L. Dahne et al., J-AGGREGATES OF 4-IODO-BIS(DIMETHYLAMINO) HEPTAMETHINE TRIIODIDE - SYNTHESIS, STRUCTURE, AND OPTICAL-PROPERTIES, Chemische Berichte, 127(5), 1994, pp. 893-896
Iodination of heptamethincyanine 2a gives the title compound 3. Its ca
tions display all-trans configuration in solution and in the crystalli
ne state. In contrast to cations of 2a, those of 3 form one-dimensiona
l J aggregates, as proved by X-ray analysis and optical reflection spe
ctroscopy.