Abstract
Three bis(diazo) compounds of the indenofluorene series, 11,12-bis(diazo)-11,12-dihydro-indeno[2,1-a]fluorene (1b), 10,12-bis(diazo)-10,12-dihydroindeno[2,1-b]fluorene (2b), and 6,12-bis(diazo)-6,12-dihydroindeno[1,2-b]fluorene (3b) have been prepared and decomposed by an electrochemically initiated chain process in dimethylformamide solution. The black solutions so obtained show single-line e.s.r. spectra and electronic absorption spectra extend into the near infra-red region of the spectrum. in situ electrochemical e.s.r. spectra of electrolysed solutions of (1b) and (2b) in CH3CN are similar to spectra reported for lightly doped conjugated polymers. Chemical evidence is presented to show that the products are polyazines and the results of elemental and gel permeation chromatographic analysis suggest degrees of polymerisation in the range 2–5 for (1b) and ca. 17 for (2b) and (3b), although in the latter instances there is evidence for material of much greater molecular weight. The black solid materials isolated from the electrolysis solutions and containing supporting electrolyte (Me4NBF4) show specific conductivities of ca. 10–10(1b), 10–9(2b), and 10–6(3b) ohm–1 cm–1, all increasing to 10–4–10–3 on exposure to gaseous SO3.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of the Chemical Society, Perkin Transactions 2
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
