Journal
FRONTIERS IN CHEMISTRY
Volume 10, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fchem.2022.1083757
Keywords
carbazole; Gold(I) complexes; different substituents; aggregation-induced phosphorescent emission; mechano-responsive phosphorescence
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Funding
- National Natural Science Foundation of China [22061018]
- Natural Science Foundation for Distinguished Young Scholars of Jiangxi Province [20212ACB213003]
- Academic and Technical Leader Plan of Jiangxi Provincial Main Disciplines [20212BCJ23004]
- Shijiazhuang University Doctoral Research Startup Fund Project [22BS005]
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A series of carbazole-containing gold(I) complexes with different substituents were designed and synthesized, showing aggregation-induced phosphorescent emission phenomena and reversible mechanoluminochromic properties in some cases.
A series of carbazole-containing gold(I) complexes modified with different substituents were successfully designed and synthesized, and their molecular structures were characterized by nuclear magnetic resonance spectroscopy and mass spectrometry. The aggregation-induced behaviors of these gold(I) complexes were studied by ultraviolet/visible and photoluminescence spectroscopy. Meanwhile, their mechanical force-responsive emissive properties were also investigated via solid-state photoluminescence spectroscopy. Interestingly, all these gold(I)-based luminogenic molecules were capable of exhibiting aggregation-induced phosphorescent emission phenomena. Furthermore, their solids of three gold(I) complexes displayed contrasting mechano-responsive phosphorescence features. More specifically, trifluoromethyl or methoxyl-substituted luminophores 1 and 3 demonstrated mechanochromic behaviors involving blue-shifted phosphorescence changes, and their mechanoluminochromic phenomena were reversible. However, the solid-state phosphorescence of phenyl-substituted luminophor 2 was not sensitive to external mechanical force.
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