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Spiro‐Bridged Ladder‐Type Oligo( para ‐phenylene)s: Fine Tuning Solid State Structure and Optical Properties
Author(s) -
Kobin Björn,
Schwarz Jutta,
BraunCula Beatrice,
Eyer Moritz,
Zykov Anton,
Kowarik Stefan,
Blumstengel Sylke,
Hecht Stefan
Publication year - 2017
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201704077
Subject(s) - materials science , sublimation (psychology) , crystallography , solid state , diffraction , ribbon , phenylene , bent molecular geometry , polymer , optics , composite material , chemistry , psychology , physics , psychotherapist
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.