A Pd3L6 supramolecular cage incorporating photoactive [2.2]paracyclophane Units
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[2.2]Paracyclophane (pCp) scaffolds, unlike many -conjugated building blocks, have been rarely explored in supramolecular self-assembly. Herein we report the synthesis and characterization of two ligands, pCpd3py and pCpd4py , composed of a pCp core functionalized at its 7- and 15-positions respectively with 3-pyridyl and 4-pyridyl units. The self-assembly of pCpd4py with Pd2+ metal ions afforded a [Pd3( pCpd4py )6]6+ cage structure, pCpd4py-Pd , where the six pCpd4py ligands doubly bridge each edge of the Pd3 triangular core. The ligand pCpd4py and the palladium cage pCpd4py-Pd have been characterized by NMR spectroscopy, ESI-MS spectrometry and X-ray diffraction analyses and their photophysical properties investigated by steady-state and time-resolved emission spectroscopy as well as Time-Dependent Density Functional Theory calculations.
Rota Martir , D , Delforce , L , Cordes , D B , Slawin , A M Z , Warriner , S , Jacquemin , D & Zysman-Colman , E 2019 , ' A Pd 3 L 6 supramolecular cage incorporating photoactive [2.2]paracyclophane Units ' , Inorganic Chemistry Frontiers , vol. Advance Article . https://doi.org/10.1039/C9QI01147A
Inorganic Chemistry Frontiers
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DescriptionEZ-C acknowledges the University of St Andrews and EPSRC (EP/M02105X/1) for financial support. We thank the EPSRC UK National Mass Spectrometry Facility at Swansea University for analytical services. We thank Umicore AG for the gift of materials.
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