Control of dual emission behaviour of μ-oxo-bridged Si(IV) corrole dimers by substituent bulkiness

18 April 2022, Version 1
This content is a preprint and has not undergone peer review at the time of posting.


The μ-oxo-bridged dimer of Si(IV) corrole has been recently reported to exhibit dual emissive properties depending on the solvent-viscosity. Here we examined the control of the excited-state dynamics and dual emission by meso-aryl substituents. Less hindered 10-unsubstituted and 10-phenyl-5,15-bis(pentafluorophenyl)-Si(IV) corrole dimers and more hindered 5,15-bis(pentafluorophenyl)-10-(2,4,6-trimethoxy)phenyl-Si(IV) corrole dimer were newly prepared and characterised. Interestingly, their solid-state structures are different; parallel, anti-parallel or orthogonal. In contrast, the energy-minimized structures in the excited-state have been suggested to be parallel in all cases owing to the significant excimer-like stabilization. As a result, different emission behaviours and viscosity dependence were observed.


Si complex
dual emission
viscosity dependence
solid-state structure

Supplementary materials

Electronic supplementary information for the manuscript titled Control of dual emission behaviour of μ-oxo-bridged Si(IV) corrole dimers by substituent bulkiness
1H NMR, HR-MS, optical and electrochemical properties, as well as single-crystal structures and DFT optimized structures.


Comments are not moderated before they are posted, but they can be removed by the site moderators if they are found to be in contravention of our Commenting Policy [opens in a new tab] - please read this policy before you post. Comments should be used for scholarly discussion of the content in question. You can find more information about how to use the commenting feature here [opens in a new tab] .
This site is protected by reCAPTCHA and the Google Privacy Policy [opens in a new tab] and Terms of Service [opens in a new tab] apply.