Facile Synthesis and Chain-Length Dependence of the Optical and Structural Properties of Diketopyrrolopyrrole-Based Oligomers

Mukhopadhyay, Tushita and Puttaraju, Boregowda and Roy, Palas and Dasgupta, Jyotishman and Meyer, Andreas and Rudnick, Alexander and Tscheuschner, Steffen and Kahle, Frank-Julian and Koehler, Anna and Patil, Satish (2017) Facile Synthesis and Chain-Length Dependence of the Optical and Structural Properties of Diketopyrrolopyrrole-Based Oligomers. In: CHEMISTRY-A EUROPEAN JOURNAL, 23 (55). pp. 13718-13723.

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Abstract

Here, we report the synthesis, optical properties, and solid-state packing of monodisperse oligomers of diketopyrrolopyrrole (DPP) up to five repeating units. The optical properties of DPP oligomers in solution and the solid state were investigated by a combination of steady-state and transient spectroscopy. Transient absorption spectroscopy and time-correlated single photon counting (TCSPC) measurements show that the fluorescence lifetime decreases with an increase in the oligomer size from monomer to trimer, thereby reaching saturation for pentameric DPP oligomers. The solid-state packing and crystallinity were probed by using advanced techniques, which included grazing incidence small-angle X-ray scattering (GISAXS) and X-ray diffraction (XRD) to elucidate the structure-property trend. Collectively, our chain-length dependent studies establish the fundamental correlation between the structure and property and provide a comprehensive understanding of the solid-state properties in DPP-DPP based conjugated systems.

Item Type:	Journal Article
Publication:	CHEMISTRY-A EUROPEAN JOURNAL
Additional Information:	Copy right for this article belongs to the WILEY-V C H VERLAG GMBH, POSTFACH 101161, 69451 WEINHEIM, GERMANY
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	30 Oct 2017 03:40
Last Modified:	30 Oct 2017 03:40
URI:	http://eprints.iisc.ac.in/id/eprint/58095

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