Photofading of Azo Pyridone Dyes in Solution

Textile Reseach Journal - Tập 60 Số 5 - Trang 297-300 - 1990
Ing Jing Wang1, Ping Yueh Wang1
1Department of Textiles, National Taiwan Institute of Technology, Taipei, Taiwan, Republic of China

Tóm tắt

We report on the investigation and kinetic measurements of the photofading process of some o-, p-substituted azo pyridone dyes in formamide, N,N-dimethylformamide, and N,N'-dimethylacetamide. The free energies of solvation of dyes in the three solvents have been calculated by measuring the distribution coefficients of the dyes between the amide solvent and n-hexane as the immiscible standard solvent. A fair linear correlation exists between the observed rate constant and the free energies of transfer, suggesting the possibility that the photofading rate increases with increasing solvation of dyes; moreover it is increased by two electron-withdrawing substituents.

Từ khóa


Tài liệu tham khảo

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Thông tin
Thông tin xuất bản

Textile Reseach Journal

Tập 60 Số 5

297-300

Thông tin tác giả