Table 2 Photophysical properties of the NON-materials in MeTHF solution and 1% Zeonex matrix at 298 and 77 K

From: High triplet energy host material with a 1,3,5-oxadiazine core from a one-step interrupted Fischer indolization

 

298 K

kr

knr

77 K

 
 

λmax (nm)

τ (ns)

Φ (%, N2)a

(108 s−1)b

(108 s−1)c

λmax (nm)

τ

MeTHF solution

NON

338

1.4

23

1.7

5.5

337

400

2.6 ns

>3 s

NON-CF3

310

0.9d

12

1.4

10

302

400

5.9 ns

>3 s

NON-Br

315

1.1d

–

–

–

302

393

–

>3 s

1% Zeonex matrix

NON

336

1.8

21

1.2

4.4

–

–

NON-CF3

306

0.9d

10

1.2

10

–

–

NON-Br

350

1.1d

3

0.27

8.7

–

–

  1. aQuantum yields determined using an integrating sphere.
  2. bRadiative constant kr = Φ/τ.
  3. cnonradiative constant knr = (1 − Φ)/τ.
  4. dIn case of two-component lifetime τ an average was used: τav = (B1/(B1 + B2))τ1 + (B2/(B1 + B2))τ2, where B1 and B2 are the relative amplitudes for τ1 and τ2, respectively.
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