Comocat raw

Nearly monochiral
(6,5) SWCNT dispersions were obtained by shear-force mixing (Silverson
L2/Air, 10230 rpm) of 50 mg of CoMoCat raw material (Sigma-Aldrich,
MKCJ7287) in a solution of 65 mg of PFO-BPy (American Dye Source,
Inc., M_w = 40 kg mol^–1) in 140 mL of anhydrous toluene for 72 h at 20 °C as previously
described.^{50 (link)} The PFO-BPy-wrapped (6,5)
SWCNTs were separated from nonexfoliated material by two consecutive
centrifugation steps (45 min at 60 000g, Beckman
Coulter Avanti J26XP centrifuge). After the second centrifugation
step, the supernatant was filtered through a syringe filter (Whatman
PTFE membrane, pore size 5 μm) to yield a polymer-rich stock
dispersion of (6,5) SWCNTs. The purity of the (6,5) SWCNTs was confirmed
by absorption (Cary 6000i UV–vis–NIR spectrometer, Varian
Inc.) and Raman spectroscopy (InVia Reflex, Renishaw plc), see Figure S1, Supporting Information. For device
fabrication, the stock dispersion was vacuum-filtered through a polytetrafluoroethylene
membrane (Merck Millipore, JVWP, pore size 0.1 μm), and the
filter cake was submerged three times in 10 mL of toluene for 10 min
at 80 °C to remove excess polymer. The (6,5) SWCNTs were redispersed
by ultrasonication for 30 min in toluene. The toluene volume was adjusted
to yield an absorbance of 5 at the E₁₁ transition for 1
cm path length.

(6,5) SWCNTs were
selectively extracted from CoMoCAT raw material (Sigma-Aldrich, batch
no. MKCJ7287, 0.4 g L^–1) via polymer-wrapping with
poly[(9,9-dioctylfluorenyl-2,7-diyl)-alt-(6,6′-(2,2′-bipyridine))]
(PFO-BPy, American Dye Source, M_W = 40
kg mol^–1, 0.5 g L^–1) in toluene
under shear force mixing (Silverson L2/Air mixer, 10230 rpm, 72 h)
as described previously.^{30 (link)} To remove residual
aggregates and impurities, two consecutive centrifugation steps (60 000g, 45 min each) and subsequent filtration through a polytetrafluoroethylene
(PTFE) syringe filter (pore size 5 μm) were employed. The obtained
dispersion was either directly used for sp³ functionalization of (6,5) SWCNTs, or filtered through a PTFE membrane
(Merck Millipore JVWP, pore size 0.1 μm) and washed with toluene
(10 mL) for the fabrication of reference samples as detailed below.