Table 1 The photophysical and electrochemical data of Th[10]CPP, oxTh[10]CPP, Nq[10]CPP, Aq[10]CPP and Tq[10]CPP

From: Acceptor engineering of quinone-based cycloparaphenylenes via post-synthesis for achieving white-light emission in single-molecule

 

λabsa, b (nm)

λema, c (nm)

ФFd (%)

Ï„e (ns)

Eg(opt)f (eV)

E1/2ox (eV)

E1/2red (eV)

EHOMOg(eV)

ELUMOh(eV)

Solution

Film

Th[10]CPP

341

493

487

17.4

τ = 1.3

2.87

0.77

-1.65, -2.41

-5.53

-3.42

oxTh[10]CPP

343, 430-560

464

570

4.0

τ = 2.6

2.34

1.05

-1.55, -2.43

-5.58

-3.49

Nq[10]CPP

338, 450-620

465

440, 662

0.7

τ1 = 0.5 (78.8 %)

τ2 = 3.4 (21.2 %)

2.02

0.99

-1.51, -2.00

-5.57

-3.57

Aq[10]CPP

339, 440-550

460, 628

446, 600

1.3

τ1 = 0.4 (85.6 %)τ2 = 4.0 (14.4 %)

2.24

0.78

-1.58, -2.18

-5.59

-3.53

Tq[10]CPP

329, 450-550

465, 598

462, 568

1.2

τ1 = 0.5 (91.1 %)τ2 = 4.7 (8.9 %)

2.31

0.64

-1.56, -2.04

-5.52

-3.63

  1. aUV-Vis absorption and fluorescence spectra were measured in CHCl3 (1 × 10-5 M) at room temperature.
  2. bWavelength of the maximum absorption.
  3. cEmission maximum (λex=highest intensity of absorption).
  4. dAbsolute fluorescence quantum yield.
  5. eLifetime in CHCl3 solution (X2 = 1.128, 1.002 and 1.117 for Nq[10]CPP, Aq[10]CPP and Tq[10]CPP, respectively,).
  6. fEstimated from absorption onset, Eg(opt) = 1240/λonset.
  7. gEHOMO = -(4.8+Eonsetox) eV (calibration by ferrocene).
  8. hELUMO = -(4.8+Eonsetred) eV (calibrated by ferrocene).
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