(Z)-3-(Dicyanomethylene)-4-((5-fluoro-3,3-dimethyl-1-(3-phenylpropyl)-3H-indol-1-ium-2-yl) methylene)-2-(((E)-5-fluoro-3,3-dimethyl-1-(3-phenylpropyl)indolin-2-ylidene)methyl) cyclobut-1-en-1-olate
Round 1
Reviewer 1 Report
1. General Comments. The authors have presented a well-written note on the preparation of and a thorough analysis of the optical properties for (Z)-3-(dicyanomethylene)-4-((5-fluoro-3,3-dimethyl-1-(3-phe-2 nylpropyl)-3H-indol-1-ium-2-yl) methylene)-2-(((E)-5-fluoro-3 3,3-dimethyl-1-(3-phenylpropyl)indolin-2-ylidene)methyl) cyclobut-1-en-1-olate.
2. Editorial comments. While the article is generally free of language usage and grammatical errors, one correction needed was noted:
a. Page 3, Line 115. The word quantum is misspelled.
3. Content Comments.
a. References cited are appropriate and reflect both historic and current state of research in the area of squaraine synthesis and photophysical studies.
b. The optical properties study is very thorough and provides supportive context for the utility of squaraine derivatives as fluorophores.
c. Carbon-13 NMR is not provided in the supplemental information. As this is a new compound, complete characterization should include the 13C spectrum.
Author Response
See attached cover letter
Author Response File: 
Author Response.pdf
