Synthesis and characterization of novel cobalt aluminum cofacial porphyrins. First crystal and molecular structure of a heterobimetallic biphenylene pillared cofacial diporphyrin
作者:Roger Guilard、Michel Angel Lopez、Alain Tabard、Philippe Richard、Claude Lecomte、Stephane Brandes、James E. Hutchison、James P. Collman
DOI:10.1021/ja00051a021
日期:1992.12
The synthesis of the novel family of heterodinuclear complexes (DP)CoAl(OR) (where DP 4- is the tetraanion of the diporphyrin biphenylene DPB or the diporphyrin anthracene DPA, and R=CH 3 , CH 2 CH 3 , or CH 2 C 6 H 5 ) is reported. These complexes were obtained by selective metalation of the cofacial diporphyrins with cobalt and aluminium. Each (DP)CoAl(OR) complex was characterized by mass spectrometry
Dicyanoaromatic radical anions as mixed valence species
作者:Álvaro Moneo、M. Fernanda N. N. Carvalho、João P. Telo
DOI:10.1002/poc.2905
日期:2012.7
The reduction of nine symmetric dicyanoaromatic radicalanions by sodium amalgam in the presence of cryptand[2.2.2] was studied using cyclic voltammetry and using optical and electron paramagnetic resonance (EPR) spectroscopies in two aprotic solvents. All radicals are charge‐delocalized (Class III) mixedvalence species, as shown by the weak solvatochromism of their low‐energy optical bands and by
the highest selectivity for the TX mismatches, as these macrocycles show no apparent binding to the fully paired DNA. By contrast, other macrocyclicligands, as well as seven conventional DNA binders, show lesser or no selectivity for the mismatch sites. The study demonstrates that the topology of the ligands plays a crucial role in determining the mismatch‐binding affinity and selectivity of the macrocyclic
biphenylene) can control the direction of formation of a self-assembled structure. The fine-tuning of the distances between the two amidinium groups in the spacer units can help control the stabilizing interactions of two carboxylic acid units (intermolecular attraction) after the four-component assembly (see Scheme 1). Based on this concept, we succeeded in the formation of a four-component box-like assembled
A method for preparing a functionalized polymer, the method comprising the steps of polymerizing monomer to form a reactive polymer, and reacting the reactive polymer with a polycyano compound.