Single-component solid state white-light emission and photoluminescence color tuning of a Cd(ii) complex and its application as a luminescence thermometer. Issue 43 (17th October 2019)

• Record Type: Journal Article
• Authors: Miao, Jinling; Nie, Yong; Li, Yexin; Qin, Chengyuan; Ren, Yifan; Xu, Chunyue; Yan, Meijing; Liu, Kexin; Liu, Guangning
• Is Part Of: Journal of materials chemistry. Volume 7:Issue 43(2019)
• Page Start: 13454
• Page End: 13460
• Publication Date: 2019-10-17
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c9tc04033a
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : A single-component white-light emitting Cd(ii ) complex exhibits tunable photoluminescence and acts as a novel luminescence thermometer based on the correlation between temperature and color temperature. Abstract : A single-component solid white-light emitter, the Cd(ii ) complex Cd2 (Sal)4 (PyNH2 )2 (1 ) (where Sal = 2-formylphenolato, PyNH2 = 4-aminopyridine), was synthesized in a simple procedure. Crystals of 1 display almost pure white-light emission upon excitation in a wide range from 300 to 400 nm. The white-light emission of 1 is composed of complementary blue and yellow components in an appropriate ratio, which belong to the ligand to metal (PyNH2 to Cd(ii )) charge transfer (LMCT) and the π–π* transition of Sal, respectively. Grinding crystals of 1 led to the transformation into the amorphous state along with the white-cyan-green emission color change and a color change from orange to yellow. The color of amorphous 1 could return to orange when heated. The emission color of amorphous 1 undergoes a gradual change from green to yellow when heated to 180 °C without a change in the molecular structure, and the corresponding color temperature exhibits a linear relationship with the heating temperature in a wide range (323–453 K), which makes amorphous 1 a reliable luminescence thermometer based on the photoemission energy.