Table 3 Results of photoluminescence measurements at 77 Ka

From: Regulating the photoluminescence of aluminium complexes from non-luminescence to room-temperature phosphorescence by tuning the metal substituents

  

λFluo/nm

λPhos/nm

ΦFluo

ΦPhos

LAlMe

Solution

445

541

0.96

0.04

Crystal

474

569

0.25

n.d.

LAlEt

Solution

429

530

n.d.

n.d.

Crystal

429

n.d.

n.d.

n.d.

LAlCl

Solution

428

510

0.93

0.03

Crystal

422

535

0.96

0.04

LAlBr

Solution

435

514

0.56

0.35

Crystal

422

506

0.56

0.26

LAlI

Solution

426

515

0.13

0.33

Crystal

425

507

0.03

0.74

  1. aExcited at the absorption maximum wavelength in solution state at room temperature. Solution, 1 × 10−5 M in 2-methylpentane/toluene (99/1, v/v); crystal, recrystallized from hexane; n.d., not determined due to negligible phosphorescence. Phosphorescence spectra were recorded with pulsed excitation. Quantum yields of fluorescence and phosphorescence were estimated by absolute quantum yields and deconvoluted photoluminescence spectra with multi-component Gaussian functions.
Back to article page