Straightforward Synthesis and Properties of Highly Fluorescent [5]‐ and [7]‐Helical Dispiroindeno[2,1‐ c ]fluorenes

Autor:	Reinhard P. Kaiser, Lubomír Pospíšil, David Nečas, Jiří Mosinger, Timothée Cadart, Ivana Císařová, Martin Kotora, Róbert Gyepes
Rok vydání:	2019
Předmět:	Materials science Computational chemistry Intramolecular force General Chemistry General Medicine Electrochemistry Fluorescence Quantum Catalysis
Zdroj:	Angewandte Chemie. 131:17329-17334
ISSN:	1521-3757 0044-8249
DOI:	10.1002/ange.201908348
Popis:	This work presents a general approach for synthesis of substituted [5]-helical dispiroindeno[2,1-c]fluorenes based on Rh-catalyzed intramolecular cyclotrimerization of triynes. This approach was further extended for the first synthesis of configurationally stable [7]-helical dispiroindeno[2,1-c]fluorenes. A series of variously substituted derivatives was prepared and their photophysical and electrochemical properties were evaluated. Their fluorescence emission maxima were in the region of 351-428 nm and quantum yields up to 88 % are the highest measured among the full-carbon helical compounds.
Databáze:	OpenAIRE
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