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Synthesis, characterization and oxygen‐sensing properties of a novel luminescent Cu(I) complex
Author(s) -
Shi Linfang,
Li Bin,
Lu Shaozhe,
Zhu Dongxia,
Li Wenlian
Publication year - 2009
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.1522
Subject(s) - microsecond , chemistry , luminescence , phosphine , quenching (fluorescence) , excited state , oxygen , crystal structure , fluorescence , elemental analysis , analytical chemistry (journal) , photochemistry , inorganic chemistry , crystallography , organic chemistry , catalysis , optoelectronics , quantum mechanics , astronomy , physics , nuclear physics
A novel luminescent copper(I) complex with formula [Cu(PPh 3 ) 2 (PIP)]BF 4 (PPh 3 = triphenyl phosphine, PIP = 2‐phenyl‐1 H ‐imidazo[4,5‐ f ][1,10]phenanthroline) has been synthesized and characterized by 1 H NMR, IR, elemental analysis and X‐ray crystal structure analysis. In solid state, it displays broad band emission upon excitation at λ = 420 nm with the emission maximum locates at 551 nm. Its excited‐state lifetime is in the microsecond time scale (3.02 µs); as a result, its emission intensity is sensitive to oxygen concentration and shows oxygen‐sensing properties after being encapsulated into mesoporous silica MCM‐41. For the system with 60 mg/g loading level, a sensitivity ( I 0 / I ) of 4.35, a fluorescence quenching time ( t Q ) of 5 s and a recovery time ( t R ) of 36 s were achieved. Even after aging for 5 months, the sensitivities of the three loading level systems can be retained, ignoring the measurement error, which indicates that they possess long‐term stability. Copyright © 2009 John Wiley & Sons, Ltd.