1554398-76-3Relevant academic research and scientific papers
A dual-emissive phosphine-borane Lewis pair with a U-shaped linker: Impact of methylation and complexation on fluoride binding affinity
Li, Yufei,Kang, Youngjin,Lu, Jia-Sheng,Wyman, Ian,Ko, Soo-Byung,Wang, Suning
, p. 964 - 973 (2014)
To investigate phosphine to borane through-space charge transfer and its utility in anion sensing and the formation of metal complexes, a phosphine-borane Lewis pair (1) connected by a U-shaped linker has been synthesized. 1 could be readily converted to a phosphonium salt (2) and two 2:1 complexes with Au(I) (1-Au) and Pt(II) (1-Pt). The photophysical properties of the new compounds were examined and compared. Compound 1 displayed an intense P → B CT transition and a bright solvent-dependent dual emission that is switchable by fluoride ions. 2 and 1-Pt showed a turn-off and a turn-on fluorescent response, respectively, toward fluoride ions. The binding constant of 2 with F- was found to be 2 orders of magnitude greater than that of 1. The mechanism that is responsible for the distinct fluorescence response of 1, 2, and 1-Pt toward fluoride ions is proposed.
