2,2’:6,2”-terpyridine moiety

However, this is not to say that it is impossible to alkylate cationic complexes. The reaction of the ruthenium(n) complex [Ru(5.16)2]2+, in which only the three chelating nitrogen atoms of the 2,2 6 ,2"-terpyridine moiety are co-ordinated to the metal, with iodomethane in acetonitrile gives the alkylated product [Ru(5.17)2]4+ in near quantitative yield. 

Ideally, from a macromolecular subunit position control perspective, directed approaches toward network construction are desirable. Indeed, the construction of dendrimers possessing metal-ligating, 4-substituted, 2,2 6, 2"-terpyridine moieties have been reported. 82,83 ... 

Terpyridine moieties have been introduced as a terminal unit of macromolecules. In a subsequent procedure the two-step self-assembly process based on Rum/Run chemistry was used for polymers end-capped with the 2,2/ 6/,2 -terpyridine ligand. More precisely, the terpyridine-functionalized polymers were complexed with RUCI3 to selectively form a mono-complex. In a further step, this mono-complex was reacted under reducing conditions with other uncomplexed 2,2/ 6/,2/-terpyridine-terminated polymer blocks in order to form an asymmetrical AB ruthenium(II) frzs-complex. 

Many aza-crown macrocydic ligands [118] have been used to produce stable, well-shielded lanthanide complexes that have good photophysical properties. The aza-crown macrocydic ligand 19 has a terpyridine moiety incorporated into it to act as a sensitiser. Quantum yields of 0 = 0.18 and 0 = 0.21 were determined in water for the Eu(III) and Tb(III) complexes respectively. 19 is an... 

We selected two types of molecular wires to form desired structures for the electrode. The first has a linear structure with a bis-terpyridine moiety (Lp azobenzene-bridged bis-terpyridine ligand, L2 phenylene-bridged bis-terpyridine ligand), as illustrated in Figure 2. This type of wire can form a linear structure such as a bead curtain. The second has a triangular structure with three terpyridine... 

The rotaxane 13 + [the nomenclature of the rotaxanes described here is 13W n+, where N refers to the coordination number of the metal (4 or 5) and n to its charge] synthesized herein is composed of two subunits a macrocycle and a molecular thread (Fig. 11). The 33-membered macrocycle Mt33 [18, 19] contains two different coordinating sites a terpyridine moiety and a 1, 10-phenanthroline one. 

The multidcntate ligand, possessing two terpyridine moieties and a 2,9-diphenyl-1,10-phenanthroline fragment, was cyclized under high-dilution conditions with Ru(DMSO)4Cl2 to give the 29-membered macrocycle 21, as well as the corresponding dimer 22. Macrocycle 21... 

Platinum(ii)-containing complexes with inherently chiral binaphthol derivatives display a versatile scaffold between random coils and singleturn helical strands, in which the conformational transition is controlled by the Pt... Pt and n-n interactions of allq7nylplatinum(ii) terpyridine moiety upon solvent and temperature modulation. ... 

Fig. 7.12 Possible structure of the luminescent material, which shows the coordination of the terpyridine moieties to ions and the energy transfer as well as a digital photo taken under UV...

Ding and coworkers replaced the terpyridine moieties with a chiral Eeringa s MonoPhos ligand to obtain a UPy-based bifunctional monomer 18 [38]. With the addition of [Rh(cod)2]Bp4 to the solution of 18 in CH2CI2, it could form a linear-assembled polymer with alternative orthogonal P-Rh coordination and UPy dimerization in the main chain (Scheme 10.5). The supramolecular coordination polymer 19 was insoluble in the apolar solvent such as toluene, which assured facile recovery and reusability of this catalyst. More importantly, this kind of heterogeneous catalyst showed excellent reactivity and enantioselectivity in the hydrogenation reaction. 

Different reporter groups have been attached to C5 of uracil, e.g., a number of fluorophores including naphthalene, pyrene, fluor-ene, benzofuran ° and the biaryl derivative (36) that also has an NMR label ( F). The structure of an RNA-DNA hybrid has been examined by EPR using a spin label attached to C5 of du/ A terpyridine moiety has been attached to C5 to chelate metal ions/ Different carbohydrates have been attached via a linker to C5 of dU and the resultant DNA was hybridised to form a three-way junction with the carbohydrate displayed on each arm to probe binding to lectin/ Two nitroimidazole derivatives attached to C5 via a methylene bridge have been described where they form interstrand crosslinks under hypoxic conditions/ The acyclic pyrimidine analogue (37) has been incorporated into the thrombin-binding aptamer where it was found to increase the efficacy of the aptamer/ ... 

Lohmeijer BGG, Schubert US. Water-soluble building blocks for terpyridine-containing supra-molecular polymers synthesis, complexation, and pH stability studies of poly(ethylene oxide) moieties. Macromol Chem Phys 2003 204 1072-1078. 

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