Nano-gold-based synthesis, characterization and band gap energies of gold(III)-2(3)-tetrakis(allyloxy)-substituted phthalocyanine and gold(III)-phthalocyanine dyes

Autor: Emine Erdoğan, Mustafa Gülfen, Uğursoy Olgun, Salih Zeki Yıldız
Rok vydání: 2021
Předmět:
Zdroj: Journal of Materials Science: Materials in Electronics. 32:15011-15025
ISSN: 1573-482X
0957-4522
DOI: 10.1007/s10854-021-06054-7
Popis: In this study, we have attempted to synthesize Au (III)–phthalocyanine (Au–Pc) and Au (III)-2 (3)-tetrakis (allyloxy) phthalocyanine (Au–AoPc) by using phthalonitrile (Pn), 3 allyloxy-substituted phthalonitrile (Ao-Pn) and gold nanoparticles (AuNPs) as the starting materials. The N,N′-dimethyl amino ethanol (DMAE)-stabilized AuNPs were prepared from the HAuCl4 solution. The purple color AuNPs were obtained by the reduction of HAuCl4 solution by the addition of DMAE and adjusting pH 6–7 at room temperature. Then, the blue color Au–Pc and the green color Au–AoPc dye materials were synthesized at 120 °C temperature by the reactions of the AuNPs with Pn and AoPn. The obtained AuNPs, Au–Pc and Au–AoPc complexes were characterized using optical microscopy, transmission electron microscopy (TEM), UV–Vis absorption, FT-IR and electrospray ionization-mass spectrometry. The TEM analysis results showed that the sizes of AuNPs were mostly 30–40 nm and distributed within the range of 10–100 nm. By using the Tauc method, the optical band gap energies (Eg) were calculated as 1.66 eV for the Q-band and 3.12 eV for the B-band of the Au–Pc, and as 1.79 eV for the Q-band and 3.32 eV for the B-band of the Au–AoPc. The DMAE-stabilized AuNPs, the Au–Pc and the soluble Au–AoPc dyes with low band gap energy can be utilized for various technologies in electronics, imaging, sensors and solar cells.
Databáze: OpenAIRE
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