Bis(2-phenylpyridinato,-C2′,N)[4,4′-bis(4-Fluorophenyl)-6,6′-dimethyl-2,2′-bipyridine] Iridium(III) Hexafluorophosphate
Round 1
Reviewer 1 Report
The work reported, has been well presented and merits publication. However, references should be checked thoroughly and written appropriately. For example, either in abbreviated form or not. Also numbering of some references at the end, is duplicate. Please correct them.
To summarize
I suggest acceptance after taking my comments into consideration.
Author Response
We would like to thank reviewer 1 for the time and effort to evaluate our ms, His/her comments were valuable
The work reported, has been well presented and merits
publication. However, references should be checked thoroughly
and written appropriately. For example, either in abbreviated
form or not. Also numbering of some references at the end, is
duplicate. Please correct them.
To summarize
I suggest acceptance after taking my comments into
consideration.
All references were carefully checked and the requested corrections have been made
Reviewer 2 Report
The authors report the preparation and molecular structure of a fluorine-substituted bipyridine iridium cation in a pseudo-octahedral coordination geometry based on the metalated pyridine ancillary ligands. The compound is convincingly characterized by spectroscopic and analytical data. The compound gave modest emission as compared to related iridium derivatives, which may be a function of substitution. However, it seems more likely, as the authors indicate, that lower energy non-irradiative pathways become available with the para substitution. A molecular structure is provided via an X-ray diffraction study. The solution is poor by the crystallographic standards, but the dataset is clearly limited (7.5k reflections for an iridium compound). The structure is unsurprising, and the disappointing feature is merely that there are so many related derivatives that any structural comparison would be made at a more nuanced level than this data set provides. Overall, the work is well done. I have one minor suggestion but support publication. The authors have the 13C NMR data from the 2D experiments and should include this in the summary of experimental information for the compound.
Author Response
We would like to thank reviewer 2 for his/her comments. We are grateful for the time and effort spent reviewing our manuscript.
The authors report the preparation and molecular structure of a
fluorine-substituted bipyridine iridium cation in a pseudooctahedral
coordination geometry based on the metalated
pyridine ancillary ligands. The compound is convincingly
characterized by spectroscopic and analytical data. The
compound gave modest emission as compared to related iridium
derivatives, which may be a function of substitution. However, it
seems more likely, as the authors indicate, that lower energy
non-irradiative pathways become available with the para
substitution. A molecular structure is provided via an X-ray
diffraction study. The solution is poor by the crystallographic
standards, but the dataset is clearly limited (7.5k reflections for
an iridium compound). The structure is unsurprising, and the
disappointing feature is merely that there are so many related
derivatives that any structural comparison would be made at a
more nuanced level than this data set provides. Overall, the work
is well done. I have one minor suggestion but support
publication. The authors have the 13C NMR data from the 2D
experiments and should include this in the summary of experimental information for the compound.
Concerning the molecular structure of our compound: There are indeed numerous examples of bis-cyclometallated Ir(III) complexes bearing diimine type ligands. Although unsurprising in terms of molecular geometry, our compound is unique. It should also be mentioned that only a few examples of bis (phenylpyridinato) Ir(III) complexes containing a tetra-substituted bpy ligand exist.
13C NMR data were now added in the summary of experimental information of the compound, as requested.
