Development of gold(I) phosphorescent tweezers for sensing applications.
Araceli de AquinoFrancisco J CaparrósGabriel AullónKhai-Nghi TruongKari T RissanenJoao Carlos LimaLaura RodríguezPublished in: Dalton transactions (Cambridge, England : 2003) (2022)
The synthesis of the gold(I) alkynyl-fluorene compound 2 containing a diphosphane (dppb = 1,4-bisdiphenylphosphanebutane) has been easily achieved by the treatment of the previously synthesized [2-ethynylfluorene-Au] n polymer (1) and the corresponding dppb diphosphane in an adequate 2 : 1 stoichiometry. Compound 2 shows a boat-tweezer conformation that makes it ideal for being used as a host in molecular recognition processes. Different polyaromatic hydrocarbons (PAHs) and polyfluorinated compounds (PFCs) have been used as guests and a stronger interaction has been detected for PAHs, especially for anthracene, in agreement with spectrofluorometric titrations and the calculated values of the association constants, which is confirmed by DFT calculations. Compound 2 has then been immobilized in different organic matrices, in order to enhance room temperature phosphorescence (RTP). This promotes sensing with dual emission and furthermore in the case of the analytes under investigation, phosphorescence is observed in a range of wavelengths that do not coincide with the fluorescence emission of PAHs and PFCs.
Keyphrases
- room temperature
- polycyclic aromatic hydrocarbons
- ionic liquid
- heavy metals
- health risk assessment
- density functional theory
- human health
- molecular dynamics simulations
- single molecule
- molecular dynamics
- risk assessment
- sensitive detection
- crystal structure
- water soluble
- mass spectrometry
- drinking water
- climate change
- visible light