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A set of ladder-type quaterphenyls with an incremental number of spiro-bifluorene units in the bridge positions as well as an in-plane bent quaterphenyl carrying all bridges on one and the… Click to show full abstract
A set of ladder-type quaterphenyls with an incremental number of spiro-bifluorene units in the bridge positions as well as an in-plane bent quaterphenyl carrying all bridges on one and the same side of the ribbon are synthesized and characterized. While spiro-bifluorene substituents lead to bathochromically shifted maxima in the UV–vis absorption spectra, this effect can be compensated by in-plane bending. The influence of different deposition techniques on the solid state structure is analyzed by X-ray diffraction of single crystals obtained by crystallization from solution as well as sublimation. An increasing number of spiro-bifluorene substituents are found to aid thin-film formation.
Journal Title: Advanced Functional Materials
Year Published: 2017
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