@article{fbbc1dd386164fbaae237c8e7f34618b,
title = "Azo-tagged C4N4 fluorophores: unusual overcrowded structures and their application to fluorescent imaging",
abstract = "The C4N4 fluorophore is an intense fluorescence emitter featuring a 2,5-diaminopyrimidine core comprising four carbon and four nitrogen atoms. A series of C4N4 derivatives was photochemically dimerized at the 5-amino group, furnishing overcrowded orthotetraaryl-substituted diaryl azo compounds with a characteristic skewed structure revealed by X-ray crystallography. The photo-quenched azo-C4N4s are useful for fluorescently visualizing cells under hypoxic conditions.",
author = "Miki Kohei and Naoki Takizawa and Ryosuke Tsutsumi and Wei Xu and Naoya Kumagai",
note = "Funding Information: This work was financially supported by JSPS KAKENHI Grant Number JP19K22192 (Grant-in-Aid for Exploratory Research, to N. K.) and JP20H02746 (Grant-in-Aid for Scientific Research (B), to N. K.). N. K. thanks Izumi Science and Technology Foundation, the Toyo Gosei Memorial Foundation, and the Sumitomo Foundation for financial support. Dr Tomoyuki Kimura at the Institute of Microbial Chemistry is gratefully acknowledged for X-ray crystallographic analysis. Publisher Copyright: {\textcopyright} 2023 Royal Society of Chemistry. All rights reserved.",
year = "2023",
month = jan,
day = "30",
doi = "10.1039/d3ob00049d",
language = "English",
volume = "21",
pages = "2889--2893",
journal = "Organic and Biomolecular Chemistry",
issn = "1477-0520",
publisher = "Royal Society of Chemistry",
number = "14",
}