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Title: Novel Au-I polyynes and their high optical power limiting performances both in solution and in prototype devices
Authors: Tian, ZZ
Yang, XL
Liu, BA
Zhao, J
Zhong, DK
Wu, Y
Zhou, GJ
Wong, WY 
Issue Date: 2018
Publisher: Royal Society of Chemistry
Source: Journal of materials chemistry C, 14 June 2018, v. 6, no. 22, p. 6023-6032 How to cite?
Journal: Journal of materials chemistry C 
Abstract: Three novel Au-I polyynes have been prepared in high yield by copolymerization between an Au-I complex precursor and different ethynyl aromatic ligands. The investigation of their photophysical behavior has indicated that forming polyynes through polymerization not only maintains the high transparency of the corresponding Au-I polyynes similar to those of their corresponding small molecular Au-I acetylides, but also effectively enhances their triplet (T1) emission ability. Critically, owing to their enhanced T1 emission ability, all the Au-I polyynes exhibit a stronger optical power limiting (OPL) ability against a 532 nm laser than the corresponding small molecular Au-I acetylides. The Au-I polyynes based on fluorene and triphenylamine ligands show even better OPL performance than the state-of-the-art OPL material C60, indicating their great potential in the field of laser protection. More importantly, in a prototype OPL device made by doping the fluorene-based Au-I polyyne into a polystyrene (PS) solid matrix, substantially improved OPL activity has been observed compared with that in the solution, demonstrating its great potential for practical application. All these results have provided a new strategy to achieve a balance between high OPL activity and good transparency for OPL materials, representing a valuable attempt towards developing new OPL materials with high performance to cope with the key problems in the field of nonlinear optics.
ISSN: 2050-7526
EISSN: 2050-7534
DOI: 10.1039/c8tc01539b
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