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Citation: Zhou Jin-Wei, Li Ya-Rong, Shen Jie-Ru. Calorimetric and Electrochemical Activity Measurement on the Interaction Between Anionic Cyanine Dye and Its Counterions in J-Aggregate Formation[J]. Acta Physico-Chimica Sinica, ;1991, 7(03): 318-322. doi: 10.3866/PKU.WHXB19910311 shu

Calorimetric and Electrochemical Activity Measurement on the Interaction Between Anionic Cyanine Dye and Its Counterions in J-Aggregate Formation

1.
Department of Chemistry, Northwestern University, Xi'an 710069

Received Date: 5 March 1990
Available Online: 15 June 1991

In DMF-H_2O(35%DMF, V/V) solution,the interaction between an anionic cyanine dye, 3,3'-di-(γ-sulfoProPyl)-9-ethyl-4, 5,4', 5'-dinaphthothis-carbocyanine triethylamine salt (Ⅰ) and its counterions, which induced J-aggregate formation, was studied by calorimetric and counterion activity measurement method. From calorimetric diagram,it was found,when CdCl_2 and LaCl_3 were added,J-aggregation enthalpy, △H_s, were -42.6, -42.0 kJ·mol~(-1) and the ratios of bounded counterions to the dye (Ⅰ) J-aggregate were 0.48:1, 0.31:1, respectively. It was also obtained from counterion activety measurement that the ratio of bounded Cd~(2+) to dye II) J-aggregase was 0.47:1. Such results indicated that dye (I) and counterions had formed a salt-like totality in the J-aggregate.
- Cyanine dye; J-aggregate; Counterion; Calorimetry; Ion activity measurement
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