A Selective Metal-Mediated Approach for the Efficient Self-Assembling of Multi-Component Photoactive Systems

作者：Iengo Elisabetta^*; Cavigli Paolo; Gamberoni Marta; Indelli M Teresa

来源：European Journal of Inorganic Chemistry, 2014, 2014(2): 337-344.

DOI：10.1002/ejic.201300998

• Self-assembly
• Porphyrinoids
• Coordination
• Energy transfer
• Electron transfer

We report on the efficient use of different coordinative affinities to quantitatively construct a three-component multichromophore system containing one free-base porphyrin, one aluminium(III) monopyridylporphyrin, and one ruthenium(II) tetraphenylporphyrin in a single step. The Al-III monopyridylporphyrin plays the pivotal role in directing the correct self-assembly process, and it behaves as the antenna unit for the photoinduced processes of interest. A two-component system, containing the same free-base porphyrin and one aluminium(III) tetraphenylporphyrin, was prepared for comparative studies. Both systems are remarkably stable in chlorinated solutions. Their photophysical behaviour was studied in detail by stationary and time-resolved emission techniques. In the two-component system, fast and efficient singlet energy transfer from the Al-porphyrin to the free-base porphyrin is observed; in the three-component system, upon excitation of the Al-porphyrin, a fast (%26lt;250 ps) electron transfer process from the Ru-porphyrin to the aluminium-porphyrin is observed.

• 出版日期2014-1