ИСТИНА

Organosilicon derivatives of non-symmetric dialkyl-[1]benzothieno[3,2-b][1]benzothiophene (BTBT) derivatives provide large-area charge-transporting thin layers of the organic solar cells (OSC), which leads to outstanding sensing properties of the organic field-effect transistors (OFETs) [1]. These new materials combine, in addition to high hole mobility of charge carriers, thermal and air stability and high solubility in common organic solvents [2]. 1,3-bis{11-(7-heptyl [1]benzothieno [3,2-b][1] benzothio-2-yl)hexyl}-1,1,3,3-tetramethyl-disiloxane (BTBT-dimer) was deposited on electrolyte-gated organic field-effect transistors to fabricate a virus biosensor [3]. Transition to polymer derivatives of non-symmetric dialkyl BTBT can provide with functional materials with charge-transporting properties and mechanical properties suitable for ink-jet printing. Thus, polymer materials grafted with polysiloxane main-chain containing side-chains of 2-undecyl-11-en-7-hexyl[1]benzothieno[3,2-b][1]benzothiophene fragments were synthesized showing good thermal and thermo-oxidative stabilities [4]. In this work, polymer materials with longer terminal alkyl fragments were obtained and studied by thermogravimetric and differential calorimetric analysis as well as their blends with dioctyl BTBT. Thin films were deposited with blends and studied via atomic force microscopy (AFM). The work was carried out with the support of the Russian Science Foundation (project No. 19-73-30028).