1H NMR spectra were recorded with a Varian Inova 400 MHz
NMR system. MALDI-TOF mass spectrometric measurements were
performed on Bruker Bifiex III MALDI-TOF. UV–vis spectra of the
dyes were measured on a Techcomp 2300 spectrophotometer.
The PL spectra were obtained using Hitachi F-2500 luminescence
spectrometer. Cyclic and differential pulse voltammetry measurements
were performed on an electrochemical workstation
(CHILK2005A, Tianjin Lanlike Chemistry electronic high-tech Co.,
Ltd., PR China).