0000000001308266

AUTHOR

I. Matera

Proton and metal binding by cyclen-based highly rigid cryptands.

The basicity properties of the two cryptands L1 and L2, featuring, respectively, a dibenzofuran or a diphenyl ether moiety bridging the 1,7 positions of a 1,4,7,10-tetraazacyclododecane macrocycle (cyclen) have been studied by means of potentiometric, UV-vis and fluorescence emission measurements. Both ligands show a high basicity in the first protonation step, the first basicity constant of L1 being too high to be measured in aqueous solution. The crystal structure of {[HL1]L1}(+) shows that the NH(2)(+) group is involved in an intramolecular hydrogen bonding network, which justifies the observed high basicity in solution. (1)H, (13)C NMR, UV-vis and fluorescence emission measurements show…

research product

CCDC 787307: Experimental Crystal Structure Determination

Related Article: C.Bazzicalupi, A.Bencini, S.Ciattini, F.Denat, P.Desogere, C.Goze, I.Matera, B.Valtancoli|2010|Dalton Trans.|39|11643|doi:10.1039/c0dt00948b

research product

CCDC 787306: Experimental Crystal Structure Determination

Related Article: C.Bazzicalupi, A.Bencini, S.Ciattini, F.Denat, P.Desogere, C.Goze, I.Matera, B.Valtancoli|2010|Dalton Trans.|39|11643|doi:10.1039/c0dt00948b

research product

CCDC 787305: Experimental Crystal Structure Determination

Related Article: C.Bazzicalupi, A.Bencini, S.Ciattini, F.Denat, P.Desogere, C.Goze, I.Matera, B.Valtancoli|2010|Dalton Trans.|39|11643|doi:10.1039/c0dt00948b

research product

CCDC 787308: Experimental Crystal Structure Determination

Related Article: C.Bazzicalupi, A.Bencini, S.Ciattini, F.Denat, P.Desogere, C.Goze, I.Matera, B.Valtancoli|2010|Dalton Trans.|39|11643|doi:10.1039/c0dt00948b

research product

CCDC 787304: Experimental Crystal Structure Determination

Related Article: C.Bazzicalupi, A.Bencini, S.Ciattini, F.Denat, P.Desogere, C.Goze, I.Matera, B.Valtancoli|2010|Dalton Trans.|39|11643|doi:10.1039/c0dt00948b

research product