Luminescence of some simple tetracoordinate organoboron complexes in solution. Fluorescence from ligand to ligand CT states |
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| Affiliation: | 1. College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, PR China;2. Institute of Functional Materials, Sichuan University of Science & Engineering, Zigong 643000, PR China;3. School of Pharmacy, Guangdong Medical University, Dongguan 523808, PR China;4. School of Chemistry, Monash University, Victoria 3800, Australia;5. Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia;6. Department of Chemistry, Faculty of Science, University of Lucknow, Lucknow 226 007, India |
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| Abstract: | The Lewis base–Lewis acid adducts with the Lewis bases pyrazine, triphenyphosphine, neocuproine (2,9-dimethyl-1,10-phenanthroline), cuproine (2,2′-diquinolyl) and triphenylborane as Lewis acid were prepared. Their electronic spectra are characterized by low-energy electronic transitions which are attributed to phenyl (BPh3) to Lewis base, ligand to ligand charge transfer (LLCT) transitions. These Lewis base-BPh3 complexes display a distinct blue to green fluorescence in solution which originates from the lowest-energy LLCT singlets. |
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