摘要
Thienoacenes is one of most important groups of semiconducting materials due to the high stability and superior mobility.However,there are scarce studies on the emission properties of thienoacenes to date.Herein,we synthesized fluorinated and chlorinated dibenzo[d,d’]thieno[3,2-b;4,5-b’]dithiophenes(DBTDTs)derivatives F6-DBTDT and Cl6-DBTDT by sulfoxide cyclization,significantly lowering the energy levels relative to the parent compound DBTDT.According to single crystal structure analysis,F6-DBTDT molecules adopt one-dimensional slipped stacking with closeπ-πinteractions of 3.43Å(1Å=0.1 nm),which is different from the parent compound DBTDT with herringbone stacking motif.Interestingly,the halogenated DBTDT derivatives exhibit enhanced emission properties both in solution and in the solid state,opening up possiblities to improve photoluminescence of thienoacences by halogenation.
基金
supported by the Fundamental Research Funds for the Central Universities,China(No.buctrc202103)
the National Natural Science Foundation of China(Nos.21975263,22171019,52373170)
the Project of the China Petroleum and Chemical Corporation(No.222131)
the Open Project Programs of Wuhan National Laboratory for Optoelectronics,China(No.2021WNLOKF005)
the Project of the State Key Laboratory of Fine Chemicals(Dalian University of Technology),China(No.KF2201).
