Table 2 Photophysical properties of BrGlu in the different phases

From: Reversible color switching of bright phosphorescence in purely organic materials for advanced data encryption

Compounds

Phase

λP (nm)

ΦP (%)a

τP (µs)b

kP (103 s−1)

knr (103 s−1)

BrGlu

B-crystal (Syn-rotamer)

480

43

150

2.9

3.8

G-crystal (Anti-rotamer)

510

93

220

4.2

0.3

  1. The table lists the emission maximum (λP), phosphorescence quantum yield (ΦP), phosphorescence lifetime (τP); the radiative and nonradiative decay rates kP, knr, where obtained via kP = ΦP/τP and knr = (1 − ΦP)/τP, assuming an ISC efficiency ηISC = 1.
  2. The emission wavelengths are noted at their maximum peaks.
  3. aAbsolute quantum yields were measured using an integrating sphere; errors are about ±1.
  4. bLifetimes (τp) were measured by a flash lamp. For B-crystal, τp was extracted using a mono-exponential fit. For G-crystal, a bi-exponential fit was applied, as shown in Supplementary Fig. 11.
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