{"title":"Room-Temperature Columnar Liquid Crystals from Twisted and Macrocyclic 9,9′-Bifluorenylidene Mesogen with Ambipolar Carrier Transport Properties","authors":"Jinjia Xu*, ","doi":"10.1021/acsmaterialsau.3c00030","DOIUrl":null,"url":null,"abstract":"<p >We herein report the synthesis and characterization of a series of twisted and conjugated 9,9′-bifluorenylidene (<b>BF</b>) derivatives and a ladder-shaped cyclic dimer (<b>CBF</b>) bearing eight long alkoxy chains at peripheral positions. These contorted aromatics formed hexagonal columnar liquid crystalline mesophases over a wide temperature range, including room temperature. Ambipolar carrier transport properties with electron and hole mobility values of approximately 10<sup>–4</sup> and 10<sup>–5</sup> cm<sup>2</sup> V<sup>–1</sup> s<sup>–1</sup>, respectively, were achieved for the <b>BF</b> derivatives forming a monodomain orientation at ambient temperature.</p>","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"3 5","pages":"450–455"},"PeriodicalIF":5.7000,"publicationDate":"2023-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsmaterialsau.3c00030","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Materials Au","FirstCategoryId":"1085","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acsmaterialsau.3c00030","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
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Abstract
We herein report the synthesis and characterization of a series of twisted and conjugated 9,9′-bifluorenylidene (BF) derivatives and a ladder-shaped cyclic dimer (CBF) bearing eight long alkoxy chains at peripheral positions. These contorted aromatics formed hexagonal columnar liquid crystalline mesophases over a wide temperature range, including room temperature. Ambipolar carrier transport properties with electron and hole mobility values of approximately 10–4 and 10–5 cm2 V–1 s–1, respectively, were achieved for the BF derivatives forming a monodomain orientation at ambient temperature.
期刊介绍：
ACS Materials Au is an open access journal publishing letters articles reviews and perspectives describing high-quality research at the forefront of fundamental and applied research and at the interface between materials and other disciplines such as chemistry engineering and biology. Papers that showcase multidisciplinary and innovative materials research addressing global challenges are especially welcome. Areas of interest include but are not limited to:Design synthesis characterization and evaluation of forefront and emerging materialsUnderstanding structure property performance relationships and their underlying mechanismsDevelopment of materials for energy environmental biomedical electronic and catalytic applications
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