Described herein is an alternative synthetic approach for conjugated indeno[2,1-c]fluorene, including the experimental and theoretical investigations of a tetraradicaloid s-indaceno[2,1-c:6,5-c′]difluorene that belongs to the rarely explored indacenodifluorene family containing 4n + 2 monocyclic conjugated π-electrons. Expedient synthesis, broad absorption reaching 1150 nm, and small HOMO–LUMO energy gap make [2,1-c:6,5-c′]s-IDF a promising candidate for optoelectronic applications.

中文翻译：

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在探索完全共轭的s-indaceno [2,1-c：6,5-c']二芴的同时，重新研究茚[2,1-c]芴的合成。

本文描述了共轭茚并[2,1- c ]芴的另一种合成方法，包括对属于以下化合物的四自由基s- indaceno [2,1- c：6,5- c ']二芴的实验和理论研究。很少探索含有4 n + 2个单环共轭π电子的茚并二芴家族。方便的合成，高达1150 nm的宽吸收以及较小的HOMO-LUMO能隙使[2,1- c：6,5- c '] s -IDF成为光电子应用的有希望的候选者。