The indaceneditiophene (IDT) block is known in the literature as the central building unit to synthetize small [1,2] and polymer [3,4] acceptor molecules for organic solar cells [5,6]. The compounds presented below 1-3 are A-D-A acceptors, based on IDT as donor block (D) and different acceptor moieties (A), malononitrile for the compound 1, 2-cyanoacetic acid for the compound 2 and 2-(3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile for the compound 3 (Figure 1). Due to their strong intramolecular charge transfer, A-D-A systems typically exhibit strong and broad absorption bands that can be easily extended to the near-infrared (NIR) and hence substantially improve photocurrent generation and eventually allow the design of semitransparent devices. To tune the solubility and film morphology, hexyl side-chains were introduced on the central fused-ring block. Our work focuses on the synthesis and investigation of A-D-A acceptors adequate by modified (Figure 1) to be connected to molecular donors for the synthesis of single molecular organic solar cells (SMOSCs).formulaFigure 1. The chemical structure of the target compounds 1-3. The target compounds 1-3 were obtainedusing a multi-step strategy and their structure was confirmed by high resolution mass-spectrometry (HR-MS), 1H and 13C NMR spectroscopy. In addition, investigation of their electrochemical and absorption properties showed that our compounds are suitable for being used as non-fullerene acceptor unit in SMOSCs.