene nickel complexes. The XPS results suggested that the dithiolene ligands in carbazole-containing nickel complex take a radical monoanion, which depends on the substituent electron-donating ability to a large extent. The TG and DSC measurements indicated that the resulting complexes have an excellent thermal stability and take on a glassy state at low temperature. The laser transmittance measurement suggested that the optical filters fabricated through static solution-casting approach with dithiolene nickel complexes as NIR absorbing dyes could be well applied to the NIR laser protection at 1064 nm. (C) 2016 Elsevier Ltd. All rights reserved.
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