Synthesis and conformation of macrocyclic porphyrin dimers with potentially spacious cavities
作者:Christopher A. Hunter、M. Nafees Meah、Jeremy K. M. Sanders
DOI:10.1039/c39880000692
日期:——
The importance of π–π donor–acceptor interactions is demonstrated in the synthesis and conformation of macrocyclicporphyrindimers covalently linked by biphenyl or pyromellitimide bridges.
Thermodynamics of induced-fit binding inside polymacrocyclic porphyrin hosts
作者:Harry L. Anderson、Christopher A. Hunter、M. Nafees Meah、Jeremy K. M. Sanders
DOI:10.1021/ja00171a017
日期:1990.7
The binding of bis-amine ligands to a series of cyclic zincporphyrindimers has been characterized by NMR and electronic spectroscopy. The cavity within the flexible dimers is kept closed by pi}-pi} interactions between the porphyrin and aromaticbridging groups but can be opened by ligands whose binding is strong enough to overcome this energetic barrier. Analysis of the binding of these bifunctional
Modelling the photosynthetic reaction centre: photoinduced electron transfer in a pyromellitimide-bridged ‘special pair’ porphyrin dimer
作者:J. A. Cowan、Jeremy K. M. Sanders、Godfrey S. Beddard、R. J. Harrison
DOI:10.1039/c39870000055
日期:——
resulting doubly-bridged compound showing rapid electrontransfer between the ‘specialpair’ porphyrindimer and the pyromellitimide acceptor; both the excited singlet and charge-separated states have been observed in picosecond absorption and emission experiments, and a closely related side-by-side analogue lacks these ‘specialpair’ properties, electrontransfer being ca. 1000 times slower.