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Dimeric states of 2,7-dimethoxy-N-methylcarbazole in tetrahydrofuran at room temperature by T. Ganguly; L. Farmer; D. Gravel; G. Durocher is a scholarly article available to read on EtoBox.

What is Dimeric states of 2,7-dimethoxy-N-methylcarbazole in tetrahydrofuran at room temperature about?

It is shown that 2,7-dimethoxy-N-methylcarbazole (DMNMC) dimerizes over a certain concentration range as shown by the law of mass action for the monomer-dimer equilibrium. The dimeric spectrum consists of two branches, an intense one hypsochromic to the monomeric maximum, and a smaller bathochromic branch. The monomers are linked with their molecular planes and chromophores not parallel to each other. The fluorescence lifetime of the monomer goes from 8. I to 4.6 ns in the dimer, showing that the fluorescence of the dimer is optically allowed. An equilibrium constant (K) equal to 25 dm' mol-' at 296 K has been obtained. The dimeric structure prevents the dimer-excimer transformation.

Author

T. Ganguly; L. Farmer; D. Gravel; G. Durocher

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0009-2614)

Published

1992

Language

EN