Altınölçek, NurayBattal, AhmetVardallı, Cemre NurTavaslı, MustafaYu, Holly A.Peveler, William J.Skabara, Peter J.2024-06-132024-06-132021-04-110022-2860https://doi.org/10.1016/j.molstruc.2021.130494https://www.sciencedirect.com/science/article/pii/S002228602100627Xhttps://hdl.handle.net/11452/421574-(9'-Hexylcarbazol-3'-yl)benzaldehyde (Cz-Ph-CHO: 4 ) and 4-(9'-hexylcarbazol-3'- yl)benzylidenemalononitrile (Cz-Ph-CN: 5 ) were synthesised with the structure of D-pi-A,where carbazole, phenylene and formyl/dicyanovinyl groups act as electron donor (D), pi-spacer (pi) and electron acceptor (A) units, respectively. The thermal, electrochemical, optical and intramolecular charge transfer (ICT) properties of compounds 4 and 5 were investigated. Compounds 4 and 5 , in particular their ICT behaviour, were also compared with the closely related structure, 2-(9'-hexylcarbazol-3'-yl)-5-pyridinecarbaldehyde (Cz-Py-CHO: 7 ). For the purpose of tuning chemical structure to obtain targeted properties, electrochemical data and absorption and emission measurements suggest that the dicyanovinyl unit in compound 5 is a better acceptor than formyl in compound 4, and that pyridine in compound 7 is a better pi-spacer than benzene in compound 4 , in exerting ICT characteristics such as fluorosolvatochromism and Stokes shifts.eninfo:eu-repo/semantics/openAccessIntramolecular charge-transferSensitized solar-cellsSolvent polarityElectrochemical propertiesTransport materialsOrganic-dyesDerivativesFluorescenceDesignBlueAcceptorCarbazoleIntramolecular charge transferPi-spacersSolvatochromismStokes shiftChemistryArticle000663587200009123910.1016/j.molstruc.2021.1304941872-8014