Journal
NEW JOURNAL OF CHEMISTRY
Volume 45, Issue 20, Pages 8910-8917Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0nj06095j
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Funding
- National Natural Science Foundation of China [21971058, 21907063]
- Hubei Province Fund for Distinguished Young Scholars [2020CFA085]
- research funds of Chu-Tian Distinguished Professor Scholar
- Hundred-Talent Program youth project at Hubei University [430-090177]
- Natural Science Foundation of Guangdong Province [2019A1515010783]
- Young Talents Program of Guangzhou University [RQ2020080]
- Guangzhou Science and Technology Plan Project [202001010002]
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Heteroleptic copper(I)-phosphine complexes with diverse structures and photophysical properties were synthesized and characterized, showing intense emission properties and high catalytic activity towards azide-alkyne cycloaddition in water.
Heteroleptic copper(i)-phosphine complexes have attracted considerable attention because of their diverse structures, and photophysical and catalytic properties. In this work, a series of heteroleptic diimine-diphosphine Cu(i) complexes (C1-C10) were synthesized quantitively using the designed bipyridine (L1-L4) and bidentate polyphosphine (L5-L8) as functional ligands. These mixed ligand-copper(i) complexes were fully characterized by H-1 and C-13 NMR spectroscopy, electrospray ionization mass spectrometry (ESI-MS) and elemental analysis. The detailed structures of complexes C1, C2, C5, C6, C9 and C10 were confirmed by single-crystal X-ray diffraction analysis. Moreover, these phosphine-Cu(i) complexes exhibited intense emissions either in the solid state or in solution under UV light excitation. The emissive complexes C1-C4 displayed highly sensitive luminescence sensing towards silver ions in a quenching fashion (turn-off). Furthermore, all the phosphine-protected copper(i) complexes exhibited high catalytic activity towards azide-alkyne cycloaddition (CuAAC) in water.
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