Highly conductive and stable polysiloxane-modified perylenebisimide nanosheets and nanowires by self-assembly and subsequent condensation

Abstract

Perylenebisimide (PBI) nanowires and nanosheets with high chemical and mechanical stability are prepared by a simple way. Firstly, a PBI-based organosilane precursor PBI-Si(OEt)3 was synthesized. Its nanostructures were then assembled by a solvent-exchange method. The nanostructures could be adjusted by assembling in different solvents. The obtained nanostructures were finally fixed by acetic acid vapor treatment through polycondensation of the triethoxysilyl groups in the precursors. After polycondensation, the nanostructures hardly change and they become insoluble in common solvents. Moreover, the conductivity of the polycondensed nanowires and nanosheets are ca. 35-40 times than that of polycondensed spin-coated PBI-Si(OEt)3 film by current sensing atomic force microscopy (CSAFM).

Targeted design leads to tunable photoluminescence from perylene dicarboxdiimide–poly(oxyalkylene)/siloxane hybrids for luminescent solar concentrators

“…Synthesis of N,N-bis(3-triethoxysilylpropyl)-1,6,7,12-tetra-tertbutylphenoxyperylene-3,4:9,10-tetra-carboxdiimide (PDI-Sil) 1,6,7,12-Tetra-tert-butylphenoxyperylene-3,4,9,10-tetracarboxylic dianhydride was synthesised following previously reported procedures. [41][42][43] Into a Schlenk flask containing 1,6,7,12-tetratert-butylphenoxyperylene-3,4,9,10-tetracarboxylic dianhydride (503 mg, 0.51 mmol) in dry ethanol (150 mL), 3-aminopropyltriethoxysilane (1.45 mL, 6.12 mmol, 12 eq.) was added dropwise.…”

Charge transport in a liquid crystalline triphenylene polymer monolayer at air–solid interface

“…Here we have studied the charge transport across a monolayer of triphenylene based discotic LCP material synthesized in our laboratory. We have employed current sensing atomic force microscope (CSAFM) for charge transport studies which has been widely used to determine the I−V behavior in polycondensed nanosheets 15 .…”

“…We have employed a current sensing atomic force microscope (CSAFM) for charge transport studies which has been widely used to determine the I-V behavior in polycondensed nanosheets. 15 In this article, we report our studies on the novel liquid crystalline polymer derived from 2,6-dihydroxy-3,7,10,11-tetraalkoxytriphenylene (PHAT) composed of electron rich triphenylene moieties (inset of Fig. 1).…”