Gold, porphyrins coordinated

The photophysical properties of 33 +, 34+ and 35 + were investigated in DMF and the results are here summarized [72,75]. In these systems the redox active porphyrins are on different parts of the structure which are held together by the coordinated metal in 33 + and 35 +, whereas in 34+ they are held together only by mechanical bonds and no covalent electron-transfer pathways exist. These systems are characterized by some flexibility of the polyether gold porphyrin appended macrocycle which could cause, upon... 

With a tridentate ligand Au(terpy)Cl3.H20 has, in fact, AuCl(terpy)2"1" with weakly coordinated chloride and water while Au(terpy)Br(CN)2 has square pyramidal gold(III) the terpyridyl ligand is bidentate, occupying the axial and one basal position [124]. Macrocyclic complexes include the porphyrin complex Au(TPP)Cl (section 4.12.5) cyclam-type macrocyclic ligands have a very high affinity for gold(III) [125],... 

The homoleptic Cu(l)2 complex and the bis-porphyrinic rotaxane 2+ both incorporate the same coordinating core Cu(dpp). In the rotaxane, one of the coordinating moieties (dpp) is incorporated in a macrocyde, which plays the role of a wheel. The second coordinating core is incorporated in the molecular thread - the axle of the rotaxane - the two ends of which bear the gold and the zinc porphyrin, respectively. 

Fig. 37 Scheme of photocurrent generation. A porphyrin antenna was grown from a SAM on a gold surface by self-complementary coordination followed by covalent immobilization by a ring-closing metathesis reaction... 

Two identical zinc/gold bisporphyrins can be assembled into a tetrameric porphyrin ensemble by coordinating the 1,10-phenanthroline groups to a copper(I) cation (Figure 8) [17]. Immediately after excitation with a 1-ps laser pulse at 586 nm, where only the zinc porphyrin subunit absorbs, the... 

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